DC/DC Converter

URA_LD-30WR3 & URB_LD-30WR3 Series

30W isolated DC-DC converter FEATURES

Ultra-wide input and regulated dual/single output
 Ultra-wide 4:1 input voltage range
 High efficiency up to 90% with full load
 High efficiency up to 82% with 5% load
 No-load power consumption as low as
0.14W
 I/O isolation test voltage 1.5k VDC
 Input under-voltage protection, output
short- circuit, over-voltage, over-current
protection
 Operating ambient temperature range:
-40℃ to +80℃
 Meets CISPR32/EN55032 CLASS A without
extra components
 Six-sided metal shielded package
 Input reverse polarity protection available
with chassis(A2S ) or Din-Rail mounting (A4S)
version

CB Report Patent ProtectionRoHS

UL60950-1 EN62368-1 BS EN62368-1 IEC60950-1

URA_LD-30WR3 & URB_LD-30WR3 series of isolated 30W DC-DC converter products with an ultra-wide 4:1 input voltage and feature
efficiencies of up to 90%, input to output isolation is tested with 1500VDC and the converters safely operate ambient temperature of -40℃
to +80℃, input under-voltage protection, output short-circuit, over-voltage, over-current protection. They meet CLASS A of
CISPR32/EN55032 EMI standards without external components, optional packages are offered for chassis or DIN-rail mounting (A2S, A4S),
adding additional input reverse polarity protection and they are widely used in applications such as data transmission device, battery
power supply device, telecommunication device, distributed power supply system, hybrid module system, remote control system, industrial
robot and railway fields.

Selection Guide
Input Voltage (VDC) Output Full Load Capacitive
Certification Part No. Efficiency Load
① ④ ⑤
Nominal Current (mA)
②

Max. Voltage (VDC)

③

(Range) Max./Min. (%) Min./Typ. (µF)Max.

URB2403LD-30WR3 3.3 6000/0 83/85 10000
URB2405LD-30WR3 5 6000/0 84/86 10000
UL/EN/BS URB2409LD-30WR3 9 3333/0 86/88 4700
EN/IEC URB2412LD-30WR3 12 2500/0 88/90 2700
URB2415LD-30WR3 24 15 2000/0 88/90 1680
40
URB2424LD-30WR3 (9-36) 24 1250/0 88/90 680
URA2405LD-30WR3 ±5 ±3000/0 84/86 2000
URA2412LD-30WR3 ±12 ±1250/0 87/89 1250
EN
URA2415LD-30WR3 ±15 ±1000/0 87/89 680
URA2424LD-30WR3 ±24 ±625/0 87/89 470
URB4803LD-30WR3 3.3 6000/0 84/86 10000
URB4805LD-30WR3 5 6000/0 85/87 10000
UL/EN/BS
URB4812LD-30WR3 12 2500/0 86/88 2700
EN/IEC
URB4815LD-30WR3 48 15 2000/0 87/89 1680
80
URB4824LD-30WR3 (18-75) 24 1250/0 85/87 680
URA4805LD-30WR3 ±5 ±3000/0 84/86 2000
EN URA4812LD-30WR3 ±12 ±1250/0 86/88 1250
URA4815LD-30WR3 ±15 ±1000/0 86/88 680
Notes：
①Use “H” suffix for heat sink mounting, “A2S” suffix for chassis mounting and “A4S” suffix for DIN-Rail mounting. We recommend to choose modules with a heat
sink for enhanced heat dissipation and applications with extreme temperature requirements;

2022.08.01-B/6 Page 1 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

②The minimum input voltage and starting voltage of A2S and A4S Model are 1VDC higher than those of DIP package due to input reverse polarity protection
function;
③Exceeding the maximum input voltage may cause permanent damage;
④Efficiency is measured at nominal input voltage and rated output load; efficiencies for A2S and A4S Model’s is decreased by 2% due to the input reverse
polarity protection circuit;
⑤The specified maximum capacitive load for positive and negative output is identical.

Input Specifications
Item Operating Conditions Min. Typ. Max. Unit
3.3V output -- 971/60 994/100
24VDC nominal input series,
5V output -- 1453/60 1488/100
nominal input voltage
Input Current (full load / Others -- 1420/6 1488/16
no-load) 3.3V output -- 480/20 491/30 mA
48VDC nominal input series,
5V output -- 718/20 735/35
nominal input voltage
Others -- 710/5 744/10
Reflected Ripple Current Nominal input voltage -- 40 --
24VDC nominal input series -0.7 -- 50
Surge Voltage (1sec. max.)
48VDC nominal input series -0.7 -- 100
24VDC nominal input series -- -- 9
Start-up Voltage VDC
48VDC nominal input series -- -- 18
24VDC nominal input series 5.5 6.5 --
Input Under-voltage Protection
48VDC nominal input series 12.0 15.5 --
Start-up Time Nominal input voltage & constant resistance load -- 10 -- ms
Input Filter Pi filter
Hot Plug Unavailable

Module on Ctrl pin open or pulled high (3.5-12VDC)

Ctrl * Module off Ctrl pin pulled low to GND (0-1.2VDC)

Input current when off -- 5 8 mA

Note: *The Ctrl pin voltage is referenced to input GND.

