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3. Key Technical Specifications
| Parameter | Specification |
| Manufacturer | FSP Group |
| Part Number | FSP400-60PFI |
| Max Output Power | 400 W total continuous output |
| Input Voltage Range | 100 to 240 V AC full range (90–264 V AC operational boundary) |
| Input Frequency | 47 Hz to 63 Hz |
| Input Current | 6.3 A @ 115 V AC / 3.0 A @ 230 V AC |
| Main DC Voltage Rails | +3.3 V, +5 V, +12 V, -12 V, -5 V (legacy), +5 VSB |
| Power Factor Correction | Active PFC integrated circuit |
| Protections | Output Over Voltage Protection (OVP), Short Circuit Protection (SCP), Resettable power shutdown |
| Cooling System | Internal 12 V DC forced-air fan |
| Operating Temperature | 0 °C to +40 °C (32 °F to 104 °F) |
| MTBF | >50,000 hours continuous operation @ 25 °C |
4. Product Introduction & Supply Chain Strategy
The FSP Group FSP400-60PFI serves as an industrial-grade, 400-watt switching power supply designed for legacy industrial automation racks, embedded control PCs, human-machine interface (HMI) workstations, and enterprise communications hardware. Engineering units select this module for its wide AC input operating range, active power factor correction, and low-ripple output regulation across multiple DC voltage rails.
Sourcing this unit as New Surplus establishes a secure operational hedge against unexpected rack failure on aging plant floors. Replacing a critical workstation PSU with second-hand or poorly stored refurbished components exposes your process control systems to voltage spikes, bad capacitors, and unexpected shutdown risks. Securing factory-sealed inventory preserves OEM circuit traces, ensures zero component wear, and minimizes Total Cost of Ownership (TCO) during emergency hardware swaps.
5. Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
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Enforce Lock-Out/Tag-Out (LOTO) protocols on main AC feed lines feeding the target server cabinet or control workstation.
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Wear a properly grounded anti-static wrist strap connected to chassis ground.
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Inspect internal harness routing and photograph existing molex/ATX motherboard pin allocations before disconnecting the old unit.
Stage 2: Removal
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Unplug the AC power cord from the rear inlet of the unit.
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Disconnect all 24-pin/20-pin ATX, 4-pin/8-pin CPU, and peripheral drive connectors from internal boards.
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Remove the 4 rear mounting screws holding the PSU chassis to the rack bracket, supporting the unit internally to prevent drops.
Stage 3: Installation (Clone & Seat)
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Align the FSP400-60PFI chassis against the rear mounting holes of the industrial enclosure.
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Thread and hand-tighten the 4 standard chassis mounting screws, then secure them with a torque screwdriver.
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Route the wiring harness neatly through management channels to prevent fan blade obstruction. Connect motherboard and peripheral headers securely until locking tabs snap into place.
Stage 4: Power-On & Testing
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Measure the incoming line voltage to verify it falls within the nominal 100–240 V AC operating window.
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Connect the primary AC input cable and toggle the rear power switch (if equipped) to the ON position.
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Verify internal cooling fan rotation and confirm the host system POSTs cleanly.
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Measure individual DC rails (+3.3V, +5V, +12V) using a digital multimeter at an unpopulated connector to verify outputs remain within ±5% tolerance.
FSP400-60PFI
FSP400-60PFI
6. Firmware/Software Versions & Upgrade Notes
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Hardware Hardware-Level Operation: The FSP400-60PFI operates strictly at the hardware level with internal analog control loops; it does not utilize user-flashable microcode or digital firmware updates.
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Motherboard Power Good Signal Compatibility: Provides standard hardware delay timing (100 ms to 500 ms) for the Power Good (
PWR_OK) signal, ensuring compatibility with legacy industrial ATX and industrial single-board computer (SBC) backplanes. -
System Power Budget Warning: When replacing power units in older workstations, verify that combined continuous draw on the +3.3 V and +5 V lines does not exceed the maximum cross-loading limits specified on the unit label. Exceeding total rail budgets will trip internal resettable over-current shutdowns.
7. Frequently Asked Questions (FAQ)
Q: Is this FSP400-60PFI power supply a brand-new unit or a repaired second-hand part?
This unit is 100% genuine New Surplus inventory. It has never seen field deployment in an industrial rack, was never pulled from a decommissioned control cabinet, and is not a refurbished board. It is delivered in its original anti-static packaging.
Q: Why choose New Surplus over low-cost refurbished units from online market sellers?
Refurbished industrial power supplies typically contain degraded electrolytic capacitors, dried-out thermal paste, and worn fan bearings that degrade efficiency over time. Paying a small premium for verified New Surplus ensures original OEM capacitor life, preventing multi-thousand-dollar plant outages caused by sudden power failures.
Q: What is the primary cause of premature failure in industrial PC power supplies?
Heat degradation and dust accumulation are the main failure vectors. Ensure cabinet cooling fans are operational and intake filters are clean. Purchasing 1-2 spare units for on-site buffer stock guarantees immediate replacement capability when older units reach end-of-life.
Q: Does this model support international AC grid voltages?
Yes. The FSP400-60PFI features a universal full-range input circuit supporting 100 V AC to 240 V AC at 50–60 Hz, making it compatible with global industrial power standards without requiring manual voltage selector switch configuration.
Q: What warranty coverage applies to this module?
We back our New Surplus FSP400-60PFI power supplies with a full 1-year replacement warranty. If a unit exhibits manufacturing defects or fails standard startup verification, we replace it directly from our warehouse inventory.
