The Power to Transform

Linear Power
Switch Mode
Current Sense

TRANSFORMERS
 Table of Contents

Page

Table of Contents...................................................................1

Company Profile........ ..............................................................2

AH & ADH Series.. ..................................................................4
AHF Series.. ............................................................................5
AHI Series ..............................................................................6
ACST Series............................................................................7
44000 Series ..........................................................................8
AHR Series............................................................................10
AHP & ADHP..........................................................................11

Custom Designs ....................................................................14

Custom Design Inquiry..........................................................16
Technical Notes ....................................................................17

1
Corporate Profile

Zettler Magnetics, Inc. is a wholly-owned subsidiary of Zettler Components, Inc.

Zettler Magnetics, Inc. offers a wide range of UL approved open frame power trans-
formers available in horizontal or vertical designs, low profile, and international style
designs. We also offer a complete line of vacuum sealed transformers with power rat-
ings from 0.6VA to 60VA that carry UL and VDE approvals. In addition to our standard
open frame and sealed PCB mount power transformers, we also provide our cus-
tomers with custom designs for specialized applications. Zettler Magnetics offers a
truly global solution to almost every transformer requirement from our headquarters
located in Aliso Viejo, California.

The global manufacturing facilities for Zettler

Magnetics are strategically located
in Europe and Asia with prototype production
based in California. Controlling the manufac-
turing and quality of each transformer gives
assurance that our products meet the highest
possible standards in the industry. In addition, a highly knowledgeable sales force
works closely with an experienced applications engineering department to help define
the needs of our customers and to provide optimal solutions.

Zettler Magnetics is well renowned for traditional craftsmanship that is coupled

with engineering excellence. Utilizing state of the art manufacturing techniques and
equipment, such as a fully automated vacuum sealed transformer production line,
creates uniform manufacturing that ensures quality at a reliable consistency. Zettler
Magnetics is committed to providing the highest quality products to our customers.

2
 AH & ADH Series Linear Power

Features
• UL 506 approved Class 1 for use in the US and Canada
• UL approved Class B (130° C) Insulation System
• Split Bobbin Design
• Dielectric Stength 2500 Vrms
• Standard Single 115V or Dual 115/230V primaries at
50/60Hz
• Standard Dual Secondaries for variety of applications
• Precision Molded-in Terminals
• Available in 6 Standard Power Ratings

Order Number Secondary RMS Rating

Single Pri. Dual Pri.
115v 115/230V Series Parallel
6 Pin 8 Pin
AH20010 ADH20010 10VCT @ 0.110A 5V @ 0.220A
AH30010 ADH30010 10VCT @ 0.250A 5V @ 0.500A
AH40010 ADH40010 10VCT @ 0.600A 5V @ 1.200A
AH50010 ADH50010 10VCT @ 1.200A 5V @ 2.400A
AH60010 ADH60010 10VCT @ 2.000A 5V @ 4.000A
AH20012 ADH20012 12.6VCT @ 0.090A 6.3V@ 0.180A
AH30012 ADH30012 12.6VCT @ 0.200A 6.3V@ 0.400A
AH40012 ADH40012 12.6VCT @ 0.500A 6.3V@ 1.000A
AH50012 ADH50012 12.6VCT @ 1.000A 6.3V@ 2.000A
AH60012 ADH60012 12.6VCT @ 1.600A 6.3V@ 3.200A
AH20016 ADH20016 16VCT @ 0.070A 8V @ 0.140A
AH30016 ADH30016 16VCT @ 0.150A 8V @ 0.300A
AH40016 ADH40016 16VCT @ 0.400A 8V @ 0.800A
AH50016 ADH50016 16VCT @ 0.800A 8V @ 1.600A
AH60016 ADH60016 16VCT @ 1.250A 8V @ 2.500A
AH20020 ADH20020 20VCT @ 0.055A 10V @ 0.110A
AH30020 ADH30020 20VCT @ 0.120A 10V @ 0.240A
AH40020 ADH40020 20VCT @ 0.300A 10V @ 0.600A
AH50020 ADH50020 20VCT @ 0.600A 10V @ 1.200A
AH60020 ADH60020 20VCT @ 1.000A 10V @ 2.000A
AH20024 ADH20024 24VCT @ 0.045A 12V @ 0.090A
AH30024 ADH30024 24VCT @ 0.100A 12V @ 0.200A
AH40024 ADH40024 24VCT @ 0.250A 12V @ 0.500A
AH50024 ADH50024 24VCT @ 0500A 12V @ 1.000A
AH60024 ADH60024 24VCT @ 0.800A 12V @ 1.600A
AH20028 ADH20028 28VCT @ 0.040A 14V @ 0.080A
AH30028 ADH30028 28VCT @ 0.085A 14V @ 0.170A
AH40028 ADH40028 28VCT @ 0.200A 14V @ 0.400A
AH50028 ADH50028 28VCT @ 0.420A 14V @ 0.840A
AH60028 ADH60028 28VCT @ 0.700A 14V @ 1.400A
AH20036 ADH20036 36VCT @ 0.030A 18V @ 0.060A
AH30036 ADH30036 36VCT @ 0.065A 18V @ 0.130A
AH40036 ADH40036 36VCT @ 0.170A 18V @ 0.340A
AH50036 ADH50036 36VCT @ 0.350A 18V @ 0.700A
AH60036 ADH60036 36VCT @ 0.550A 18V @ 1.100A
AH20048 ADH20048 48VCT @ 0.023A 24V @ 0.046A
AH30048 ADH30048 48VCT @ 0.050A 24V @ 0.100A
AH40048 ADH40048 48VCT @ 0.125A 24V @ 0.250A
AH50048 ADH50048 48VCT @ 0.250A 24V @ 0.500A
AH60048 ADH60048 48VCT @ 0.400A 24V @ 0.800A
AH20056 ADH20056 56VCT @ 0.020A 28V @ 0.040A
AH30056 ADH30056 56VCT @ 0.045A 28V @ 0.090A
AH40056 ADH40056 56VCT @ 0.110A 28V @ 0.220A
AH50056 ADH50056 56VCT @ 0.220A 28V @ 0.440A
AH60056 ADH60056 56VCT @ 0.350A 28V @ 0.700A
AH200120 ADH200120 120VCT @ 0.010A 60V @ 0.020A
AH300120 ADH300120 120VCT @ 0.020A 60V @ 0.40A
AH400120 ADH400120 120VCT @ 0.050A 60V @ 0.100A
AH500120 ADH500120 120VCT @ 0.100A 60V @ 0.200A
AH600120 ADH600120 120VCT @ 0.160A 60V @ 0.320A

