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Compact black circuit board module with 24-pin ATX, SATA and auxiliary cables attached

myVolts

myVolts 300W Power Supply Module 12V DC AT 24Pin SATA

SKU CH-FHW7-JZGPT

A 300W power supply module accepting 12V DC input with 24-pin ATX, AUX and SATA connectors for mini-ITX and 1U cases

  • TypeAT
  • 300W output from 12V DC input for compact builds
  • Industrial solid capacitors deliver stable high-temperature operation
  • Silent fanless design keeps workspaces quiet
  • Over-current and short-circuit protection safeguards components
  • 154 × 35 × 15 mm module fits mini-ITX and 1U cases

Compact 300W DC-DC Module

This 300W power supply module accepts a 12V DC input between 11.4 and 12.6V and delivers ATX power through a 24-pin connector plus AUX and SATA cables. It is built for mini-ITX and 1U cases where a standard AC-DC PSU will not fit. Industrial solid capacitors provide stable operation up to 55°C.

Replaces Bulky AC-DC Units

The module replaces a full-size ATX power supply in space-constrained builds such as HTPCs, POS terminals, digital set-top boxes and network servers. The jump is worth it when the chassis cannot accommodate a conventional PSU but an external 12V adapter rated for at least 25A is available. It is not for builders who need an integrated AC inlet or who lack a suitable high-current DC source.

300W Continuous Headroom

Rated at 300W output with 85% efficiency, the board comfortably powers typical mini-ITX platforms and low-power mining machines within the 0 to 55°C working range. Headroom runs out when combined rail draw approaches the 25A input limit or when the external adapter cannot sustain the required current. The compact 154 x 35 x 15mm PCB leaves no room for additional onboard connectors beyond the supplied cables.

Highlights

  • 300W output from 12V DC input for compact builds
  • Industrial solid capacitors deliver stable high-temperature operation
  • Silent fanless design keeps workspaces quiet
  • Over-current and short-circuit protection safeguards components
  • 154 × 35 × 15 mm module fits mini-ITX and 1U cases

Specifications

TypeAT

Questions about this item

What are the board dimensions of the 300W module so I can check fit in my 1U case?

The module board measures 154 x 35 x 15 mm, making it suitable for mini-ITX and 1U chassis where space is limited.

How do I connect the 12V DC input and the 24-pin ATX cable correctly?

Attach the supplied DC input cable to a 12V source (11.4–12.6V, up to 25A), then plug the 24-pin ATX connector directly into the motherboard; the 24-pin to 20-pin adapter is included for older boards.

What ongoing care does the module need given its industrial solid capacitors and fanless design?

No scheduled maintenance is required; keep the operating environment within 0–55 °C and 45–75 % humidity, and ensure airflow around the 154 x 35 x 15 mm board for passive cooling.

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