This 12VDC Solenoid Door Lock is an ultra-compact, heavy-duty electronic latching mechanism designed for automated security applications. Utilizing a pull-solenoid design, the internal iron core bolt immediately retracts when a 12V DC pulse is applied, allowing doors, drawers, or lids to open. It is widely used in smart furniture, secure lockers, and custom automation projects where space is severely restricted.

Specifications

• Operating Voltage: 12V DC
• Operating Current: Approximately 0.4A to 0.6A (at 12V)
• Power Consumption: ~6W–7.2W
• Lock Bolt Stroke (Travel Distance): 4mm to 5mm
• Unlocked Duration: Designed for intermittent triggering (< 10>
• Body Dimensions: 27mm x 16mm x 15mm (L x W x H, excluding the latch bolt)
• Latch Bolt Dimensions: Extends approximately 7mm from the housing body
• Wire Layout: 2-wire lead (approx. 10cm–15cm) terminated with a standard connector (often XH-2.54 or open wire)

• Power Off (De-energized): The strong internal return spring pushes the iron core latch outward into the matching strike plate frame, keeping the closure physically locked.
• Power On (Energized): Direct current flowing through the tightly wound copper coil inside the chassis creates an electromagnetic field. This magnetic force overcomes the return spring, pulling the latch bolt completely inside the housing to release the door.

Common Applications

• Smart Cabinets & Desks: Creating keyless drawers or hidden storage spaces triggered by RFID, Bluetooth, or biometric scanners.
• Parcel Delivery Lockers: Building multi-compartment smart lockers that open via QR codes or pins.
• Vending Mechanisms: Securing internal dispensing traps or drop-bins in automated retail machines.
• Robotics & DIY Escapements: Building remote-controlled traps, sorting gates, or automated safety enclosures using an Arduino, ESP32, or Raspberry Pi.

Interfacing and Driving Tips

• Pulse Power Only (Do Not Hold Open): Micro solenoids act like high-current inductive loads and dissipate heat rapidly. If you leave power applied to this tiny 27mm lock for more than 10 seconds, the internal copper coil will quickly overheat, melt its wire insulation, and permanently short out. Always use brief software unlock pulses (500ms to 2 seconds is optimal).
• Flyback Diode Protection: When power to the solenoid is abruptly cut off, the collapsing magnetic field causes a massive reverse-voltage spike (inductive kickback). You must wire a flyback diode (such as a 1N4007) in parallel across the solenoid terminals (Anode to Ground/Negative, Cathode to 12V Positive) to prevent this spike from destroying your control circuitry.
• Driver Interface: A microcontroller pin cannot supply the 400mA–600mA required by this device. Use a power transistor (like a TIP120), an N-Channel MOSFET (like an IRF540N), or a standard 5V relay module paired with an external 12V power supply to actuate the lock safely.