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Black rectangular metal power supply unit for door access control systems

YINGHUA

YINGHUA Access Control Power Supply 12V 3A Black

SKU CH-E74J-ASFVJ

Delivers stable 12 V DC at 3 A for electric locks, accepts 110–240 V AC input and offers adjustable 0–15 s delay timing

  • TypeChain Guard
  • MaterialMetal
  • FunctionEntrance
  • Delivers stable 12V 3A DC output for reliable lock operation
  • Wide AC 110-240V input suits global mains voltages
  • Adjustable 0-15 second delay timer matches door timing needs
  • Built-in short-circuit protection cuts power automatically during faults
  • Controls electric locks directly reducing controller load and wiring

Power Supply for Access Control Systems

The YINGHUA unit delivers a stabilised 12 V DC output at 3 A for door-lock installations. It accepts a wide AC input range of 110 to 260 V, making it suitable for standard mains supplies. The module is designed to drive electric locks, access controllers, exit buttons and RFID readers directly.

Sustained Load Behaviour

The supply maintains a continuous 3 A output for extended lock-hold periods without shutting down. An adjustable delay circuit holds the lock energised for up to 15 seconds after the trigger signal. Built-in short-circuit protection disconnects the output automatically during a fault, then restores operation once the condition clears.

Thermals Noise and Power Draw

The metal enclosure acts as a heatsink, dissipating heat silently without a fan. No moving parts mean zero acoustic noise during normal operation. Power consumption scales with the connected lock load, drawing only what the 12 V circuit requires from the AC mains.

Highlights

  • Delivers stable 12V 3A DC output for reliable lock operation
  • Wide AC 110-240V input suits global mains voltages
  • Adjustable 0-15 second delay timer matches door timing needs
  • Built-in short-circuit protection cuts power automatically during faults
  • Controls electric locks directly reducing controller load and wiring

Specifications

TypeChain Guard
MaterialMetal
FunctionEntrance

Questions about this item

How much heat or noise does the 12 V 3 A unit produce when running continuously?

The supply uses a built-in delay circuit and automatic protection that limits heat build-up during long operation; no fan is mentioned, so it runs silently.

What cables or connectors must I already have to wire this supply to my lock and controller?

You will need low-voltage wire for the DC 12 V output and a standard AC mains lead for the 110–260 V input; terminal blocks on the unit accept both.

Will the 0–15 s delay setting work with an older electromagnetic lock that has no built-in timer?

Yes, the adjustable delay circuit lets you set the release time from 0 to 15 seconds, so it can drive legacy mag-locks that lack their own timer.

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