Wide Voltage Input 3KVDC Isolated Regulated Single Output Modular Power Supply WRF series products, the output has a self-recovery overload and short-circuit protection, and the voltage will not rise at no load. The VD / WRF / WRE series module power supply developed and produced by SunYuan Technology is a national patented product (National Patent No.: ZL 200420042857.1) with high electrical isolation and anti-surge, anti-static characteristics, and the output of the output has a self-recovery overload and short-circuit protection. Recently, this product has successfully passed the high isolation/anti-surge/anti-static test in the technical inspection related to the safety of the external RS485/RS232 interface of the power load management control terminal (user management terminal) instrument with high isolation (4500V) and anti-static (direct contact of the external terminal: 8000V). At present, it has been widely used in the power instrumentation manufacturing industry.

　　
      The VD / WRF series of DC-DC isolated modular power supplies are manufactured with the reliability process of ceramic substrate and printed resistors, which can meet the industrial grade vibration, humidity, static interference, wide temperature (-45-+85 ℃) and other harsh environments. The products are available in SIP single-row and DIP double-row packages. Main application areas: electrical equipment ground interference suppression, instrumentation external (RS485/RS232/RS422/USB/IEEE1394 and other communication interfaces) port power supply isolation and transformation, instrumentation shell interface terminal exposed metal parts of the security of high isolation/anti-surge/anti-static isolation (the national safety standards: more than 8KV).

Product Technical Parameters 

Input Voltage                      

5V/9V/12V/15V/24VDC   

Output Voltage 

3.3v/5v/9v/12v/15v/24vdc  

For other specifications, please contact Shunyuan Technology Co. 

Electrical Characteristics 

The following data are measured at TA=25° C, nominal input voltage, and rated output current unless otherwise noted.

Input Characteristics 

Voltage Range +/- 10%* nominal  

Filtering Ceramic Capacitors

Isolation Characteristics 

Rated Voltage 3000 VAC  

Leakage Current 1 mA   

Resistance 109Ohm  

Capacitance 60 pTYP

Output Characteristics  

Voltage Accuracy +/- 2%* nominal max. 

( 20 MHz BW) Ripple & Noise 50mV p-p, max.  

Short Circuit Time Long Term 

Linear Voltage Calibration +/- 1.2% / 1.0% of Vin 

Load Voltage Calibration +/- 8 %, load = 20 ~ 100

Temperature Coefficient +/- 0.02%/°C  

General Characteristics 

Efficiency 70% to 80   

Switching Frequency 80 - 125KHz  

Environmental Characteristics 

Operating temperature (ambient) - 40° C to + 85° C   

Storage temperature - 55 °C to + 125 °C   

Reduced nominal value See temperature characteristics graph 

Humidity ≤ 90%, uncompressed 

Cooling method Natural air cooling

Volume Characteristics

SIP package size 1W: 19,60 x 6,00 x 10,00 mm　

　　　　　　　　　　　　　　　   0,77 x 0,23 x 0,39 in.

　　　　　　　　　　　　　　　   2W: 19,60 x 7,00 x 10,00 mm 

　　　　　　　　　　　　　　　   0,77 x 0,28 x 0,39 in. 

DIP package size 1W/2W: 20,4 x 10,00 x 8,2 mm  

                                                       0,8 x 0,39 x 0,32 inches  

Weight 2.5 - 3.5 g  

Case Material Non-Conductive Flame Retardant Black Plastic

Model Number Example Input Voltage Range Output Voltage Output Current Efficiency

WRF0505S/D-1W 4.5 - 5.5VDC 5VDC 200mA 68%

WRF0512S/D-1W 4.5-5.5VDC 12VDC 84mA 72%

wrf1205s/d-1w 10.8-13.2vdc 5vdc 200ma 69

wrf2415s/d-1w 21.6-26.4vdc 15vdc 67mA 71%

wrf2405s/d-2w 21.6-26.4vdc 5vdc 400mA 68%

wrf2412s/d-2w 21.6-26.4vdc 12vdc 166mA 77%

Power Medical Instrumentation 3KV Isolated Regulated Short Circuit Protection Single Output Power Module: WRF-1W/2W Series