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Rectangular aluminium power supply, silver finish, screw terminals visible

myVolts

myVolts S-480-12 12V 40A 480W power supply

SKU CH-XXY1-7Q4WC

A 12V 40A 480W switch-mode power supply with overload, overvoltage and short-circuit protection for industrial automation, LED displays, CCTV and 3D printers

  • TypeAT
  • High efficiency and low DC ripple for stable output
  • Operates down to 0 °C with long service life
  • High insulation strength for safe operation
  • 100 % full-load burn-in test completed before use
  • circuit, overload and overvoltage protection included

Industrial 12V 40A Switching Supply

The myVolts S-480-12 delivers a regulated DC 12V output at up to 40A for 480W continuous power. It accepts AC110/220V input with a ±15% tolerance, making it suitable for industrial automation, LED displays, CCTV systems, 3D printers and similar fixed installations.

Stepping Up from Smaller AT Units

Builders replacing 36W or 50W AT-type supplies gain the headroom needed for larger LED arrays or multi-device rails without adding extra modules. The jump is worth it when a single 12V rail must feed several loads simultaneously and the previous unit hits its current limit or thermal shutdown.

Limits of the AT Form Factor and Terminal Block

The AT layout uses screw terminals for L, N, GND, V and ADJ connections rather than standard ATX connectors, so it cannot power a PC motherboard directly. Operating temperature is rated 0–40°C with 0–95% non-condensing humidity, and the unit relies on natural convection cooling, which restricts use in sealed or high-ambient enclosures.

Highlights

  • High efficiency and low DC ripple for stable output
  • Operates down to 0 °C with long service life
  • High insulation strength for safe operation
  • 100 % full-load burn-in test completed before use
  • circuit, overload and overvoltage protection included

Specifications

TypeAT

Questions about this item

What are the mounting dimensions of the S-480-12 power supply?

The unit measures approximately 85 x 58 x 33 mm, so allow that footprint plus clearance for the aluminium-alloy case and screw terminals.

Which terminals do I connect for AC input and DC output, and what is the common wiring mistake?

Connect live and neutral to L and N for 110/220 V AC, then attach the load to V+ and GND; the frequent error is leaving the ADJ potentiometer at factory setting instead of trimming it to exactly 12 V before powering the load.

What maintenance does the S-480-12 need over its service life?

Operate between 0 and 40 °C with humidity below 95 % non-condensing; periodically blow dust from the natural-convection vents and re-check the output voltage with a multimeter after the first 100 % load burn-in period.

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