3
AH & ADH Series Linear Power

Specifications
WT.
SIZE VA L* W* H* M* A* B* C*
(lbs.)
1.375 1.125 0.930 0.250 0.250 1.220
2 1.1 - 0.17
34.93 28.58 23.62 6.35 6.35 30.99
1.375 1.125 1.170 0.250 0.250 1.220
3 2.4 - 0.25
34.93 28.58 29.72 6.35 6.35 30.99
1.625 1.313 1.290 1.063 0.250 0.350 1.280
4 6.0 0.44
41.28 33.35 32.77 26.99 6.35 8.89 32.51
1.875 1.563 1.410 1.250 0.300 0.400 1.400
5 12.0 0.70
47.63 39.69 35.81 31.75 7.62 10.16 35.56
2.250 1.875 1.410 1.500 0.300 0.400 1.590
6 20.0 0.80
57.15 47.63 35.81 38.10 7.62 10.16 40.39
2.625 2.188 1.560 0.400 0.400 1.840
7 36.0 - 1.1
66.68 55.56 39.62 10.16 10.16 46.74
Inches
* Millimeter

Outline Dimensions
OUTLINE DIMENSIONS Electrical Schematic
ELECTRICAL SCHEMATIC

Note: Pins 2 and 3

Omitted on Single
Primary Versions

4
 AHF Series Low Profile
ORDER NUMBER SECONDARY RMS RATINGS
Features
115/230V VA Series Parallel
• Has UL and CUR Agency Approvals Primary Size
• Dielectric Strength 1500 Vrms AHF02010 2.4 10VCT @ 250mA 5V @ 500mA
• Dual 115 V / 230 V Primaries AHF06010 6 10VCT @ 600mA 5V @ 1.2A
• Split Bobbin Design AHF12010 12 10VCT @ 1.2A 5V @ 2.4A
• Standard Dual Secondaries for a variety of AHF02012 2.4 12.6VCT @ 200mA 6.3V @ 400mA
Applications AHF06012 6 12.6VCT @ 450mA 6.3V @ 900mA
• Available in 3 Standard Sizes for a Variety AHF12012 12 12.6VCT @ 900mA 6.3V @ 1.8A
of Power Requirements AHF02016 2.4 16VCT @ 150mA 8V @ 300mA
AHF06016 6 16VCT @ 350mA 8V @ 700mA
AHF12016 12 16VCT @ 700mA 8V @ 1.4A
AHF02020 2.4 20VCT @ 125mA 10V @ 250mA
AHF06020 6 20VCT @ 300mA 10V @ 600mA
AHF12020 12 20VCT @ 600mA 10V @ 1.2A
AHF02024 2.4 24VCT @ 100mA 12V @ 200mA
AHF06024 6 24VCT @ 250mA 12V @ 500mA
AHF12024 12 24VCT @ 500mA 12V @ 1.0A
AHF02030 2.4 30VCT @ 85mA 15V @ 170mA
AHF06030 6 30VCT @ 200mA 15V @ 400mA
AHF12030 12 30VCT @ 400mA 15V @ 800mA
AHF02034 2.4 34VCT @ 75mA 17V @ 150mA
AHF06034 6 34VCT @ 170mA 17V @ 340mA
AHF12034 12 34VCT @ 340mA 17V @ 680mA
AHF02040 2.4 40VCT @ 60mA 20V @ 120mA
AHF06040 6 40VCT @ 150mA 20V @ 300mA
AHF12040 12 40VCT @ 300mA 20V @ 600mA
AHF02056 2.4 56VCT @ 45mA 28V @ 90mA
AHF06056 6 56VCT @ 100mA 28V @ 200mA
AHF12056 12 56VCT @ 200mA 28V @ 400mA
Outline Dimension AHF02088 2.4 88VCT @ 28mA 44V @ 56mA
AHF06088 6 88VCT @ 65mA 44V @ 130mA
Outline Dimensions AHF12088 12 88VCT @ 130mA 44V @ 260mA
DUAL PRIMARIES AHF02120 2.4 120VCT @ 20mA 60V @ 40mA
1 5 INDICATES AHF06120 6 120VCT @ 50mA 60V @ 100mA
POLARITY
AHF12120 12 120VCT @ 100mA 60V @ 200mA
AHF02230 2.4 230VCT @ 10mA 115V @ 20mA
2 6 AHF06230 6 230VCT @ 25mA 115V @ 50mA
4 8
AHF12230 12 230VCT @ 50mA 115V @ 100mA

3 7

115V/230V
50/60 Hz

A
Specifications
Specifications H
MAX L

VA L W H A B
1

1.875 1.562 0.650 1.600 0.375 B TYP

2.4 47.63 39.67 16.51 40.64 9.53
2

1.875 1.562 0.850 1.600 0.375 W

6 47.63 39.67 21.59 40.64 9.53
4

2.500 2.000 1.065 2.000 0.500

12 63.50 50.80 27.05 50.80 12.70
3

5
AHI Series Linear Power

Features
• UL 1585 approved Class 2, 3: UL File No.
E214561 (for 2.5 & 10 VA configurations, 5
VA is UL pending).
• Class B (130° C) Insulation system
• Built to meet requirments of IEC EN61558-1
& VDE safety standards
• Insulating shroud provides 4200 Vrms Hi-
POT dielectric strength
• Bobbin and shroud material meet UL 94V-0
flammability requirements
• Specially designed bobbin wall slots elimi-
nates all wire crossovers
• Dual bobbin non-concentric design reduces
capacitances and eliminates the need for an
electrostatic shield
• Precision pin alignment for easy drop-in
application

