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White rectangular power supply unit with metal casing and terminal connections

YINGHUA

YINGHUA 12V 3A White Power Supply for Door Lock

SKU CH-WQDR-ABA85

A 12 V 3 A power supply for access-control locks, accepting 110–240 V AC input and providing adjustable 0–15 second delay with short-circuit protection

  • TypeChain Guard
  • MaterialMetal
  • FunctionEntrance
  • Stable 12 V 3 A output powers single locks reliably
  • Wide AC 110–240 V input suits global mains voltages
  • Adjustable 0–15 second delay tailors lock-release timing
  • Automatic short-circuit protection cuts power to prevent damage
  • Controls lock directly reducing controller load and wiring complexity

Power Supply for Door Locks

This YINGHUA unit delivers a steady 12 V DC at 3 A for access-control systems. It accepts a wide AC input from 110 V to 240 V, making it suitable for standard mains supplies. The supply is designed to power electric locks, controllers, exit buttons and RFID readers directly. It replaces the need for separate transformers in a typical door-entry installation.

Sustained Load Behaviour

The built-in delay circuit holds the lock output for up to 15 seconds, reducing wiring complexity and controller load. Automatic protection disconnects the output temporarily if a short-circuit occurs, then restores operation once the fault clears. This behaviour keeps the supply stable during continuous daily use without manual reset. The anti-interference design maintains clean output across varied site conditions.

Single-Door Current Rating

The 3 A rating covers one electric lock reliably; a second lock would require the 5 A variant for stable operation. Buyers who want more than one lock on a single supply cannot meet that need with this model. The fixed 12 V output also means it cannot serve devices needing other voltages. Choose this unit only when a single lock is specified.

Highlights

  • Stable 12 V 3 A output powers single locks reliably
  • Wide AC 110–240 V input suits global mains voltages
  • Adjustable 0–15 second delay tailors lock-release timing
  • Automatic short-circuit protection cuts power to prevent damage
  • Controls lock directly reducing controller load and wiring complexity

Specifications

TypeChain Guard
MaterialMetal
FunctionEntrance

Questions about this item

How much heat or noise does the 12 V 3 A unit produce when powering a lock all day?

The supply uses a switch-mode design with automatic short-circuit protection that temporarily disconnects output on fault, keeping heat low and operation silent during continuous use.

What extra parts must I already have so the 12 V 3 A supply can run my door lock?

You need an electric lock (E/M type), an access controller, and an exit push button; the supply provides NC/NO outputs and a 0–15 s delay circuit to drive them.

Will the 110–240 V AC input on this 12 V 3 A supply work with the older 110 V wiring in my building?

Yes, the AC input range covers 110 V to 240 V, so it accepts legacy 110 V mains without any adapter or modification.

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