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Enclosed metal power supply unit with screw terminals and cooling fan

myVolts

myVolts 12V 20A 240W power supply

SKU CH-743A-NSHP9

Converts 100-240V AC to 12V DC at up to 20A with selectable 110V or 220V input and multiple safety protections

  • TypeAT
  • Universal 100-240V AC input works worldwide
  • 12V DC 20A output delivers 240W reliable power
  • Multiple protection circuits guard against short, overload and over-voltage faults
  • Metal enclosure with cooling fan dissipates heat for longer service life
  • Selectable 110V/220V switch matches local mains voltage

Universal 12V 20A Supply

This regulated switching power supply converts 100-240V AC mains to a stable 12V DC output rated at 20 amps. It targets industrial automation, LED lighting, CCTV, radio equipment, 3D printers and similar DC projects. The enclosed metal chassis includes a built-in fan for thermal management. A manual 110V/220V input selector must be set correctly before powering the unit.

Upgrade From Lower-Capacity Adapters

The 240W continuous rating replaces smaller 12V bricks that cannot sustain heavy LED strips or motor loads. The jump is worthwhile when the connected load approaches or exceeds the previous adapter's current limit, triggering shutdown or voltage sag. Integrated short-circuit, overload, over-voltage, over-current, over-temperature and leakage protections reduce the risk of damage to both the supply and the attached device.

240W Headroom And Limits

At the rated 20A output the unit delivers 240W, sufficient for medium LED installations, single-extruder 3D printers or multiple CCTV cameras. The supplier specification also lists a 33A and 400W figure, but the nameplate rating remains 20A and 240W; sustained operation above that level is not supported. Operating temperature range is -20 to 60 degrees Celsius, and screw terminals accept solid or stranded wire for secure connections.

Highlights

  • Universal 100-240V AC input works worldwide
  • 12V DC 20A output delivers 240W reliable power
  • Multiple protection circuits guard against short, overload and over-voltage faults
  • Metal enclosure with cooling fan dissipates heat for longer service life
  • Selectable 110V/220V switch matches local mains voltage

Specifications

TypeAT

Questions about this item

What screw-terminal spacing does the 12V 20A 240W supply use for wiring?

The unit provides standard screw terminals for both the AC input and the 12V DC output; strip each wire, insert it into the terminal block, and tighten the screws securely.

Which step must be done before plugging the 12V 20A 240W unit into mains power?

Set the 110V/220V selector switch to match your local mains voltage — 110V for North America, 220V for most other regions — before connecting the AC cord.

How often should the internal cooling fan on the 12V 20A 240W supply be cleaned?

Blow dust out of the fan and ventilation slots every few months, or more often in dusty environments, to maintain airflow and prevent thermal shutdown.

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