Mechanical Data Electrical Data

ELECTRICAL SCHEMATIC SECONDARY RMS RATING
PART NO. OUTPUT
4 8 SERIES PARALLEL

AHI02510 2.5VA 10VCT 0.25A 5V 0.50A

Primaries AHI05010 5.0VA 10VCT 0.50A 5V 1.00A
115V/230V 3 7 AHI01010 10.0VA 10VCT 1.00A 5V 2.00A
2 6
50/60Hz
AHI02512 2.5VA 12.6VCT 0.20A 6.3V 0.40A
0.188 MIN AHI05012 5.0VA 12.6VCT 0.40A 6.3V 0.80A
1 5 AHI01012 10.0VA 12.6VCT 0.80A 6.3V 1.60A
C
Indicates P olarity AHI02516 2.5VA 16VCT 0.15A 8V 0.30A
AHI05016 5.0VA 16VCT 0.31A 8V 0.62A
W
Square PC Terminal AHI01016 10.0VA 16VCT 0.62A 8V 1.25A
M
AHI02520 2.5VA 20VCT 0.12A 10V 0.24A
AHI05020 5.0VA 20VCT 0.25A 10V 0.50A
AHI01020 10.0VA 20VCT 0.50A 10V 1.00A
4

A 2XØ3.2
AHI02524 2.5VA 24VCT 0.10A 12V 0.20A
3

Clearance Hole
for Scre w
L B Mounting
AHI05024 5.0VA 24VCT 0.21A 12V 0.42A
2

AHI01024 10.0VA 24VCT 0.42A 12V 0.84A

A
1

AHI02528 2.5VA 28VCT 0.09A 14V 0.18A

AHI05028 5.0VA 28VCT 0.18A 14V 0.36A
AHI01028 10.0VA 28VCT 0.36A 14V 0.72A

AHI02536 2.5VA 36VCT 0.07A 18V 0.14A

AHI05036 5.0VA 36VCT 0.14A 18V 0.28A
H White Dot AHI01036 10.0VA 36VCT 0.28A 18V 0.56A
denotes PIN 1

6
 ACST Series
Features
• UL approved Class B insulation system
• Dielectric strength 3000 Vrms
• Specially designed split bobbin
• Small physical package for tight configura-
tions
• Typical output of 110m V per Ampere
• Cost Effective
• ACST-260 have Standard solid wire Primary
Leads
• ACST-260- 1 have Tinned solid wire Primary
Leads

Electrical Specifications

Mechanical Data
.807 Max
(20.5)

1A
.630 Max
(16.0)
PRI S ense

2A
5
8 1A 2A 5
Indicates Polarity

.689 Max
.3 7 0 (17.5)
(9.4)

.4 0 2
1A 2A
(1 0 .2 ) .110
.169
(4.3) (2.8)
8 5
2 xØ .0 2 5 M a x S q
Bottom View (.64)
2 xØ .0 6 M a x
.598
(15.2) (1.52)

7
44000 Series Sealed
Features
• UL and VDE approvals to conform with EN 60742
• Vaccum Sealed for increased protection
• Split Bobbin Design
• Dielectric Strength 4200 Vrms
• Standard Single Primary Winding 115V at 50/60 Hz
• Standard Single or Dual Secondaries for variety of
applications
• Inherently Energy Limited
• Available in 11 Power Ratings

Single Secondary Dual Secondaries

Part No Output (Vrms) Part No Output (Vrms)
Power
Single Single VA Single Single Pri. Single Series Parallel
Pri. 115V Pri. 230V (V@A) 115V Pri. 230V (V@A) (V @ A)

44025 44013 0.6 6 @ 0.100 44031 44019 12 @ 0.050 6 @ 0.100

44026 44014 0.6 9 @ 0.066 44032 44020 18 @ 0.033 9 @ 0.066
44027 44015 0.6 12 @ 0.050 44033 44021 24 @ 0.025 12 @ 0.050
44028 44016 0.6 15 @ 0.040 44034 44022* 30 @ 0.020 15 @ 0.040
44029 44017 0.6 18 @ 0.033 44035 44023* 36 @ 0.017 18 @ 0.033
44030 44018 0.6 24 @ 0.025 44036 44024* 48 @ 0.013 24 @ 0.025
44061 44049 1.0 6 @ 0.167 44067 44055 12 @ 0.084 6 @ 0.167
44062 44050 1.0 9 @ 0.111 44068 44056 18 @ 0.056 9 @ 0.111
44063 44501 1.0 12 @ 0.083 44069 44057 24 @ 0.042 12 @ 0.083
44064 44052 1.0 15 @ 0.067 44070 44058 30 @ 0.034 15 @ 0.067
44065 44053 1.0 18 @ 0.056 44071 44059 36 @ 0.028 18 @ 0.056
44066 44054 1.0 24 @ 0.042 44072 44060* 48 @ 0.021 24 @ 0.042
44097 44085 1.5 6 @ 0.250 44103 44091 12 @ 0.125 6 @ 0.250
44098 44086 1.5 9 @ 0.167 44104 44092 18 @ 0.084 9 @ 0.167
44099 44087 1.5 12 @ 0.125 44105 44093 24 @ 0.063 12 @ 0.125
44100 44088 1.5 15 @ 0.100 44106 44094 30 @ 0.050 15 @ 0.100
44101 44089 1.5 18 @ 0.083 44107 44095* 36 @ 0.042 18 @ 0.083
44102 44090 1.5 24 @ 0.063 44108 44096* 48 @ 0.032 24 @ 0.063
44133 44121 2.0 6 @ 0.333 44139 44127 12 @ 0.167 6 @ 0.333
44134 44122 2.0 9 @ 0.222 44140 44128 18 @ 0.111 9 @ 0.222
44135 44123 2.0 12 @ 0.167 44141 44129 24 @ 0.084 12 @ 0.167
44136 44124 2.0 15 @ 0.133 44142 44130 30 @ 0.067 15 @ 0.133
44137 44125 2.0 18 @ 0.111 44143 44131* 36 @ 0.056 18 @ 0.111
44138 44126 2.0 24 @ 0.083 44144 44132* 48 @ 0.042 24 @ 0.083
44169 44157 2.3 6 @ 0.383 44175 44163 12 @ 0.192 6 @ 0.383
44170 44158 2.3 9 @ 0.256 44176 44164 18 @ 0.128 9 @ 0.256
44171 44159 2.3 12 @ 0.192 44177 44165 24 @ 0.096 12 @ 0.192
44172 44160 2.3 15 @ 0.153 44178 44166 30 @ 0.077 15 @ 0.153
44173 44161 2.3 18 @ 0.128 44179 44167* 36 @ 0.064 18 @ 0.128
44174 44162 2.3 24 @ 0.096 44180 44168* 48 @ 0.048 24 @ 0.096
44205 44193 3.2 6 @ 0.533 44211 44199 12 @ 0.267 6 @ 0.533
44206 44194 3.2 9 @ 0.356 44212 44200 18 @ 0.178 9 @ 0.356
44207 44195 3.2 12 @ 0.267 44213 44201 24 @ 0.134 12 @ 0.267
44208 44196 3.2 15 @ 0.213 44214 44202 30 @ 0.107 15 @ 0.213
44209 44197 3.2 18 @ 0.178 44215 44203 36 @ 0.089 18 @ 0.178
44210 44198 3.2 24 @ 0.133 44216 44204* 48 @ 0.067 24 @ 0.133

