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Compact 300W AT power module with 24-pin ATX cable and 12V DC input

myVolts

myVolts 300W 12V DC Input AT Power Supply

SKU CH-WARD-K0PYQ

A 300 W AT power module that converts 12 V DC input into standard PC rails for mini-ITX and 1U systems

  • Product typeAT
  • 300W output powers demanding mini-ITX builds
  • 12V DC input works with external adapters
  • Industrial solid capacitors ensure stable high-temperature operation
  • Over-current and short-circuit protection keeps components safe
  • Compact 154 x 35 x 15mm board fits tight spaces

Compact 300W DC-AT Supply

The myVolts module converts a 12V DC source into standard ATX rails for mini-ITX, 1U and embedded systems. It ships with a 24-pin ATX cable, a 20-pin adapter, AUX and SATA leads for direct connection.

Sustained Load Behaviour

Rated at 300W continuous output with 85% efficiency, the unit operates from 11.4V to 12.6V input and draws up to 25A. Industrial solid capacitors maintain stability across a 0°C to 55°C working range at up to 75% humidity.

Pre-Installation Checks

Verify your external adapter can deliver 12V at 25A continuously and that the 154mm x 35mm board fits the mounting points. Confirm the 24-pin or 20-pin main connector matches the motherboard and that SATA power is required for drives.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $43.99
Cheaper than about 92% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product typeAT

Questions about this item

How much heat and power draw should I expect when the 300W module runs continuously at 85% efficiency?

At full 300W output the unit draws up to 25A from the 12V source, so sustained operation produces noticeable warmth; ensure the case airflow keeps the board within its 0–55 °C working range.

Which external 12V DC adapter must I already own to feed the 11.4–12.6V input range?

You need a separate 12V DC power adapter capable of delivering at least 25A continuously, with a compatible DC plug for the supplied input cable.

Will the included 24-pin-to-20-pin cable let me power an older ATX motherboard that only has a 20-pin connector?

Yes, the bundled adapter cable converts the module’s 24-pin ATX connector to the 20-pin format used by earlier boards.

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