Output Specifications
Item Operating Conditions Min. Typ. Max. Unit
5%-100% load -- ±1 ±3
Voltage Accuracy
0%-5% load -- ±1 ±5

Input voltage variation from low to Vo1 -- ±0.2 ±0.5

Linear Regulation
high at full load Vo2 -- ±0.5 ±1 %
Vo1 -- ±0.5 ±1
Load Regulation 5%-100% load
①

Vo2 -- ±0.5 ±1.5

Dual output, Vo1 load at 50%, Vo2 load at range of
Cross Regulation -- -- ±5
10%-100%
Transient Recovery Time 25% load step change, nominal input voltage -- 300 500 µs

25% load step change, 3.3V/5V/±5V output -- ±5 ±8

Transient Response Deviation %
nominal input voltage Others -- ±3 ±5
Temperature Coefficient Full load -- -- ±0.03 %/℃

20MHz bandwidth, nominal input Singe output -- 50 100

Ripple & Noise② mVp-p
voltage, 100% load Dual output -- 50 150
Trim 90 -- 110
%Vo
Over-voltage Protection 110 -- 160
Input voltage range
Over-current Protection 110 -- 190 %Io
Short-circuit Protection Hiccup, continuous, self-recovery

2022.08.01-B/6 Page 2 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

Note:
①Load regulation for 0%-100% load is ±5%;
②The “parallel cable” method is used for ripple and noise test, please refer to DC-DC Converter Application Notes for specific information.

General Specifications
Item Operating Conditions Min. Typ. Max. Unit
Input-output Electric Strength test for 1 minute with a
Isolation 1500 -- -- VDC
leakage current of 1mA max.
Insulation Resistance Input-output resistance at 500VDC/60sec 1000 -- -- MΩ
Isolation Capacitance Input-output capacitance at 100kHz/0.1V -- 2000 -- pF
Operating Temperature See Fig. 1, Fig. 2, Fig. 3 and Fig. 4 -40 -- +80
℃
Storage Temperature -55 -- +125
Storage Humidity Non-condensing 5 -- 95 %RH
Pin Soldering Resistance
Soldering spot is 1.5mm away from case for 10 seconds -- -- +300 ℃
Temperature
Vibration IEC/EN61373 - Category 1, Grade B
Switching Frequency * PWM mode -- 300 -- kHz
MTBF MIL-HDBK-217F@25℃ 1000 -- -- k hours
Note:* Switching frequency is measured at full load. The module reduces the switching frequency for light load (below 50%) efficiency improvement.

Mechanical Specifications
Case Material Aluminum alloy
Horizontal package (without heat sink) 50.80 × 25.40 × 11.80 mm
Horizontal package (with heat sink) 51.40 × 26.20 × 16.50 mm
A2S chassis mounting (without heat sink) 76.00 × 31.50 × 21.20 mm
Dimensions
A2S chassis mounting (with heat sink) 76.00 × 31.50 × 25.30 mm
A4S Din-rail mounting (without heat sink) 76.00 × 31.50 × 25.80 mm
A4S Din-rail mounting (with heat sink) 76.00 × 31.50 × 29.90 mm
Without heat sink Horizontal package/A2S chassis mounting/A4S Din-rail mounting 27.8g/52.0g/72.0g(Typ.)
Weight
With heat sink Horizontal package/A2S chassis mounting/A4S Din-rail mounting 37.0g/60.0g/80.0g(Typ.)
Cooling Method Free air convection

Electromagnetic Compatibility (EMC)

