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Silver aluminium rectangular switching power supply with voltage selector switch and screw terminals

Vszerda

Vszerda 12V 20A 240W Regulated Switching Power Supply

SKU CH-R81T-ZSM92

Regulated 12 V 20 A switching supply with selectable 110/220 V input, overload and over-voltage protection, and 10 % output adjustment

  • Selectable 110V or 220V input suits local mains voltage
  • 12V 20A output delivers 240W for LED strips and CCTV
  • Shortage, overload and over-voltage protection guards connected equipment
  • Aluminium shell aids heat dissipation for stable indoor operation
  • Output voltage adjustable by 10% via ADJ terminal for fine tuning

Power adapter for indoor projects

The Vszerda 12V 20A unit is a regulated switching power supply built for indoor use. It suits LED strip lighting, CCTV installations, radio equipment and computer projects that need a steady DC source. The aluminium shell houses the circuitry and provides passive cooling.

Thermals noise and power draw

The supply accepts AC 110V or 220V at 50 to 60 Hz, selectable by a manual switch that must be set before power-on. Output is fixed at 12V DC with a 20A maximum, delivering up to 240W. Protections cover short circuit, overload and over-voltage events during normal operation.

Adjustment and wiring details

A built-in adjuster allows the output voltage to be trimmed by roughly 10 percent via the +V/ADJ terminal. Connections are labelled L and N for AC input, COM for DC negative and V for DC positive. The unit is not waterproof and is rated for indoor use only.

Highlights

  • Selectable 110V or 220V input suits local mains voltage
  • 12V 20A output delivers 240W for LED strips and CCTV
  • Shortage, overload and over-voltage protection guards connected equipment
  • Aluminium shell aids heat dissipation for stable indoor operation
  • Output voltage adjustable by 10% via ADJ terminal for fine tuning

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the Vszerda 12V 20A power supply and set the input voltage correctly?

Mount the aluminium case indoors. Before connecting AC power, slide the selector switch to match your mains — 110V or 220V — then wire L and N to the AC input, COM to the DC negative and V to the DC positive. The step most people miss is verifying the switch position before the first power-on.

What maintenance or replacement will the Vszerda 12V 20A unit need over time?

The supply has no user-serviceable parts. Keep the ventilation slots clear of dust and ensure the indoor environment stays dry. If the built-in short-circuit, overload or over-voltage protections trigger repeatedly, the unit itself should be replaced.

What is the first limit reached when the Vszerda 12V 20A supply runs continuously at full load?

The 240W output rating is the hard ceiling. Drawing more than 20A at 12V activates overload protection and shuts the output down. Thermal limits inside the sealed aluminium case will also be reached if the 10% voltage adjustment is used to raise output while delivering maximum current.

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