The **KFS-12-R** is a specific model of a **Keylock Switch**. It is an electromechanical component used to control electrical circuits by requiring a physical key to actuate the switch mechanism. This provides a layer of security or prevents accidental operation of equipment. --- ### 1. Key Technical Specifications Below is a breakdown of the typical electronic and physical properties of the KFS-12-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Keylock Switch (Rotary) | | **Mounting Type** | Panel Mount | | **Hole Diameter** | 12mm | | **Contact Configuration** | SPST (Single Pole Single Throw) or SPDT | | **Switching Positions** | 2 Positions (ON-OFF) | | **Key Removal** | Usually removable in both positions | | **Termination Style** | Solder Lugs / PC Terminals | --- ### 2. Functional Electronic Components The internal structure consists of several critical electronic and mechanical parts: * **Contact Terminals:** Usually made of silver-plated copper or brass. These are the points where wires are soldered to complete the circuit. * **Internal Rotor:** A rotating plastic or metal cylinder that turns when the key is inserted and twisted. It moves the internal contact plate. * **Contact Plate/Bridge:** A conductive metal piece inside the housing that bridges the gap between terminals to allow current flow. * **Housing (Cylinder):** Typically made of a zinc alloy or durable plastic, providing the grounding and structural integrity for the switch. --- ### 3. Usage and Applications Because of its 12mm compact size and key-based operation, it is commonly found in: 1. **Security Alarms:** Enabling or disabling a security system. 2. **Industrial Controls:** Locking out a machine so only authorized personnel can start it. 3. **Computer Cases:** Historically used for "Turbo" modes or locking the front panel. 4. **Electric Vehicles:** Simple ignition switches for e-scooters or golf carts. --- ### 4. Circuit Diagram Logic In a standard 2-position KFS-12-R setup, the logic follows a simple open/closed state: ```text Position 1 (OFF): Terminal A ---/ --- Terminal B (Circuit Open) Position 2 (ON): Terminal A --------- Terminal B (Circuit Closed) ```