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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

  • 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.

Highlights

  • 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

Specifications

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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