8
 4000 Series Sealed

Features
• UL and VDE approvals to conform with EN 60742
• Vaccum Sealed for increased protection
• Split Bobbin Design
• Dielectric Strength 4200 Vrms
• Standard Single Primary Winding 115V at 50/60 Hz
• Standard Single or Dual Secondaries for variety of
applications
• Inherently Energy Limited
• Available in 11 Power Ratings

Single Secondary Dual Secondaries

Part No Output (Vrms) Part No Output (Vrms)
Power
Single Single Single Single Pri. Single Series Parallel
VA
Pri. 115V Pri. 230V (V@A) 115V Pri. 230V (V@A) (V @ A)
44241 44229 5.0 6 @ 0.833 44247 44235 12 @ 0.417 6 @ 0.833
44242 44230 5.0 9 @ 0.556 44248 44236 18 @ 0.278 9 @ 0.556
44243 44231 5.0 12 @ 0.417 44249 44237 24 @ 0.209 12 @ 0.417
44244 44232 5.0 15 @ 0.333 44250 44238 30 @ 0.167 15 @ 0.333
44245 44233 5.0 18 @ 0.278 44251 44239 36 @ 0.139 18 @ 0.278
44246 44234 5.0 24 @ 0.208 44252 44240* 48 @ 0.104 24 @ 0.208
44277 44265 10.0 6 @ 1.667 44283 44271 12 @ 0.834 6 @ 1.667
44278 44266 10.0 9 @ 1.111 44284 44272 18 @ 0.556 9 @ 1.111
44279 44267 10.0 12 @ 0.833 44285 44273 24 @ 0.417 12 @ 0.833
44280 44268 10.0 15 @ 0.667 44286 44274 30 @ 0.334 15 @ 0.667
44281 44269 10.0 18 @ 0.556 44287 44275 36 @ 0.278 18 @ 0.556
44282 44270 10.0 24 @ 0.417 44288 44276* 48 @ 0.209 24 @ 0.417
44313 44301 16.0 6 @ 2.667 44319 44307 12 @ 1.334 6 @ 2.667
44314 44302 16.0 9 @ 1.778 44320 44308 18 @ 0.889 9 @ 1.778
44315 44303 16.0 12 @ 1.330 44321 44309 24 @ 0.665 12 @ 1.330
44316 44304 16.0 15 @ 1.067 44322 44310 30 @ 0.534 15 @ 1.067
44317 44305 16.0 18 @ 0.889 44323 44311 36 @ 0.445 18 @ 0.889
44318 44306 16.0 24 @ 0.667 44324 44312* 48 @ 0.334 24 @ 0.667
44444 44432 22.0 6 @ 3.667 44450 44438 12 @ 1.834 6 @ 3.667
44445 44433 22.0 9 @ 2.444 44451 44439 18 @ 1.222 9 @ 2.444
44446 44434 22.0 12 @ 1.833 44452 44440 24 @ 0.917 12 @ 1.833
44447 44435 22.0 15 @ 1.467 44453 44441 30 @ 0.734 15 @ 1.467
44448 44436 22.0 18 @ 1.222 44454 44442 36 @ 0.611 18 @ 1.222
44449 44437 22.0 24 @ 0.917 44455 44443* 48 @ 0.459 24 @ 0.917
44385 44373 30.0 6 @ 5.000 44391 44379 12 @ 2.500 6 @ 5.000
44386 44374 30.0 9 @ 3.333 44392 44380 18 @ 1.667 9 @ 3.333
44387 44375 30.0 12 @ 2.500 44393 44381 24 @ 1.250 12 @ 2.500
44388 44376 30.0 15 @ 2.000 44394 44382 30 @ 1.000 15 @ 2.000
44389 44377 30.0 18 @ 1.667 44395 44383 36 @ 0.834 18 @ 1.667
44390 44378 30.0 24 @ 1.250 44396 44384* 48 @ 0.625 24 @ 1.250
* Limited Approval Ratings

9
 AHR Series Chassis Mount

Part NUMBERING
PART Numbering System
SYSTEM

AHR 40 309 FM QT XXXX

Basic Series Designation

VA Rating - See Below

Primary and Secondary Voltages - See Below

Mounting - See Below

Termination - See Below

Optional Customer Assign (XXXX)

Part number ordering information.

Mounting
MOUNTING VARATING
VA Rating
Designator Mounting Type Designator Secondary VA
FM Foot Mount, Bracket 30 30
MM Multi Mount Adapter Plate 40 40
PM Panel Mount, Lam Holes
FC Screw Term
Termination
TERMINATION
Designator Terminal Type
Primary&&
PRIMARY Secondary
SECONDARY Voltages
VOLTAGES
NIL No QD or Wire
Designator Primary Secondary Freq.
QT Top Quick Disconnect
Volts Volts Hz
120 24 60 Q1 One Side QD
309
310 208/240 24 50/60 Q2 Both Sides QD

311 120 24 50/60 W Wire Leads

312 240 24 50/60 QW QD and Wire Leads

313 277 24 50/60

314 480 24 50/60
NOTES
315 380/415 24 50/60 1. This is a partial listing only, consult factory for your specific
requirements. All voltage & VA combinations may not be available.
316 575 24 50/60
2. Example: AHR40309FMQT-5555. This part is a 40V Class II
317 120/240 24 50/60 transformer with a 120V Primary and 24V Secondary. This is a
foot mount transformer with top mounted quick disonnect terminals.
318 120/208/240 24 50/60

10
 AHP-ADHP Series

° Single or Dual Primary (115/230V)

