The part number **M2TT-61-R2/BN** refers to a high-quality, miniature toggle switch typically manufactured by **NKK Switches**. These components are widely used in industrial controls, medical equipment, and high-reliability consumer electronics. --- ### 1. Key Technical Specifications Based on the standard nomenclature for the M2 series, here are the electronic and mechanical characteristics: | Feature | Specification | | :--- | :--- | | **Switch Type** | Toggle Switch (Miniature) | | **Circuit Configuration** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON - ON (Maintained) | | **Current Rating** | 6A @ 125V AC / 3A @ 250V AC | | **Contact Resistance** | 10 milliohms maximum | | **Dielectric Strength** | 1,000V AC minimum between contacts | | **Mechanical Life** | 100,000 operations minimum | --- ### 2. Physical Design Elements The suffix codes in the part number define the specific physical attributes of this unit: * **R2 (Actuator):** This indicates a **Flatted Lever** style. Unlike standard round toggles, this has a flat surface which provides a distinct aesthetic and tactile feel. * **BN (Hardware/Finish):** This usually refers to the bushing type or the specific hardware kit included (e.g., nickel-plated brass). * **Terminal Type:** This series typically features **PC Terminals** (through-hole) or **Solder Lugs**, depending on the exact sub-variation. --- ### 3. Electronic Materials and Safety The internals of the switch are designed for longevity and signal integrity: 1. **Contacts:** Usually silver alloy or gold over silver. Silver is used for power applications, while gold is preferred for low-level (logic) signals to prevent oxidation. 2. **Case Material:** High-grade Diallyl Phthalate (DAP) resin, which offers excellent insulation resistance and heat tolerance during soldering. 3. **Sealing:** These switches often feature an internal epoxy seal at the base of the terminals to prevent flux or contaminants from entering the switch chamber. --- ### 4. Application Use-Cases * **Signal Routing:** Switching between two different audio or data paths. * **Power Control:** Acting as a main power toggle for small appliances or laboratory instruments. * **Control Panels:** Used in CNC machinery or industrial interfaces where tactile feedback is required.