CLASS A (without external components)/
Single output CISPR32/EN55032
CLASS B (see Fig.6-② for recommended circuit)
CE
CLASS A (without external components)/
Dual output CISPR32/EN55032
CLASS B (see Fig.7-② for recommended circuit)
Emissions
CLASS A (without external components)/
Single output CISPR32/EN55032
CLASS B (see Fig.6-② for recommended circuit)
RE
CLASS A (without external components)/
Dual output CISPR32/EN55032
CLASS B (see Fig.7-② for recommended circuit)
ESD IEC/EN61000-4-2 Contact ±4kV perf. Criteria B
RS IEC/EN61000-4-3 10V/m perf. Criteria A
Single output IEC/EN61000-4-4 ±2kV (see Fig.6-① for recommended circuit) perf. Criteria B
EFT
Immunity Dual output IEC/EN61000-4-4 ±2kV (see Fig.7-① for recommended circuit) perf. Criteria B
Single output IEC/EN61000-4-5 line to line ±2kV (see Fig.6-①for recommended circuit) perf. Criteria B
Surge
Dual output IEC/EN61000-4-5 line to line ±2kV (see Fig.7-①for recommended circuit) perf. Criteria B
Single output IEC/EN61000-4-6 3 Vr.m.s perf. Criteria A
CS
Dual output IEC/EN61000-4-6 10Vr.m.s perf. Criteria A

Electromagnetic Compatibility (EMC) (EN50155)

EN50121-3-2 150kHz-500kHz 99dBµV (see Fig.6-② for recommended circuit)
Single output
Emissions CE EN55016-2-1 500kHz-30MHz 93dBµV (see Fig.6-② for recommended circuit)
Dual output EN50121-3-2 150kHz-500kHz 99dBµV (see Fig.7-② for recommended circuit)

2022.08.01-B/6 Page 3 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

EN55016-2-1 500kHz-30MHz 93dBµV (see Fig.7-② for recommended circuit)

EN50121-3-2 30MHz-230MHz 40dBµV/m at 10m (see Fig.6-② for recommended circuit)
Emissions RE Single output
EN55016-2-1 230MHz-1GHz 47dBµV/m at 10m (see Fig.6-② for recommended circuit)
EN50121-3-2 30MHz-230MHz 40dBµV/m at 10m (see Fig.7-② for recommended circuit)
Emissions RE Dual output
EN55016-2-1 230MHz-1GHz 47dBµV/m at 10m (see Fig.7-② for recommended circuit)
ESD EN50121-3-2 Contact ±6kV/Air ±8kV perf. Criteria A
RS EN50121-3-2 20V/m perf. Criteria A
Single output EN50121-3-2 ±2kV 5/50ns 5kHz (see Fig.6-① for recommended circuit) perf. Criteria A
EFT
Immunity Dual output EN50121-3-2 ±2kV 5/50ns 5kHz (see Fig.7-① for recommended circuit) perf. Criteria A
Single output EN50121-3-2 line to line ±1kV (42Ω, 0.5µF) (see Fig.6-① for recommended circuit) perf. Criteria A
Surge
Dual output EN50121-3-2 line to line ±1kV (42Ω, 0.5µF) (see Fig.7-① for recommended circuit) perf. Criteria A
Single output EN50121-3-2 0.15MHz-80MHz 10V r.m.s perf. Criteria A
CS
Dual output EN50121-3-2 0.15MHz-80MHz 10V r.m.s perf. Criteria A

Typical Characteristic Curves

Fig. 1 Fig. 2
Applicable models: URA2405LD-30W(H)R3 (9-18V input voltage), Applicable models: URA2405LD-30W(H)R3 (18-36V input voltage),
URA2424LD-30W(H)R3 (9-18V input voltage), URA2424LD-30W(H)R3 (18-36V input voltage),
URA4805LD-30W(H)R3 (18-36V input voltage) URA4805LD-30W(H)R3 (36-75V input voltage),
URA2412LD-30W(H)R3, URA2415LD-30W(H)R3,
URA4812LD-30W(H)R3, URA4815LD-30W(H)R3

Fig. 3 Fig. 4
Applicable models: URB2403LD-30W(H)R3, URB2405LD-30W(H)R3, Applicable models: URB2409LD-30W(H)R3, URB2412LD-30W(H)R3,
URB4803LD-30W(H)R3, URB4805LD-30W(H)R3 URB2415LD-30W(H)R3, URB2424LD-30W(H)R3,
URB4812LD-30W(H)R3, URB4815LD-30W(H)R3,
URB4824LD-30W(H)R3

2022.08.01-B/6 Page 4 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

Design Reference
1. Typical application
All the DC/DC converters of this series are tested before delivery using the recommended circuit shown in Fig. 5.
Input and/or output ripple can be further reduced by appropriately increasing the input & output capacitor values Cin and Cout and/or by
selecting capacitors with a low ESR (equivalent series resistance). Also make sure that the capacitance is not exceeding the specified max.
capacitive load value of the product.
Dual
Vin +Vo
Cout
Cin DC DC 0V Single output Dual output
Cout Cin Cout Cin
Cout voltage voltage
GND (µF) (µF) (µF) (µF)
-Vo (VDC) (VDC)
Single 3.3/5/9 220 ±5/±12/±15 220
100 100
Vin +Vo 12/15/24 100 ±24 100
Cin DC DC Cout

