The **M2TT-3D-R2/K** refers to a high-precision, miniature double-pole double-throw (DPDT) toggle switch manufactured by **Nidec Components** (formerly Copal Electronics). This specific part number belongs to the **M2 series**, designed for high-density mounting on printed circuit boards (PCBs). ### Technical Specifications | Feature | Specification | | :--- | :--- | | **Switch Function** | DPDT (Double Pole Double Throw) | | **Circuitry** | On-On | | **Current Rating** | 6A @ 125VAC / 3A @ 250VAC / 4A @ 30VDC | | **Mounting Type** | Right Angle (Through-Hole) | | **Actuator Length** | Standard Toggle (Approx. 10.5mm) | | **Contact Material** | Silver Plated (K denotes specific contact type) | | **Terminal Spacing** | 2.54mm (0.1 inch) pitch | --- ### Key Electronic & Mechanical Components #### 1. Terminal Configuration (3D/R2) * **3D:** Indicates the specific DPDT switching logic and internal mechanical configuration. * **R2:** This suffix specifies the **Right Angle** lead forming. This allows the switch to be mounted on the edge of a PCB while the toggle protrudes horizontally, saving vertical space in slim enclosures. #### 2. Contact Mechanism The "K" suffix typically refers to the contact material or specific packaging options. In the M2 series: * **High Reliability:** The internal contacts use a twin-contact mechanism to ensure electrical stability even in low-current applications. * **Dielectric Strength:** Usually rated for 1,000V AC for one minute between terminals. #### 3. Material Composition * **Housing:** Heat-resistant resin (UL94V-0) capable of withstanding wave soldering temperatures. * **Actuator:** Chrome-plated brass for durability and tactile feedback. * **Terminals:** Epoxy sealed to prevent flux or contaminants from entering the switch body during the soldering process. --- ### Application Usage These parts are commonly found in: 1. **Telecommunications:** Signal routing and power switching. 2. **Medical Equipment:** Interface control for portable diagnostic tools. 3. **Industrial Controls:** Mode selection on DIN-rail mounted controllers. 4. **Audio/Video:** Channel switching on compact mixing boards.