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Nipron's Unique Primary Redundant Power Supply
 pNSP2U-550P-AAS • Much higher efficiency, reliability and less temp.rise than existing redundant power supply with our unique patented technology
• 550W large-capacity power supply to meet SSI-ERP2U specifications (including the operatioin with single unit)
• Output connector method responding to a variety of connector types
• Power delivery ratio between two input units controlled by external signal
• With a primary unit combined, higher safety or economic efficiency is selectable.
See more details Continuous

* Output harnesses are optional.
* DC input unit development is on its way.

*Please use Metric Screw Threads, ("M3" screws) for PSU mounting.(Inch Screw Threads cannot be used.)
Function :For description of function, click each icon
DC Startup uncomplianceRS232C uncomplianceTTL complianceSilent uncomplianceRoHS Directive complianceConnection compliancePFC complianceLead-free compliance5VSBFAN uncomplianceTSFCFAN uncomplianceUSB uncompliance
Output specification
Output specification ,Continuous 427.6W,Peak Capacity 550W
Output connector: For description of function, click each icon
Output connector for ATX Mother Board compliance ATX 12V ver. 2.0 or later power supply with SSI power connector complianceATX20+4Pin uncomplianceAT motherboard output connector uncomplianceATX Motherboard Auxiliary Connector uncomplianceProcessor connector for ATX motherboard complianceProcessor Connector for SSI Motherboard compliancePCI-Express uncompliancePCI-E 8Pin uncompliancePeripheral connector complianceConnector compliant with the S-ATA (Serial ATA) standard complianceConnectors for FDDs compliance
Standard, specifications: For standard and specifications, click each item.
Compatible case size ERP2U
Outline drawing 108Wx83.8Hx400D
Weight 4.60 kg typ
Input Voltage AC 85-264V
DC DC unit under development
Efficiency AC 74% typical at AC 100V and 77% typical at AC 240V
Power factor 99% typical at AC 100V and 98% typical at AC 240V
Input changeover system Worldwide
AC, DC input Available (with another unit of DC)
Safety UL60950, CSA60950(c-UL)
High frequency current regulation Compliant with IEC61000-3-2(Ver. 2.1) Class D
EMI standard
(Input feedback noise)
Compliant with VCCI Class A FCC Rules Class A and EN55022 Class A
CE marking
EMS immunity Electrostatic discharge to meet EN61000-4-2
Radioactive radio-frequency electromagnetic field to meet EN61000-4-3
Fast transient burst to meet EN61000-4-4
Lightning surge immunity to meet EN61000-4-5
Conductive radio frequency electromagnetic field to meet EN61000-4-6
Power frequency magnetic field immunity to meet EN61000-4-8
Voltage dips and fluctuation to meet EN61000-4-11
Operating temperature 0 to 40 degrees C with full load, and, to 60 degrees C with 60% of load
Leakage current 0.5mA max. at AC100V and 1mA max. at AC240V per one unit
Cooling systems Forced air cooling
Insulation AC 1500V/min. between AC input and DC-output/FG and between AC inputs
Output ground connection Connected to chassis
Signal unit
Warranty Three years after delivery, however, if defects belong to us, the defective unit shall be repaired or replaced at our cost.
Accessory (Optional)
WH-M2024-500 20-Pin Mother Board Harness
WH-M2424-500 24-Pin Harness for Motherboard
WH-PP610-850 Peripheral Connector Harness(Peripheral*5 FDD*1)
WH-PS610-850 Peripheral Connector HarnessPeripheral Connector Harness(Peripheral*3 S-ATA*2 FDD*1)
WH-V0408-500 +12V Power Connector Harness (4P)
WH-V0808-500 +12V Power Connector Harness (8P)
WH2753(PS2753) AC Power Cable(PSE)
Download Product and Technical Information
Instruction Manual Test data Product catalogue product specification