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Silver 1U server PSU, dual 40 mm fans, 24-pin and 8-pin connectors visible

Athena Power

Athena Power AP-U1ATX50 500W 1U server power supply

SKU CH-3SJZ-4KD13 MPN AP-U1ATX50

A 1U 500 W server power supply with 20+4-pin ATX, EPS 8-pin and four SATA connectors for 1U chassis

  • Max wattage500 W
  • Power supply redundancySingle
  • Main power connector20+4Pin
  • Output current+3.3@20A,+5 V@20A,+12V1@20A, +12V2@20A, +12V3@16A, +5VSB@3A
  • Supply voltage88–264 V
  • AC input frequency47–63 Hz

Wattage 500W

  • 500 W output powers dense 1U servers
  • 88–264 V full-range input suits global racks
  • Active PFC raises efficiency at load
  • 24-pin ATX plus EPS and P4 connectors
  • Dual 40 mm ball-bearing fans cool chassis

Product identity

The Athena Power AP-U1ATX50 is a 500W single-output 1U server power supply built for rack-mount chassis that require an EPS-style layout. It suits system integrators and IT teams deploying compact servers or workstations needing reliable DC delivery in a slim form factor.

Compatibility checks

Verify that your chassis accepts a 1U PSU measuring 1.59 by 8.66 by 3.94 inches and that the motherboard provides a 20+4 pin main header plus an EPS-12V 8 pin CPU header. Confirm the system can operate on 88 to 264 V input at 47 to 63 Hz and that the load profile stays within the rated +12V rail limits of 20 A, 20 A and 16 A respectively. Builds needing redundant supplies or higher total wattage should look elsewhere.

Build quality and daily use

Dual 40 mm ball-bearing fans with automatic speed control move air from rear to front, helping keep internal temperatures in check while moderating acoustic output. The unit carries 80 PLUS Bronze certification and active PFC for efficient conversion across the full input range. Connectors include one 24-pin ATX, one EPS-12V 8 pin, one 4+4 pin CPU, four SATA, four Molex and one floppy, covering typical server drive and board layouts. A remote on/off function allows external power sequencing. MTBF is rated at 100,000 hours at full load and 25 °C.

How it compares

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

Price $81.99
Cheaper than about 76% of the 3,798 comparable items (median $131.99).
Max wattage 500 W
Lower than about 60% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameAthena Power
Model nameAP-U1ATX50
Power
Max wattage500 W
Power supply redundancySingle
Main power connector20+4Pin
Output current+3.3@20A,+5 V@20A,+12V1@20A, +12V2@20A, +12V3@16A, +5VSB@3A
Supply voltage88–264 V
AC input frequency47–63 Hz
Power hold-up time17 ms Minimum at Nominal Input Voltage
Size & build
Product dimensions1.59 in × 8.66 in × 3.94 in
Product weight3.5 lb (1.59 kg)
Shipping weight1.50 kg
Package size281 × 189 × 102 mm
Environment & compliance
Humidity rangeOperating: 0 degree C ~ +50 degree C on Full Load
Storage & Shipping: -20 degree C ~ +80 degree C
Temperature range0 degree C ~ +50 degree C on Full Load
More details
Mean time between failures100,000 h on Maximum Load at +25 degree C

Other versions of this model

2 more in the same range

Questions about this item

Does the PSU ship with all cables attached or are any modular leads sold separately?

The unit is non-modular; it comes with a fixed 24-pin ATX, one 8-pin EPS, one 4+4-pin CPU, four SATA, four Molex and one floppy connector already attached.

Which rail should I size my build around — the 12 V rails or the minor rails?

The three 12 V rails deliver 20 A, 20 A and 16 A respectively, while the 3.3 V and 5 V rails are each rated at 20 A; total output is capped at 500 W.

What does the 500 W rating mean when the PSU is running at 50 °C inside a 1U chassis?

The 500 W maximum is specified at full load up to 50 °C ambient, with a minimum 17 ms hold-up time and 100,000-hour MTBF at 25 °C.

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