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Compact rectangular DC-ATX power module, matte black finish, fanless, 155 by 35 by 20 mm

myVolts

myVolts 19V DC-ATX Power Module 155 x 35 x 20 mm

SKU CH-7HSR-E3N54

Fanless DC-ATX module accepts 16–24 V input and delivers 3.3 V, 5 V and 5 VSB rails with short-circuit and over-voltage protection

  • TypeAT
  • Fanless design runs 100% silent
  • Polymer capacitors on the PCBA extend service life
  • circuit protection shuts output instantly when a fault occurs
  • Overvoltage protection closes output at 1.5 times rated voltage
  • Compact 155 x 35 x 20 mm module fits mini ITX builds

Silent DC-ATX Module for Mini ITX

The myVolts 19V DC-ATX Power Module converts a 16 V to 24 V DC source into standard ATX rails for mini ITX motherboards. Its fanless construction makes it completely silent during operation. High-quality polymer capacitors on the PCBA contribute to a long service life. The compact 155 x 35 x 20 mm form factor fits space-constrained builds.

Replaces Bulky AC PSUs in DC Environments

This module replaces a conventional AC ATX power supply when a 19 V DC input is already available, such as in industrial or embedded systems. The jump is worthwhile when silence and a small footprint matter more than maximum output current. It is not suited for full-size ATX boards or systems drawing more than 10 A on the 3.3 V rail or 6 A on the 5 V rail. Builders who need higher peak power or additional PCIe connectors must look elsewhere.

Steady Output Under Continuous Load

Overvoltage protection shuts the output down at 1.5 times the rated voltage, while short-circuit protection cuts power instantly when a fault occurs. The unit maintains at least 85 percent work efficiency across the input range, limiting heat buildup during sustained use. Ripple stays within 50 mV on all rails even at peak currents of 10 A on 3.3 V and 6 A on 5 V. The fanless design relies on passive cooling, so airflow in the chassis remains essential for prolonged high-load scenarios.

Highlights

  • Fanless design runs 100% silent
  • Polymer capacitors on the PCBA extend service life
  • circuit protection shuts output instantly when a fault occurs
  • Overvoltage protection closes output at 1.5 times rated voltage
  • Compact 155 x 35 x 20 mm module fits mini ITX builds

Specifications

TypeAT

Questions about this item

Will the 155 x 35 x 20 mm module fit inside my mini-ITX case?

The module measures 155 mm long, 35 mm wide and 20 mm high, so verify your case has at least that much clear space near the 24-pin ATX connector.

How do I connect the 19 V DC source to the 4-pin input without reversing polarity?

Feed 16–24 V DC at up to 12.0 A into the 4-pin input header; match the silkscreen + and – markings exactly, as reversed polarity will prevent the unit from starting.

Do the polymer capacitors on the board have a defined service life I should plan around?

The board uses solid polymer capacitors rated for long life, and the fanless 85 % efficient design keeps internal temperatures low, so no scheduled capacitor replacement is expected under normal operation.

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