280 Watt AC-DC Power Supplies

Product Information

RD-280P Series are Single Output 280 Watt AC-DC Power Supplies, available in an open PCB or U-Channel format.

RD-280P series 280 watt AC-DC Power Supplies have Universal AC Input from 90-264VAC with outputs of 12V, 24V, 28V, 36V, 48V and 54V.  They also include a 5V @ 0.5A standby supply and a 12V @ 0.3A fan supply, making them easier to integrate into OEM applications that require forced cooling.  Up to 210W is available with free air convection.

RD-280P series 280 watt AC-DC Power Supplies have approvals to UL/c-UL/EN 60950-1, UL/c-UL/EN62368-1, UL/EN/60601-1 Ed. 3.1, CB IEC 60950-1 & CB IEC 62368-1 standards, offer Class B line emissions and will operate over a wide 0°C to +70°C ambient temperature range.


Features and Options
  • 280 Watts in 3” x 5” PCB Footprint
  • Full Medical & ITE Approvals
  • Medical Body Floating (BF) rated, MOPP Type
  • Main output and Standby output power ON LED indicators
Voltage Range 90-264VAC
Frequency 47-63Hz
Power Factor @ full load >0.95 @115VAC,
>0.90 @230VAC
Current, RMS <3.5A @115VAC
<2.0A @ 230VAC
Inrush Current, cold start @ 25°C <30A Peak @ 115VAC
<60A Peak @ 230VAC
EMI Filter EN55022 Curve B, FCC20780 pt. 15J Curve B
Protection Internal Fuse
Leakage Current <100μA @ 264VAC
Total Output Power, Continuous, Max see model table
Total Regulation 12V & 24V: ±3%
28V, 36V, 48V & 54V: ±2%
Ripple & Noise, Pk-Pk see datasheet
Holdup Time, full load @ 115VAC >10mS
Minimum Load 0A
Overload Protection 105-150% Full Load, Auto Recovery
Overvoltage Protection Shutdown, Latch off
Short Circuit Protection Auto Recovery
5Vsb meets ErP 0.5W @ No load
Remote control ( Inhibit ) function
Efficiency >91% typical at Full Load, 230VAC
MTBF >200,000 Hours per Telcordia
EMC / CE EN60601-1-2, EN55024, EN 55011 Class B
EN55022 Class B, FCC Part 15 Class B, FCC Part 18 Class B
Safety Standards Medical: UL60601-1 Ed. 3.1, CSA22.2 No.60601-1 Ed. 3.1, EN60601-1 Ed. 3.1.
ITE: UL/c-UL/IEC62368-1, CB IEC 60950-1/62368-1.
Operating Temp. Range -20°C to 70°C Ambient
Derating Open PCB: 2.5%/°C, 51°C to 70°C
U-Channel: 2.5%/°C, 41°C to 70°C
Storage Temp. Range -20°C to + 85°C
Humidity 0% to 95%, Non-Condensing
Cooling Natural Convection or Forced Air
Format Open PCB or U-Channel
Dimensions, inches (mm)

Open PCB: 5.00 (127.0) L x 3.00 (76.2) W x 1.18 (30.0) H
U-Channel: 5.00 (127.0) L x 3.28 (83.2) W x 1.5 (38.0) H

Weight Open PCB: 0.775lbs (0.35kg)
U-Channel: 1.05lbs (0.475kg)
Model Number


Output Current Standby
RD-280P-S12z 12V 17.5A 23.33A 5V @ 0.5A 12V @ 0.3A
RD-280P-S24z 24V 8.75A 11.66A 5V @ 0.5A 12V @ 0.3A
RD-280P-S28z 28V 7.5A 10.0A 5V @ 0.5A 12V @ 0.3A
RD-280P-S48z 36V 5.83A 7.77A 5V @ 0.5A 12V @ 0.3A
RD-280P-S48z 48V 4.375A 5.83A 5V @ 0.5A 12V @ 0.3A
RD-280P-S54z 54V 3.88A 5.148A 5V @ 0.5A 12V @ 0.3A

Output connector options:
z=T ( Terminal block type, pitch 8.25mm): Suitable for all voltages.
z=M ( Mini-fit type, pitch 4.2mm)
z=blank ( Connector type, pitch=3.96mm ): Suitable for 24V up.

All models have total power 210W Max. convection or 280W Max. forced air cooling.

For U-Channel version add -U to the end of the model number. Convection rating reduced to 200W Max.

CALL: +1-954-905-1070

EMAIL: the.power.solution@unipowerco.com