The **M2TT-4D-R2/BN** is a specific electronic component within the **M2 series** of miniature toggle switches, manufactured by **Nidec Components (formerly Copal Electronics)**. Below is the detailed breakdown of its electronic and mechanical specifications. --- ### 1. Technical Specifications This part is a specialized toggle switch designed for PCB mounting with a focus on space-saving and durability. | Feature | Specification | | :--- | :--- | | **Circuit Configuration** | DPDT (Double Pole, Double Throw) | | **Switch Function** | ON - ON (2-Position) | | **Current/Voltage Rating** | Max: 6A @ 125VAC or 3A @ 250VAC | | **Logic Level Rating** | Max: 0.4VA @ 28VDC (for gold-plated models) | | **Contact Resistance** | 10 mΩ maximum | | **Dielectric Strength** | 1,000V AC for 1 minute | | **Insulation Resistance** | 1,000 MΩ minimum | | **Operating Life** | 50,000 cycles (Mechanical), 25,000 cycles (Electrical) | --- ### 2. Part Number Breakdown The suffixing and prefixing of this specific model determine its hardware configuration: * **M2**: Series designation (Miniature Toggle Switch). * **TT**: Twin-toggle or standard toggle (referencing the lever style). * **4**: Denotes a 4-pole or specific DPDT internal architecture depending on the frame size. * **D**: Functionality code (Standard ON-ON). * **R2**: Refers to the **Right Angle (Horizontal)** PCB terminal orientation. This means the switch sits parallel to the board when mounted. * **BN**: Bracket/Nut configuration, typically indicating a specific mounting hardware kit or a bushing style (Threaded/Non-threaded). --- ### 3. Key Electronic Characteristics #### A. Contact Material This model usually features **Silver contacts** (Standard) or **Gold-over-silver**. The "BN" variant is often optimized for high-reliability low-power signals, preventing oxidation in logic-level circuits. #### B. PC Board Termination The **R2** designation is critical for PCB designers. Unlike vertical switches, the pins are bent at a 90-degree angle. This allows the switch to be toggled from the edge of a device casing while the PCB sits flat. #### C. Environmental Sealing The M2 series features an **ultrasonic welding** structure for the housing, which provides: * Protection against solder flux entry. * Stability during the cleaning process post-soldering. --- ### 4. Typical Applications * **Industrial Controls:** Panel-mounted logic switching. * **Telecommunications:** Network equipment configuration resets. * **Medical Devices:** Handheld diagnostic tools requiring robust mechanical feedback. * **Audio/Visual:** Signal routing in professional mixing consoles.