BZW50

Datasheet

5 kW TVS

Features
• Peak pulse power:
– 5000 W (10/1000 µs)
• Stand off voltage range from 10 V to 180 V
• Unidirectional and bidirectional diode
• Low clamping factor
R6 • Fast response time
• UL497B, file number: QVGQ2.E136224

Description
Transil diodes provide high overvoltage protection by clamping action. Their
instantaneous response to transient overvoltages makes them particularly suited to
protect voltage sensitive devices such as MOS Technology and low voltage supplied
ICs.

Product status link

BZW50

DS0662 - Rev 6 - June 2018 www.st.com

For further information contact your local STMicroelectronics sales office.
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Characteristics

1 Characteristics

Table 1. Absolute maximum ratings (Tamb = 25 °C)

Symbol Parameter Value Unit

PPP Peak pulse power dissipation(1) 5000 W

P Power dissipation on infinite heatsink 6.5 W

IFSM Non repetitive surge peak forward current for unidirectional types 500 A

Tstg Storage temperature range -65 to +175 °C

Top Maximum operating junction temperature 175 °C

TL Maximum lead temperature for soldering during 10 s at 5 mm from case. 260 °C

1. For a surge greater than the maximum values, the diode will fail in short-circuit.

Table 2. Thermal resistance parameter

Symbol Parameter Value Unit

Rth(j-l) Junction to leads 15 °C/W

Rth(j-a) Junction to ambient on printed circuit. L lead = 10 mm 65 °C/W

Figure 1. Electrical characteristics (definitions)

I I

Symbol Parameter IF IPP

VRM Stand-off voltage Unidirectional

VBR Breakdown voltage

VCL Clamping voltage IR
VCL VBR VRM VF
IRM Leakage current @ VRM V VCLVBR VRM IRM V
IPP Peak pulse current IRM IRM VRMVBR VCL
IR IR
αT Voltage temperature coefficient
VF Forward voltage drop
RD Dynamic resistance IPP IPP
Bidirectional

Figure 2. Pulse definition for electrical characteristics

DS0662 - Rev 6 page 2/10

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Characteristics

Table 3. Electrical characteristics - values (Tamb = 25 °C)

IRM @ VRM VCL @ IPP VCL @ IPP 8/20 µs

Order code VBR @ IR(1) min. αT(2) C(3)typ.
max. 10/1000 µs max. max.

Unidirectional Bidirectional µA V V mA V A V A 10-4/°C pF

BZW50-10 BZW50-10B 5 10 11.1 1 18.8 266 23.4 2564 7.8 24000

BZW50-12 BZW50-12B 5 12 13.3 1 22 227 28 2143 8.4 18500
BZW50-15 BZW50-15B 5 15 16.6 1 26.9 186 35 1714 8.8 13500
BZW50-18 BZW50-18B 5 18 20 1 32.2 155 41.5 1446 9.2 11500
BZW50-22 BZW50-22B 5 22 24.4 1 39.4 127 51 1177 9.6 8500
BZW50-27 BZW50-27B 5 27 30 1 48.3 103 62 968 9.8 7000
BZW50-33 BZW50-33B 5 33 36.6 1 59 85 76 789 10 5750
BZW50-39 BZW50-39B 5 39 43.3 1 69.4 72 90 667 10.1 4800
BZW50-47 BZW50-47B 5 47 52 1 83.2 60.1 108 556 10.3 4100
BZW50-56 BZW50-56B 5 56 62.2 1 99.6 50 129 465 10.4 3400
BZW50-68 BZW50-68B 5 68 75.6 1 121 41 157 382 10.5 3000
BZW50-82 BZW50-82B 5 82 91 1 145 34 189 317 10.6 2600
BZW50-100 BZW50-100B 5 100 111 1 179 28 228 263 10.7 2300
BZW50-120 BZW50-120B 5 120 133 1 215 23 274 219 10.8 1900
BZW50-150 BZW50-150B 5 150 166 1 269 19 343 175 10.8 1700
BZW50-180 BZW50-180B 5 180 200 1 322 16 410 146 10.8 1500

1. Pulse test: tp < 50 ms.

2. To calculate VBR versus Tj: VBR at TJ = VBR at 25 °C x (1 + αT x (Tj - 25))
3. VR = 0 V, F = 1 MHz. For bidirectional types, capacitance value is divided by 2.

DS0662 - Rev 6 page 3/10

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Characteristics (curves)

1.1 Characteristics (curves)

Figure 3. Peak power dissipation vs. initial junction Figure 4. Peak pulse power versus exponential pulse
temperature (printed circuit board) duration
% P p p(W)
1E7
100 T j initial(°C)

1E6
80

1E5
60

1E4
40

20 1E3

T initial (°C)
j tp(ms)EXPO.
0 1E2
0 20 40 60 80 100 120 140 160 180 200 0.001 0.01 0.1 1.0 10 100