° Designed to meet International Safety Requirements
° Inherently Limited Versions available
° UL94V-0 Rated materials
° 4500 Vrms Isolation Strength (pri:Sec)
° Designed for EN60950, UL1477 and UL 1585
° Class A & B Insulation
Electrical Data
Part No Part No Secondary Output (Vrms)
Output
Series Parallel Dual Output
Single Pri. Dual Pri. (VA)
115V 115/230V VCT Amps Vrms Amps Vrms-Vrms Amps

AHP012050 ADHP012050 1.2 10.0 @ 0.120 5.0 @ 0.240 5-5 @ 0.120

AHP020050 ADHP020050 2.0 10.0 @ 0.200 5.0 @ 0.400 5-5 @ 0.200
AHP030050 ADHP030050 3.0 10.0 @ 0.300 5.0 @ 0.600 5-5 @ 0.300
AHP060050 ADHP060050 6.0 10.0 @ 0.600 5.0 @ 1.200 5-5 @ 0.600
AHP105050 ADHP105050 10.5 10.0 @ 1.050 5.0 @ 2.100 5-5 @ 1.050
AHP145050 ADHP145050 14.5 10.0 @ 1.450 5.0 @ 2.900 5-5 @ 1.450
AHP012063 ADHP012063 1.2 12.6 @ 0.095 6.3 @ 0.190 6.3-6.3 @ 0.095
AHP020063 ADHP020063 2.0 12.6 @ 0.158 6.3 @ 0.315 6.3-6.3 @ 0.158
AHP030063 ADHP030063 3.0 12.6 @ 0.238 6.3 @ 0.476 6.3-6.3 @ 0.238
AHP060063 ADHP060063 6.0 12.6 @ 0.476 6.3 @ 0.952 6.3-6.3 @ 0.476
AHP105063 ADHP105063 10.5 12.6 @ 0.834 6.3 @ 1.667 6.3-6.3 @ 0.834
AHP145063 ADHP145063 14.5 12.6 @ 1.151 6.3 @ 2.302 6.3-6.3 @ 1.151

AHP012080 ADHP012080 1.2 16.0 @ 0.075 8.0 @ 0.150 8-8 @ 0.075

AHP020080 ADHP020080 2.0 16.0 @ 0.125 8.0 @ 0.250 8-8 @ 0.125
AHP030080 ADHP030080 3.0 16.0 @ 0.188 8.0 @ 0.375 8-8 @ 0.188
AHP060080 ADHP060080 6.0 16.0 @ 0.375 8.0 @ 0.750 8-8 @ 0.375
AHP105080 ADHP105080 10.5 16.0 @ 0.657 8.0 @ 1.313 8-8 @ 0.657
AHP145080 ADHP145080 14.5 16.0 @ 0.907 8.0 @ 1.813 8-8 @ 0.907

AHP012100 ADHP012100 1.2 20.0 @ 0.060 10.0 @ 0.120 10-10 @ 0.060

AHP020100 ADHP020100 2.0 20.0 @ 0.100 10.0 @ 0.200 10-10 @ 0.100
AHP030100 ADHP030100 3.0 20.0 @ 0.150 10.0 @ 0.300 10-10 @ 0.150
AHP060100 ADHP060100 6.0 20.0 @ 0.300 10.0 @ 0.600 10-10 @ 0.300
AHP105100 ADHP105100 10.5 20.0 @ 0.525 10.0 @ 1.050 10-10 @ 0.525
AHP145100 ADHP145100 14.5 20.0 @ 0.725 10.0 @ 1.450 10-10 @ 0.725

AHP012120 ADHP012120 1.2 24.0 @ 0.050 12.0 @ 0.100 12-12 @ 0.050

AHP020120 ADHP020120 2.0 24.0 @ 0.083 12.0 @ 0.165 12-12 @ 0.083
AHP030120 ADHP030120 3.0 24.0 @ 0.125 12.0 @ 0.250 12-12 @ 0.125
AHP060120 ADHP060120 6.0 24.0 @ 0.250 12.0 @ 0.500 12-12 @ 0.250
AHP105120 ADHP105120 10.5 24.0 @ 0.438 12.0 @ 0.875 12-12 @ 0.438
AHP145120 ADHP145120 14.5 24.0 @ 0.604 12.0 @ 1.208 12-12 @ 0.604

AHP020140 ADHP020140 2.0 36.0 @ 0.083 14.0 @ 0.165 14-14 @ 0.083

AHP030140 ADHP030140 3.0 28.0 @ 0.107 14.0 @ 0.214 14-14 @ 0.107
AHP060140 ADHP060140 6.0 28.0 @ 0.215 14.0 @ 0.429 14-14 @ 0.215
AHP105140 ADHP105140 10.5 28.0 @ 0.375 14.0 @ 0.750 14-14 @ 0.375
AHP145140 ADHP145140 14.5 28.0 @ 0.518 14.0 @ 1.036 14-14 @ 0.518

AHP020180 ADHP020180 2.0 36.0 @ 0.055 18.0 @ 0.110 18-18 @ 0.055

AHP030180 ADHP030180 3.0 36.0 @ 0.084 18.0 @ 0.167 18-18 @ 0.084
AHP060180 ADHP060180 6.0 36.0 @ 0.167 18.0 @ 0.333 18-18 @ 0.167
AHP105180 ADHP105180 10.5 36.0 @ 0.292 18.0 @ 0.583 18-18 @ 0.292
AHP145180 ADHP145180 14.5 36.0 @ 0.403 18.0 @ 0.806 18-18 @ 0.403

AHP020240 ADHP020240 2.0 48.0 @ 0.041 24.0 @ 0.082 24-24 @ 0.041

AHP030240 ADHP030240 3.0 48.0 @ 0.063 24.0 @ 0.125 24-24 @ 0.063
AHP060240 ADHP060240 6.0 48.0 @ 0.125 24.0 @ 0.250 24-24 @ 0.125
AHP105240 ADHP105240 10.5 48.0 @ 0.219 24.0 @ 0.438 24-24 @ 0.219
AHP145240 ADHP145240 14.5 48.0 @ 0.302 24.0 @ 0.604 24-24 @ 0.302

