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Rectangular aluminium power supply unit with input voltage selector switch and screw terminals

Vszerda

Vszerda S120-240-20A 12V 20A Switching Power Adapter

SKU CH-MJ8F-PVZ43

A 12V 20A regulated switching supply with selectable 110V or 220V AC input and short-circuit, overload and over-voltage protection

  • Selectable 110V or 220V AC input by switch
  • 12V DC output at 20A delivering 240W power
  • Shortage, overload and over-voltage protection built in
  • Aluminium housing aids heat dissipation for indoor use
  • Output voltage adjustable by 10% via ADJ terminal

Industrial 240 W DC supply

The Vszerda S120-240-20A converts 110 V or 220 V AC mains into a regulated 12 V DC output rated at 20 A. A slide switch on the chassis selects the input range before power is applied. The aluminium enclosure is intended for indoor mounting in automation cabinets, LED lighting installations or CCTV systems.

Protection and adjustment

Built-in circuits guard against short-circuit, overload and over-voltage events on the output side. A separate +V/ADJ terminal allows the output voltage to be trimmed by approximately 10 % to compensate for cable drop in long LED strip runs. Screw terminals accept the AC lines and the DC load without soldering.

Single-rail 20 A limit

The unit delivers its full 240 W on a single 12 V rail, so any load drawing more than 20 A will trigger protection. Buyers who need higher current, multiple output voltages or an outdoor-rated enclosure must select a different power supply.

Highlights

  • Selectable 110V or 220V AC input by switch
  • 12V DC output at 20A delivering 240W power
  • Shortage, overload and over-voltage protection built in
  • Aluminium housing aids heat dissipation for indoor use
  • Output voltage adjustable by 10% via ADJ terminal

Specifications

BrandVszerda
ModelS120-240-20A
Part NumberS-120-240

Questions about this item

Does the aluminium shell need any cleaning or fan maintenance over time?

The unit has no fan and a sealed aluminium case, so no internal cleaning is required; just keep the exterior vents free of dust.

Which protection circuit trips first when the load stays near 240 W for hours?

Overload protection activates once the output exceeds the rated 20 A limit, shutting the supply down before heat builds up.

How hot does the case get and how much AC power does it draw when running at 20 A continuously?

At full 240 W output the aluminium housing becomes warm to the touch while drawing roughly 240 W plus efficiency losses from the 110-220 V AC line.

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