It looks like you’re referring to a 12V 0.43A Cabinet Drawer Lock (Solenoid Lock), which is an electromagnetic locking device commonly used in electronic drawers, cabinets, lockers, and smart security systems. Here’s a detailed explanation: What it is A 12V solenoid lock operates when a 12V DC supply is applied. The rated current is 0.43A, meaning it consumes about 5.2 watts (12V × 0.43A). It has a metal body with a plunger/bolt that locks into place when inactive and retracts when energized (or vice versa, depending on the type). Compact size makes it suitable for furniture, vending machines, or DIY smart cabinet projects. Working Principle When no power is applied, the lock is either locked (fail-secure) or unlocked (fail-safe) depending on the model. When 12V DC power is applied, the solenoid coil creates a magnetic field that moves the plunger, allowing the drawer or door to lock/unlock. It can be controlled using microcontrollers (Arduino, ESP32, Raspberry Pi) via a relay module or a MOSFET transistor, since it requires more current than a microcontroller pin can directly provide. How to Interface with Arduino Power Supply: Use a 12V adapter or battery capable of supplying at least 0.5A. Relay/MOSFET Driver: Connect the solenoid lock to a relay module (or N-channel MOSFET like IRF540N). The relay/MOSFET will act as a switch between the Arduino and the lock. Arduino Control: Connect the relay input pin to an Arduino digital pin. When the Arduino sends a HIGH/LOW signal, it activates the relay/MOSFET, which powers the lock. Diode Protection: Always place a flyback diode (1N4007) across the solenoid terminals to prevent voltage spikes from damaging your circuit.