Schematic & Mechanical data

AHP/ADHP 012 Series
AHP ADHP 28.9 MAX 29.5 MAX
Input Input Output
5

3 6
8 29.8 MAX
2

1 9

115V 50/60 Hz 115/230V 50/60 Hz

11
 AHP-ADHP Series

AHP/ADHP 020 Series

AHP ADHP
Input Input Output

4 5

3 6
2 7

1 8

115V 50/60 Hz 115/230V 50/60 Hz

4.2 ± 0.3

AHP/ADHP 030 Series

AHP ADHP
Input Input Output
5 6

4 7

2 9

1
1 10

115V 50/60 Hz 115/230V 50/60 Hz

4.2 ± 0.3

AHP/ADHP 060 Series

AHP ADHP
Input Input Output 41.3 MAX 33.2 MAX
5

3 6

2 8 41.0 MAX

1 9
115V 50/60 Hz 115/230V 50/60 Hz

4.2 ± 0.3
23 ±0.3

AHP/ADHP 105 Series

AHP ADHP
Input Input Output
5 6

4 7

2 9
43.2 MAX

1 10

115V 50/60 Hz 115/230V 50/60 Hz

4.2 ± 0.3

AHP/ADHP 145 Series

AHP ADHP
Input Input Output
5 6

4 7

2 9

1 10

115V 50/60 Hz 115/230V 50/60 Hz

4.2 ± 0.3

12
 AHR Series

30 VA - 40 VA QUICK CONNECT
CLASS 2 UL 1585 Approval

Features
• 30VA - 40 VA Inherently energy limited
• Compact frame size
• No secondary fusing required
• Low heat rise
• Operation Frequency: 50/60 Hz
• Input voltages 120-575 V, output-24 V
• Terminations with quick-connect: top, one side, or both sides
• Customization for wire length, color, terminations and
other preferences
• Split bobbin design C US
• Class B insulation system 130°C rated
• UL/CUR File E214561

General Data
GENERAL DATA Standard MODELS
STANDARD ModelsAVAILABLE
Available
Foot Mount, Bracket Pri. - Sec. 30VA Standard 40VA Standard
Mounting Voltage Model Designation Model Designation
Multi Mount Adapter Plate (4x4)
Options
Panel Mount, Lam Holes 120 – 24 AHR30309 AHR40309
QT – Top mounted QD terminals 208/240 – 24 AHR30310 AHR40310
Quick Connect
Q1 – One side QD terminals
Options 120 – 24 AHR30311 AHR40311
Q2 – Both sides QD terminals
240 – 24 AHR30312 AHR40312
Quick Connect Standard male quick connect
Size terminals are .250 x .032 277 – 24 AHR30313 AHR40313

Frequency 60 Hz, 50/60 Hz 480 – 24 AHR30314 AHR40314

Insulation 380/415 – 24 AHR30315 AHR40315
130˚C Class B
System
575 – 24 AHR30316 AHR40316
120/240 – 24 AHR30317 AHR40317
120/208/240 – 24 AHR30318 AHR40318

NOTES
Zettler Magnetics, Inc. can custom build transformers to many different
specifications. Contact Zettler Magnetics directly for more information

13
 AHR Series

30 VA - 40 VA QUICK CONNECT
CLASS 2 UL 1585 Approval
Mechanical Data
Type Q1 One Side Termination
82.4

71.4
QUICK CONNECT 57.0

ZETTLER MAGNETICS

US
6.35 x 0.8 (TYP)

R
5.56

C
32.0
C R

48.7

76.0 G
MAX Y W

67.0
MAX
32.0
2xØ4.75 1.2 MAX

Type Q2 Both Side Termination

82.4

71.4 57.0

ZETTLER MAGNETICS

US
R
QUICK CONNECT
5.56 6.35 x 0.8 (TYP)

C
32.0 32.0
C R

94.5 48.7
MAX 75.0
Y G W
LABEL:45x14
2xØ4.75
32.0
MAX
1.2

Type QT Top Mount Termination

QUICK CONNECT
6.35 x 0.8 (TYP)
82.5
MAX
82.4
71.4 32.0
57.0 MAX
ZETTLER MAGNETICS

US
R

C R
C

32.0
19.05 47.5

Y G W
2xØ4,75
36.0

LABEL:45x14

1.20

* All dimensions are shown in millimeters.

14
 AHR Series

30 VA - 40 VA QUICK CONNECT
CLASS 2 UL 1585 Approval

Features
• 30VA - 40 VA Inherently energy limited
• Compact frame size
• No secondary fusing required
• Low heat rise
• Operation Frequency: 50/60 Hz
• Input voltages 120-575 V, output-24 V
• Terminations with screw,quick-connector wire leads
• Customization for wire length, color, terminations and
other preferences
• Split bobbin design
• Class B insulation system 130°C rated US
C
• UL/CUR File E214561

Standard Models
STANDARD MODELS Available
AVAILABLE
Pri. - Sec. 30VA Standard 40VA Standard
Voltage Model Designation Model Designation
120 – 24 AHR30309 AHR40309
208/240 – 24 AHR30310 AHR40310
120 – 24 AHR30311 AHR40311
240 – 24 AHR30312 AHR40312
277 – 24 AHR30313 AHR40313
480 – 24 AHR30314 AHR40314

General Data
GENERAL DATA 380/415 – 24 AHR30315 AHR40315
575 – 24 AHR30316 AHR40316
Foot Mount, Bracket
Mounting Multi Mount Adapter Plate 120/240 – 24 AHR30317 AHR40317
Options Panel Mount, Lam Holes
Screw Term. 120/208/240 – 24 AHR30318 AHR40318

All leads are 18 AWG stranded

Wire Size
UL1015 Wire Lead
WIRE LEAD Details
DETAILS
Stranded wires have 300mm
total length, with 10mm strip Length Strip Length
Voltage Color*
(mm) (mm)
Frequency 60 Hz, 50/60 Hz
COM Black 300 10
Insulation
130˚C Class B 120 White 300 10
System
Primary 208 Red 300 10
30VA multi-mount 1.86lbs
30VA foot-mount 1.50lbs 240 Orange 300 10
Weight
40VA multi-mount 2.14lbs 277 Brown 300 10
40VA foot-mount 1.78lbs
480 Black/Red 300 10
575 Grey 300 10
NOTES 24 Blue 300 10
Secondary
Zettler Magnetics, INC. can custom build COM Yellow 300 10
transformers to many different specifications.
Contact Zettler Magnetics for more information. * Suggested wire colors: consult factory for specific wire color requirements.

