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48V to 5V6A 30W DC to DC isolated transfer input power supply module URB4805LD-30WR3

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Product Feature

UR(A)B_LD-30WR3 series product output power is 30W,4:1 wide voltage input range,efficiency up to 91%conversional isolation volatge of 1500VDC,allowable operating temperature is -40℃to+85℃, 

with input under-voltage protection, output over-voltage, over-current,short-circuit protection function, bare metal meets CISPR32/EN55032CLASSA , widely used in medical, industrial control, electri power, instrumentation,communication, railway and other fields.

  • Wide input voltage range(4:1),Output 30W 

  • Conversion efficiency91%(Typ

  • Isolation voltage 1500Vdc 

  • Ultra low power consumption:0.036W(Typ) 

  • Fast startup:1ms(Typ) 

  • Working temperature range-40°C~+85℃ 

  • Input undervoltage , output short circuit , overcurrentovervolatge protection 

  • Metal case,low output ripple 

  • International standard pins,PCB board in-line

Enviroment Condition

Project nameQualificationUnitNotes
Working enviroment temperature-40—+85
Storage temperture-40—+80 ℃
Relative humidity5—95%
Heat dissipation modenatural cooling

Atmospheric pressure80—106 KpaKpa
VibrateVibration coefficient 10~500Hz,2G10min./1cycle, 60min.each along X,Y,Z axes
Meet the requirements of secondary road transportation

Input Characteristics

Project nameWorking conditionsUnitNotes
Related input voltage48Vdc
Input voltage range18-75Vdc
Maximum input current≤1.45A
Reflected rippleNominal input voltage   40mA

DC 5V rated input voltage series

Impulse voltage≤100Vdc
Starting voltage18Vdc
Input undervoltage protection12-15.5Vdc
Start-up delay1msRated input voltage and constant resistance load
Input filter type
PI version
Hot plugged

Output Characteristics(5V/6000mA)

Project nameTechnical requirementUnitNotes
No load rated output voltage5V±2%Vdc
Short-time maximum output current≥6000mA
Rated output current5900mA
Voltage regulation±0.5%
Load regulation ±0.5%
Transfer efficiency Vin=5Vdc, output full load 90%
Output ripple and noise (mVp-p)Pure resistive load, 20MHz bandwidth, peak to peakmV
Output over-current protection
the maximum load 110-200% Vdc
Insulation voltageInput- output, test in 1 minute, leakage current less than 1mA/1500V-
Insulation resisitanceInput- output, insulation volaltge 500VDC/1000MΩ
Isolation capacitanceInput- output, 100KHz/0.1V 1000pF-


(1) For product model with output voltage ±5VDC or ±9VDC , the maximum output voltage accuracy is ±5% under 0% - 5% load condition 

(2) When tested according to the 0%-00% load working condition, the load adjustment rate is ±5% 

(3) 0%-5% load ripple & noise less than or equal to 5% Vo. Ripple and noise test method, Twisted pair test method, can add capacitive load at the output to reduce light load ripple

Typical Application Circuits


EMC parameter recommendation

Component No.24V Input Product 48V Input Product 110V Input Product 
FMSE FuseAccess the corresponding fuse accrding to customer needs
LDM1/Common mode inductance10mH15mH30mH
CO,C1 Ceramic capacitors100μF/50V100μF/100V100μF/200V
E1,E2 Electrolytic capacitor1μF/50V1μF/100V0.47μF/250V
LDM2/Differential mode inductance10μH15μH68μH
CY1/Y2 Capacitance1nF/250vAC


* Fuses and varistors are basic parts of protection circuits (required).

* If the certification is required, the safety capacitor and common mode inductance cannot be omitted.

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