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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

  • Product 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.

How it compares

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

Price $38.99
Cheaper than about 93% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Product 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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