15
 AHR Series

30 VA - 40 VA Wire Lead Connect

CLASS 2 UL 1585 Approval

Mechanican Data

32.0
MAX
Type FM Foot Mount Bracket
57

US
ZETTLER MAGNETICS
5.56

C
32.0

48.7

WHT
YEL
82.4 71.4
LABEL:45x14

BLU
1.2

BLK
300±10 300±10

10.0±2

WHT BLK 2xØ4.75

60.6
MAX

Type PM Panel Mount

47.75

32.0
MAX
57.0
5.56 4 x 4.6
US
ZETTLER MAGNETICS
R

C
40VA 50/60Hz
INPUT: 480V 50/60Hz BLK-WHT

WHT
YEL
OUTPUT:24V 40VA YEL-BLU
MADE IN CHINA

32.0
CLASS 2 XFMR

47.5 38.1
AHR40314FMW

BLU

BLK
LABEL:45x14
300±10 300±10

60.6
10.0±2 MAX
WHT BLK

32.0
MAX Type FC Screw Termination
57.0
US

5.56
ZETTLER MAGNETICS
R

5 x #6 x 1/4" long
SCREW
C R
TERMINAL
32.0
67.0
MAX
47.5

Y G W

LABEL:45x14
BLK

250±10
WHT

15±2

WHT BLK

All dimensions are shown in millimeters except as noted.

16
 Custom Designs

Inductors
Custom designed inductors for a large varity of
applications for low frequencies as well as high
frequencies.

Common Mode Choke Transformers

Suitable for dimmers, fans, mixers, juicers, power tools,
measuring instruments, acoustic systems, TVs, desk
top calculators, computers, various types of terminals,
prevention of noise (EMI) in the I/O of switching power
supplies.

AC Current Sensors
Current sensors for sensing AC loads are used in
numerous applications. Zettler Magnetics, Inc. offers a
variety of solutions for this type of component up to
hundreds of amperes sensed, at 50-400 Hz.

17
 Custom Designs

Custom designs are our specialty! Let our highly experienced design engineers
assist you in designing a transformer that is custom tailored to fit your next project
application.
Zettler Magnetics, Inc. has many years of transformer experience. As a result, our
engineering staff has the expertise it takes to find solutions to our customers’
specialized transformer applications. Whether you need to slightly alter one of our standard
products or completely custom design a transformer to support your
electrical demands, our engineers are ready to provide the answers to your custom
transformer requirements.
At Zettler Magnetics, Inc, we offer many different styles of custom designs. The following
categories are just a few of the types of custom transformers that we produce. If you don’t
see a style below that fits your application, contact us direct to
discuss your special transformer needs.

Custom Power Transformers

Custom designed power transformers for one or three
phases, low to high power, frequencies of 50, 60 and 400 Hz
based on customer specifications.

Switch Mode Transformers

Suitable for converter inverters, computers, telecommun-
ications, switching power supplies, EL driver modules, etc.

18
Custom Designs Inquiry

19
 Technical Notes

Applying this table to our hypothetical power supply the The transformer secondary rating is 28 VCT @ 180mA
transformer current can be approximated as: rms. A possible Zettler Magnetics, Inc. solution would
be p/n: AH40028.
For a Full-Wave Center Tap 1.2 x 0.35 = 0.42 A or To be safe, a precautionary calculation covering the
For a Full-Wave Bridge 1.8 x 0.35 = 0.63 A potential increase in voltage at the filter capacitor (into
the regulator) caused by a high line condition needs to be
The final transformer specification would then be: made. If a potential high line voltage of 130 VAC is
assumed then the transformer output (compared to low
For a Full-Wave center tap application line) would rise by the ratio of 130/95. The following
Secondary rating: 28 VCT @ 0.42 A recalculation would then apply:
Approx. transformer power rating: 12 VA
Possible Zettler Magnetics, Inc. p/n: AH50028 VAC = ( 10 + 3 + 0.7 + 1.0 ) x 130 x 1 = 15.8V
0.9 95 √ 2
For a Full-Wave bridge application The increase in the output must be absorbed by the
Secondary rating: 14.6 V @ 0.63 A regulator, which results in higher regulator power
Approx. transformer power rating: 9 VA dissipation. The illustrated values are safe for a typical IC
Possible Zettler Magnetics, Inc. p/n: AH50028 regulator but should be checked in any specific
application.
Dual Complementary supplies Load Regulation
Another common power supply is the Dual Thus far all calculations were performed with the
Complementary design as shown below. assumption that a full load was applied. Since actual
transformers are not ideal devices, variation in loading
may cause problems with the transformer's internal
VAC +15 impedance. In other words, if the load should be light
REG
+ + during a high line condition then there will be an
C C
COMMON additional rise in the secondary voltage beyond that due
+ +
to the rising line voltage. This is caused by the
C C decreasing voltage drop in the transformer windings.
REG Most smaller transformers (10 VA or less) provide a
-15
Dual Complementary power supply
load regulation of about 20%. The transformer will exhibit
a no-load voltage about 20% higher than at full rated
load. This factor must be taken into account when
One last example concerning the Dual Complementary calculating the maximum VAC ( and voltage drop into the
supply will be shown. In this example we will be selecting regulator ) with low load currents.
a transformer to be used on a Dual Complementary Due to inherent transformer characteristics, regulation
supply with a design voltage of ±10 V @ 100 mA DC. The will vary inversely with size (or VA rating). In larger
calculations are as follows: transformers, size is determined primarily by the heat
generated by internal losses while in smaller designs,
VOUT = ±10 V size is determined by the maximum permissible no-load
to full-load regulation.
VRECT = 0.7 V It is our hope that this brief summary of power supply
VREG = 3 V design and transformer selection will aid you in designing
your next project. If there are other questions regarding
VRIPPLE = 1.0 V transformer design and applications please feel free to
VAC = ( 10 + 3 + 0.7 + 1.0 ) x 115 x 1 = 14V call Zettler Magnetics, Inc. at 1-949-360-5838.
0.9 95 √ 2 References: Colonel Wm. T. McLyman,Transformer and Inductor Design Handbook,
IAC = 1.8 x 100 mA = 180 mA rms 1988, Marcel Dekker, Inc.
Eric Lowden, Practical Transformer Design Handbook, 2nd Edition, 1989, McGraw Hill

