DC 12V 5A Access Control Power Supply for Electric Locks
DC 12V 5A Access Control Power Supply for Electric Locks
DC 12V Access Control Power Supply Switch – 5A Output, AC 110V–240V Input
Power your access control system with confidence using this professional-grade DC 12V / 5A switching power supply. Designed specifically for electric locks, video intercoms, face recognition terminals, fingerprint readers, and card-access devices, this unit delivers stable, reliable DC power in a compact enclosure. Made in Mainland China.
Why Choose This Power Supply?
- Wide AC Input Range: Accepts AC 110V–240V, 50/60 Hz — compatible with power grids worldwide.
- Robust 5A Peak Output: 5A momentary current (3.5A persistent) and 60W output power handle even demanding electric lock loads.
- Built-In Time-Delay Circuit: Adjustable unlock delay from 0 to 15 seconds for flexible door control configurations.
- Supports NO & NC Locks: Compatible with both Normally Open (Fail-Secure) and Normally Closed (Fail-Safe) electric locks.
- Built-In Battery Interface: Supports an optional lithium battery backup to keep your access system running during power outages.
- Short-Circuit & Overheat Protection: Automatically disconnects voltage output if the external circuit short-circuits or overheats; resumes normal operation after 3-minute cooldown, protecting all connected devices.
- Versatile Control Input: Accepts DC 5V or DC 12V signals via CONTROL terminals for seamless integration with standalone controllers and automation systems.
- Exit Button (PUSH) Terminal: Dedicated PUSH + GND terminal for door release button wiring.
Terminal Reference Guide
- NO + GND: Fail-Secure lock terminal — DC 12V output after trigger (0–15s adjustable).
- NC + GND: Fail-Safe lock terminal — DC 12V output after trigger (0–15s adjustable).
- PUSH + GND: Exit button switch input — controls lock/unlock. Do not connect an active electrical signal to PUSH/GND.
- +12V + GND: Supplies DC 12V to connected devices (intercoms, readers, cameras, etc.).
- CONTROL+ / CONTROL−: Accepts DC 5V or DC 12V signal for electric lock open/close control.
Specifications
| Model | KDB18 |
| AC Input | AC 110–240V, 50/60 Hz |
| Output Voltage | DC 12V |
| Output Current (Peak) | 5A |
| Persistent Current | 3.5A |
| Output Power | 60W |
| Delay Time | 0–15 seconds (adjustable) |
| Battery Interface | Yes (built-in lithium battery compatible) |
| Dimensions | 185 × 120 × 57 mm |
| Working Temperature | −20°C to +60°C |
| Working Humidity | ≤ 90% RH |
| Country of Origin | Made in Mainland China |
Compatible Applications
- Electric door locks (magnetic locks, electric strikes, bolt locks)
- Video intercom & building entry systems
- Face recognition & fingerprint access terminals
- RFID card reader systems
- Standalone access control controllers
- CCTV camera systems requiring DC 12V
Important Note: Please set the delay time to its minimum value before connecting an electric control lock. The PUSH/GND terminal is a passive switch input only — do not apply an active electrical signal to it.
For general information on electrical safety standards for power supplies and access control equipment, visit the U.S. Consumer Product Safety Commission (CPSC). For workplace electrical safety guidance, refer to OSHA's Electrical Safety Standards.
Frequently Asked Questions
Q: What types of electric locks are compatible with this DC 12V access control power supply?
A: This power supply is compatible with both Normally Open (NO / Fail-Secure) and Normally Closed (NC / Fail-Safe) electric locks. It is also suitable for magnetic locks, electric strikes, bolt locks, and other 12V DC-powered locking devices used in access control and video intercom systems.
Q: Can I use this power supply during a power outage?
A: Yes. This unit features a built-in battery interface that supports an optional lithium battery backup. When a compatible battery is installed, the system can continue to operate your access control devices during a mains power interruption, maintaining door security without interruption.
Q: What happens if there is a short circuit or overheating event?
A: The power supply has a built-in protective circuit that automatically disconnects the voltage output if a short circuit or overheating is detected on the external circuit. After approximately 3 minutes of troubleshooting (once the fault is cleared), you can power the unit back on and it will resume normal operation, protecting all connected devices from damage.
Q: Is this power supply compatible with international voltages?
A: Yes. The unit accepts a wide AC input range of 110V–240V at 50/60 Hz, making it suitable for use in North America, Europe, Asia, and most other regions worldwide without the need for an additional voltage converter.