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Silver rectangular 1U server PSU with two fans and mesh grille

Athena Power

Athena Power AP-U1ATX40P8 400W 1U server power supply

SKU CH-HEBD-JD4J6 MPN AP-U1ATX40P8

A 400 watt single 1U server power supply with 80PLUS Bronze certification, active PFC, dual fans and a 20+4 pin main connector

  • Max wattage400 W
  • Power supply redundancySingle
  • Main power connector20+4Pin
  • Output current+3.3 V@16A, +5 V@16A, +12V1@11A, +12V2@11A
  • Supply voltage88 -264 V Ac
  • AC input frequency47–63 Hz

Wattage 400W

  • 80PLUS Bronze certification lowers energy waste
  • Active PFC meets EN61000-3-2 for clean power draw
  • Dual fans with smart speed control keep noise low
  • 100,000-hour MTBF at full load and +25°C
  • Fits 1U racks at 3.93" x 1.57" x 7.87

1U 400W server power supply

The Athena Power AP-U1ATX40P8 is a single 400W unit built for 1U rackmount servers. It delivers +12V across two rails at 11A each with a 20+4 pin main connector and an EPS 8-pin CPU connector. The supply suits integrators assembling dense compute nodes that require standard ATX and EPS power in a compact chassis.

80 PLUS Bronze 88-264V AC input

Efficiency meets 80 PLUS Bronze certification with active PFC compliant to EN61000-3-2. The full-range input accepts 88 to 264 volts AC at 47 to 63 Hz without manual switching. Hold-up time is rated at 17ms minimum at nominal voltage. The unit provides over-voltage, short-circuit and overload protection but lacks redundant or hot-swap capability for high-availability clusters.

Dual-fan cooled 3.0lb chassis with SATA

Two internal fans are managed by a smart auto speed controller for thermal balance. The enclosure measures 3.93 by 1.57 by 7.87 inches and weighs 3.0lbs. Connectors include three SATA, two PCIe 6-pin, two Molex, one floppy and dual P4 4-pin plugs. Operating temperature range is 0°C to 50°C at full load with MTBF of 100,000 hours at 25°C.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $71.99
Cheaper than about 80% of the 3,798 comparable items (median $131.99).
Max wattage 400 W
Lower than about 70% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameAthena Power
Model nameAP-U1ATX40P8
Power
Max wattage400 W
Power supply redundancySingle
Main power connector20+4Pin
Output current+3.3 V@16A, +5 V@16A, +12V1@11A, +12V2@11A
Supply voltage88 -264 V Ac
AC input frequency47–63 Hz
Power hold-up time17 ms Minimum at Nominal Input Voltage
Built-in protectionOver voltage and circuit protection
Size & build
Product dimensions3.93 in × 1.57 in × 7.87 in
Product weight3.0 lb (1.36 kg)
Shipping weight1.27 kg
Package size251 × 157 × 81 mm
In the box
In the box1 x AP-U1ATX40P8
1 x Power Cord
Environment & compliance
Humidity range5 to 90% on Operating, 5 to 95% on Storage
Temperature rangeOperating: 0 °C to 50 °C on Full Load
More details
Fan configuration2
Mean time between failures100,000 h on Maximum Load at 25 °C

Other versions of this model

2 more in the same range

Questions about this item

Should I choose a single or redundant 400W supply for my 1U server?

This model is a single 400W unit; it does not support redundant operation.

What does the 400W rating mean for actual 12V delivery in a server build?

The two 12V rails each provide up to 11A, giving a combined 12V capacity within the 400W total.

Does the EPS 80 PLUS Bronze rating limit the input voltage range I can use?

The unit accepts 88–264 V AC at 47–63 Hz, so the efficiency rating does not restrict the input range.

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