20
 Technical Notes

Therefore a center tap configuration is usually preferred This equation can be illustrated in the following
in low voltage supply applications. hypothetical example for a power supply requiring a 10
VDC output at 0.1 Amp. The power supply input is a
nominal 115 VAC @ 50/60 Hz but must operate down to
an input of 95 V rms. In this example the following
+ conditions would then apply:
C
Full-Wave bridge VOUT = 10 V
The dual complementary rectifier is a combination of VREG = 3 V
two full-wave center tap circuits and is a very efficient VRECT = 0.7 V
method of obtaining two identical outputs of reversed
polarity. Since a common ground is shared it is also VRIPPLE = 1.0
called a center tap bridge rectifier. VAC = 14.7 x 115 x 1 = 14 VAC
0.9 95 √ 2

From the above result it can now be seen that the

C
+ transformer secondary voltage can be specified as
28VCT (center tap). For a bridge rectifier of the same
+ output requirements, only the following would change:
Dual Complementary C
rectifier VRECT = 2 x 0.7 = 1.4 V

The full-wave center tap rectifier is the most common Therefore, VAC is now calculated as:
selection for moderate power applications in regulated
DC power supplies. Standard assumptions with this VAC = 15.4 x 115 x 1 = 14.6 VAC
configuration are as follows and relate to the diagram 0.9 95 √ 2
below. The transformer secondary voltage is now 14.6 V.

VRECT VREG
Transformer Secondary Current
VRIPPLE The final step is determining the transformer rms
REG
VAC secondary current. Although this value is properly
+ + VOUT
VAC C C
DC
derived by the use of complex analysis, there are rule-of-
thumb approximations that quickly provide values for
expedient design. These approximations are shown in
Full-Wave center tap the chart below.

1. VREG is approximately 3 volts DC or greater. Rectifier Filter Required rms

2. VRECT is approximately 0.7 volts DC. Type Type* Secondary Current
3. VRIPPLE is approximately 10% VDC peak. Rating
Full-Wave Choke Input 0.7 x DC Current
The following formula may be used for calculating the Center Tap
secondary voltage of the transformer:
Full-Wave Capacitor 1.2 x DC Current
VAC = VOUT + VREG + VRECT + VRIPPLE x VNOM x 1 Center Tap Input
0.9 VLOWLINE √ 2
where: 0.9 = typical rectifier efficiency Full-Wave Choke Input DC Current
Bridge
and VNOM is the ratio of the nominal AC line voltage to the
VLOWLINE required low line conditions. Full-Wave Capacitor 1.8 x DC Current
Bridge Input
*Note: Although choke input filters are not included in the above discussion
they have been included in the above table for reference purposes

21
 Technical Notes

Specifying
Specifying PowerTransformers
Power Transformers
Introduction
The conversion process in power electronics requires 1. Half-Wave (single diode)
the use of transformers; components that are frequently 2. Full-Wave center tap (two diodes)
the heaviest and bulkiest items in the conversion circuitry. 3. Full-Wave bridge (four diodes)
They also have a significant effect upon the overall 4. Dual Complementary supply, also known as a
performance and efficiency of the system. Accordingly, Full-Wave center tap (four diodes)
the design of such transformers has an important
influence on overall system weight, power conversion Half-Wave Rectifiers
efficiency and cost. Because of the interdependence and The only advantages of a half-wave rectifier are its
interaction of parameters, judicious tradeoffs are simplicity and the cost savings of one less diode. Its
necessary to achieve design optimization. disadvantages are numerous:
One of the more common problems for the circuit 1. Extremely high current spikes are drawn during the
design engineer is the selection of power transformer capacitor charging interval (one current surge per cycle).
ratings for a particular DC power supply. The designer is This current is limited only by the effective impedance of
immediately faced with a number of rectifier circuits and the transformer and the rectifier. This surge must not be
filter variations. For the sake of simplicity, we will make too large or it will damage the rectifier. This short once-
certain assumptions which should be applicable to 99% per-cycle current spike also results in very high
of the design applications encountered. secondary rms currents.
2. The unidirectional DC current in the transformer
Filters secondary biases the transformer core with a component
The only filter design that we will be considering is the of DC flux density. As a result, more iron is needed to
capacitor input filter. Choke input filter designs will not be avoid core saturation.
considered for the following reasons: The only situation in which a half-wave recitfier should
1. The higher weight and cost of chokes. seriously be considered is in an application with very low
2. If a regulator is used, which is usually the case, it DC power levels of 1 watt or less.
can be assumed that sufficient extra ripple reduction will
be provided. A L-C section will therefore not be required. Full-Wave Rectifiers
Also, the regulator will improve output voltage regulation The rest of the single-phase recitifier circuits are of the
with load. full-wave variety. In these designs, secondary current
A disadvantage, however, of capacitive input filter surges occur twice-per-cycle so that they are of smaller
systems is caused by the discontinuous secondary magnitude and the fundamental ripple frequency is
current flow. Current is drawn in short, high amplitude double the supply frequency. In addition, all full-wave
pulses to replace the charge required by the filter rectifiers produce the basic rectified waveform.
capacitor which discharges into the load during diode off
time. This results in a higher effective rms value of Full-Wave center tap
transformer secondary current. The transformer average 1. Uses 1/2 of the secondary winding at a time.
VA rating is the same as a choke input filter design 2. Requires a center tap.
because the higher DC output voltage obtained at the 3. Utilizes 2 diodes.
capacitor compensates for this effect. An advantage to
using a capacitor input filter is that, with the exception of Full-Wave bridge
very high current, standard diodes will handle most of the 1. Uses the entire secondary winding continuously.
peak or surge current requirements of a capacitive filter 2. No center tap required.
design. 3. Utilizes 4 diodes.
From the above it can be seen that selecting which
Rectifier Circuits full-wave rectifier to use is a question of tradeoffs. The
The other design consideration is that of a rectifier bridge rectifier has the best transformer utilization but
circuit configuration. The most common single phase requires the use of 4 diodes. The extra diodes result in
circuits are: double the voltage drop as that in a center tap circuit.

22
Sealed Transformers

23
ZETTLER Magnetics, Inc.
75 Columbia, Aliso Viejo CA 92656
Tel: 949-360-5838
Fax: 949-360-5839
sales@zettlermagnetics.com
www.zettlermagnetics.com

Rev 4/27/07