The **M2TT-21-R2/N** is a specific model of an **electromechanical toggle switch** manufactured by **NKK Switches**. It belongs to the M2 series, which is known for its miniaturized size and high reliability in PCB (Printed Circuit Board) applications. --- ### 1. Technical Specifications Below is a breakdown of the electronic and mechanical characteristics: | Feature | Specification | | :--- | :--- | | **Circuit Configuration** | DPDT (Double Pole, Double Throw) | | **Switch Function** | ON - NONE - ON | | **Current Rating** | 6A @ 125V AC / 3A @ 250V AC / 4A @ 30V DC | | **Termination Style** | Right Angle PC Terminal (Horizontal Mount) | | **Actuator Style** | Standard Bat Lever | | **Contact Material** | Silver (standard) | | **Mechanical Life** | 100,000 Operations minimum | | **Operating Temp Range** | -30°C to +85°C | --- ### 2. Part Number Breakdown Understanding the suffix/prefix of the M2TT-21-R2/N helps identify its physical form: * **M2**: Series identifier (Miniature Process Toggles). * **T**: Toggle actuator type. * **T**: Tapered Bushing or specific mounting style. * **21**: Represents the circuit (DPDT, ON-ON). * **R2**: Indicates the **Right Angle** terminal orientation with specific spacing. * **N**: Typically denotes a standard hardware or no-shroud configuration. --- ### 3. Key Electronic Components & Materials * **Contacts:** Uses a "butt contact" mechanism. The silver plating ensures high conductivity and lowers contact resistance (typically <10 milliohms). * **Insulation:** The base is constructed from Diallyl Phthalate (DAP) resin, which provides high dielectric strength (1,000V AC minimum between contacts). * **Terminals:** Epoxy sealed to prevent the entry of flux, solvents, or other contaminants during the soldering process. --- ### 4. Application Use Cases This specific part is frequently used in industrial and telecommunications equipment due to its DPDT nature, allowing it to control two separate circuits simultaneously. 1. **Logic Level Switching:** Reliable enough for low-power signal routing. 2. **Power Distribution:** Capable of handling moderate AC/DC loads for device power states. 3. **Control Panels:** The right-angle mount is ideal for edge-of-board installation where the toggle needs to protrude through a side panel.