Figure 6. Capacitance vs. reverse applied voltage for

Figure 5. Clamping voltage vs. peak pulse current
unidirectional types (typical values)
V CL(V)
1000 %I pp C( nF)
10 0 T j initial(°C )
100
50
Tj = 25 °C
F = 1 MHz
BZ W5 0-180 0 t B ZW 5
tr tp
t<r 10 s 0 - 10
10 B Z W5
BZ W5 0- 82 0 -18
10 0 B Z W5
0 -3 9
BZ W5 0- 39
82 B Z W5
0 -8 2
1
BZ W5 0- 18
12
B Z W5
0 -1 8 0
BZ W5 0- 10
12
Ipp( A)
10 VR (V)
0.1 1.0 10 100 100
00 100
000 0.1
11 01 00 50 0

Note: The curves in Figure 5. Clamping voltage vs. peak pulse current are specified for a junction temperature of 25
°C before surge. The given results may be extrapolated for other junction temperatures by using the following
formula: ΔVBR = αT x [Tamb -25] x VBR(25 °C). For intermediate voltages, extrapolate the given results.

DS0662 - Rev 6 page 4/10

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Characteristics (curves)

Figure 7. Capacitance vs. reverse applied voltage for Figure 8. Peak forward voltage drop vs. peak forward
bidirectional types (typical values) current for unidirectional types (typical value)
C( nF) IFM(A)
100 100
Tj = 25 °C
F = 1 MHz Tj initial 25 °C

B Z W5
0 -1 0B
10
B Z W5 Tj initial 150 °C
0 -1 8B
B Z W5 10
0 -3 9B
B Z W 5 0 -8
1 2B

B Z W5
0- 1 8 0B
VFM (V)
VR (V) 1
0.1
1 10 100 500 1 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

Note: For Figure 8. Peak forward voltage drop vs. peak forward current for unidirectional types (typical value), multiply
by 2 for units with VBR > 220 V.

Figure 9. Transient thermal impedance junction to Figure 10. Relative variation of leakage current vs.
ambient vs. pulse duration junction temperature
Zth (j-a) (°C/W) IR (Tj)
100 IR (Tj = 25 °C)
5E+3

1E+3 VR = VRM

1E+2

10
1E+1

1E+0

tp (s) Tj (25°C)
1 1E-1
0.01 0.1 1 10 100 1000 0 25 50 75 100 125 150

DS0662 - Rev 6 page 5/10

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Package information

2 Package information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK®
packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions
and product status are available at: www.st.com. ECOPACK® is an ST trademark.

2.1 R6 package information

Figure 11. R6 package outline

B A B

ØD
ØC

Table 4. R6 package mechanical data

Dimensions

Ref. Millimeters Inches

Min. Typ. Max. Typ. Max.

A 8.6 - 9.1 0.338 - 0.358

B 25.4 - 1 -
C 8.6 - 9.1 0.338 - 0.358
D 1.20 - 1.30 0.047 - 0.051

DS0662 - Rev 6 page 6/10

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R6 package information

Table 5. Marking

Unidirectional order code Marking Bidirectional order code Marking

BZW50-10 BZW50-10 BZW50-10B BZW50-10B

BZW50-12 BZW50-12 BZW50-12B BZW50-12B
BZW50-15 BZW50-15 BZW50-15B BZW50-15B
BZW50-18 BZW50-18 BZW50-18B BZW50-18B
BZW50-22 BZW50-22 BZW50-22B BZW50-22B
BZW50-27 BZW50-27 BZW50-27B BZW50-27B
BZW50-33 BZW50-33 BZW50-33B BZW50-33B
BZW50-39 BZW50-39 BZW50-39B BZW50-39B
BZW50-47 BZW50-47 BZW50-47B BZW50-47B
BZW50-56 BZW50-56 BZW50-56B BZW50-56B
BZW50-68 BZW50-68 BZW50-68B BZW50-68B
BZW50-82 BZW50-82 BZW50-82B BZW50-82B
BZW50-100 BZW50-100 BZW50-100B BZW50-100B
BZW50-120 BZW50-120 BZW50-120B BZW50-120B
BZW50-150 BZW50-150 BZW50-150B BZW50-150B
BZW50-180 BZW50-180 BZW50-180B BZW50-180B

DS0662 - Rev 6 page 7/10

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Ordering information

3 Ordering information

Figure 12. Ordering information scheme

BZW 50 10 CA RL

Transil

Peak pulse power

50 = 5000 W
Breakdown voltage
100 = 100 V
Types
A = Unidirectional
CA = Bidirectional
Packaging
Blank = Ammopack tape
RL = Tape and reel

Table 6. Ordering information

Order code Marking Package Weight Base qty. Delivery mode

BZW50xxxx
1000 Ammopack
BZW50xxxxB
See Table 5. Marking R6 2.050 g
BZW50xxxxRL
100 Tape and reel
BZW50xxxxBRL

1. Logo, date code, type code, cathode band (for unidirectional types only).

DS0662 - Rev 6 page 8/10

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Revision history

Table 7. Document revision history

Date Revision Changes

Feb-2003 1 Last update.

14-Dec-2012 2 Updated ECOPACK statement.
Updated tittle description. Updated Figure 2. Pulse definition for electrical characteristics
25-May-2018 3
and Figure 12. Ordering information scheme.

DS0662 - Rev 6 page 9/10

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DS0662 - Rev 6 page 10/10