• 1U Size Design
  • Hot-Swappable & Power Sharing capability
  • Full Range AC input
  • Low Ripple Noise
  • High Power Density
  • High Performance industrial Fan
  • High Reliablity

1U Redundant 250W PSU R1J-250I1H2A0 Product Description

The 1U Redundant 250W PSU R1J-250I1H2A0 was designed for high capacity server storage applications. The horizontal 1+1 power module configuration includes hot-swap and power sharing features. Integrated with Active PFC, triple circuit protection, and EPS12V features, the 1U redundant power supply series provides performance and reliability at an affordable cost.

AC Input

  • Input Voltage:100~240VAC +/-10% / 47 ~ 63Hz
  • Input Current:4.0A(RMS) for 115VAC, 2.0A(RMS) for 230VAC.
  • Inrush Current:35A Max. for 115VAC Per Module, 70A Max. for 230VAC Per Module

Thermal Protection 
▪ The power supply shall go into thermal protection as the case temperature exceeds 86ºC(±5ºC)limit.
▪ The output shall recover only when the temperature becomes normal and AC power is turned on again

Other Protections

  • Over Power: 110% ~ 150% MAX.
  • Over Voltage: +3.3V→3.7V~4.1V ,+5V→5.7V~6.5V,+12V→13.2V~14.4V
  • Short Circuit: Shutdown And Latch Re-power ON


  • Power Good Signal: Delay 200ms~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.
  • TTL Signal: Normal(Power Supply On): Output Condition =3V Min. , 5.25VMax.
  • Failure(Power Supply Off): Output Condition =0V Min. ,1VMax
  • Current Sharing: ON +3.3V,+5V,+12V


  • Operating Temperature: 0°C to 45 °C
  • Storage Temperature: -20°C to +70°C
  • Operating Humidity: 5% to 95%, non-condensing
  • Storage Humidity: 20% to 90%, non-condensing

Safety & EMI/RFI

  • Safety Standards: TO MEET CUL UL, TUV
  • Withstand Voltage: I/P-O/P:1.5KVAC FOR 1 minute. I/P-FG:1.5KVAC For 1 minute
  • Isolation Resistance: I/P-O/P,I/P-FG,O/P-FG: 500VDC , 50M ohms min.


  • MTBF: Using MIL – HDBK -217F the calculated MTBF >100,000 hours at 25°C
  • Coolings: 40x40x20mm x 2pcs DC fans
  • Dimension(D x W x H): 260(D)X106(W)x41.5(H)mm


AC Output

Output Voltage Min. load Max. load Regulation LOAD LINE Output Ripple &
Noise Max.(p-p)
+5V 1A 20A 5% 1% 60mV
+3.3V 1A 20A 5% 1% 60mV
+12V 2A 20A 5% 1% 120mV
-12V 0A 0.5A 5% 1% 120mV
+5VSB 0.5A 2A 5% 1% 60mV


  • Efficiency: 75% Typical at full load.
  • Hold up Time: 1m sec Min. AT Full Load.
  • Rated Power: 1.+5V&+3.3V TOTAL OUTPUT MAX.:145W; 2.Power module Total output power not exceed 250W
20 + 4 pin
20+4 Pin P4 MB Peripheral FDD 8-Pin SATA
X 1 X 1 X 5 X 1 X 1 X 3