• 400W
  • Dimension: D150 X W140 X H86mm
  • ATX 12V / EPS 12V
  • Cooling: 80mm FAN x1
  • Temperature range: Operation 0 ˚C ~ 50 ˚C

EJ-400E01 400W PS2 ATX Switching Power Supply Description

The EJ-400E01 400W PS2 ATX Switching Power Supply is an industrial grade ATX switching power supplies. This high efficiency power supply features thermal fan speed control, Active PFC, and triple circuit protection and are designed to fit perfectly into your Tower Case, Server Case or 4U Rackmount chassis.

AC Input
Watt: 400W
Input Voltage: 115~230V.
Efficiency: 80% minimum under the load conditions defined in below table and 115Vac input.
Power Factor: >0.9 at full load
Input Current: 115Vac / 8.0A max. 230Vac / 4.0A max
Inrush Current: 55A max. when AC input 115Vac at 25˚C cold start.
110A max. when AC input 230Vac at 25˚C cold start.
Input Frequency: 47Hz~63 Hz.
Leakage Current: 3.5mA max.

Power Good Signal: 100ms~500ms, TTL compatible signal
Power Fail Delay: >1msec. ,TTL compatible signal
PS-ON: Power off:PS-ON = 2V min. ;Power on:PS-ON = 0.8V max.

Operating Temperature: 0˚C to 50˚C
Storage Temperature: -20˚C to +70˚C
Operating Humidity: 20% to 90%,non-condensing
Storage Humidity: 5% to 95%, non-condensing

Safety & EMI/RFI
Safety Standards: UL,cUL,TUV,CB
EMI/RFI Standards: CISPR22(EN55022) Class A, FCC Part15 Class A

MTBF: Over 100,000 hours at 25 Deg C
Coolings: 8 cm DC Fan
Dimension(DxWxH): 150 x 140 x 86 mm

DC Outputs

      Voltage +5V +3.3V +12V1 +12V2 -12V +5Vsb
(*1) Max load 20A 20A 15A 15A 0.8A 2.5A
      Min load 0.5A 0.3A 0.3A 0.5A 0.0A 0.0A
      Peak load 16A 16A 3.0A
Regulation +5,-5% +5,-5% +5,-5% +5,-5% +10,-10% +5,-5%
(*2) Ripple & Noise 50mV 50mV 120mV 120mV 120mV 50mV


*1: The continuous total output power is 400W max.
The combined power of +5V and +3.3V is 130W max.
Peak currents may last up to 12 seconds with not more than one occurrence per minute.
*2: Add 0.1uF and 10uF capacitors across output terminal during ripple & noise test.