GND 0V
Fig. 5
2. EMC compliance circuit
Parameter description:
Model Vin:24VDC Vin:48VDC
Choose according to actual input
FUSE
Single output: current
MOV S20K30 S14K60
C0 680µF/50V 330µF/100V
C1 330µF/50V 330µF/100V
C2 4.7µF/50V 2.2µF/100V
C3 Refer to the Cout in Fig.5
1mH, recommended to use
LCM
MORNSUN’s FL2D-30-102
Fig. 6 CY1/CY2 1nF/2kV
Notes: We use Part ① in Fig. 6 for immunity and part ② for emissions test.
Selecting based on needs.

2022.08.01-B/6 Page 5 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

Model Vin:24VDC Vin:48VDC

Dual output:
Choose according to actual input
FUSE
current
MOV S20K30 S14K60
C0 680µF/50V 330µF/100V
C1/C2 2.2µF/50V 2.2µF/100V
C3 330µF/50V 330µF/100V
Fig.7 C4 Refer to the Cout in Fig.5

Notes: We use Part ① in Fig. 7 for immunity and part ② for emissions test. LDM1 3.3µH
Selecting based on needs. CY1/CY2 2.2nF/400VAC Safety Y Capacitor

3. Trim Function for Output Voltage Adjustment (open if unused)

Vo’ Vo’ Calculating Trim resistor values:

aR 2 Vref
R1 up: R T = -R 3 a= R1
R3 R1 RT R 2 -a Vo’-Vref
V r ef Trim R3
V r ef Trim aR 1 Vo’-Vref
R2
down : R T = -R 3 a= R2
RT R 1 -a Vref
R2

RT= Trim Resistor value

0V 0V a= self-defined parameter
Trim up Trim down Vo’=desired output voltage

TRIM resistor connection (dashed line shows internal resistor network)

Vout(VDC) R1(kΩ) R2(kΩ) R3(kΩ) Vref(V)

3.3 4.801 2.87 12.4 1.24
5 2.883 2.87 10 2.5
9 7.500 2.87 15 2.5
12 11.000 2.87 15 2.5
15 14.494 2.87 15 2.5
24 24.872 2.87 17.8 2.5

4. The products do not support parallel connection of their output

5. For additional information please refer to DC-DC converter application notes on
www.mornsun-power.com

2022.08.01-B/6 Page 6 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

Horizontal Package (without heat sink) Dimensions and Recommended Layout

Horizontal Package (with heat sink) Dimensions

2022.08.01-B/6 Page 7 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

URA_LD-30WR3A2S & URB_LD-30WR3A2S(without heat sink) Dimensions

URA_LD-30WHR3A2S & URB_LD-30WHR3A2S(with heat sink) Dimensions

2022.08.01-B/6 Page 8 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

URA_LD-30WR3A4S & URB_LD-30WR3A4S(without heat sink) Dimensions

URA_LD-30WHR3A4S & URB_LD-30WHR3A4S(with heat sink) Dimensions

2022.08.01-B/6 Page 9 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation
DC/DC Converter
URA_LD-30WR3 & URB_LD-30WR3 Series

Notes:
1. For additional information on Product Packaging please refer to www.mornsun-power.com. Horizontal Packaging Bag Number:
58200035(without heat sink), 58200051(with heat sink), A2S/A4S Packaging Bag Number: 58220022;
2. The maximum capacitive load offered were tested at input voltage range and full load;
3. Unless otherwise specified, parameters in this datasheet were measured under the conditions of Ta=25℃, humidity<75%RH with nominal
input voltage and rated output load;
4. All index testing methods in this datasheet are based on company corporate standards;
5. We can provide product customization service, please contact our technicians directly for specific information;
6. Products are related to laws and regulations: see "Features" and "EMC";
7. Our products shall be classified according to ISO14001 and related environmental laws and regulations, and shall be handled by
qualified units.

Mornsun Guangzhou Science & Technology Co., Ltd.

Address: No. 5, Kehui St. 1, Kehui Development Center, Science Ave., Guangzhou Science City, Huangpu District, Guangzhou, P. R. China
Tel: 86-20-38601850 Fax: 86-20-38601272 E-mail: info@mornsun.cn www.mornsun-power.com

2022.08.01-B/6 Page 10 of 10
MORNSUN Guangzhou Science & Technology Co., Ltd. reserves the copyright and right of final interpretation