The part number **M2TT-23-R2/BN** refers to a high-quality, miniature toggle switch typically manufactured by companies like **NKK Switches**. These components are designed for PCB mounting and offer high reliability in logic-level applications. --- ### 1. Technical Specifications Below are the primary electrical and mechanical characteristics of the M2 series toggle switch: | Feature | Specification | | :--- | :--- | | **Switch Type** | Toggle Switch (Miniature) | | **Circuit Configuration** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON - OFF - ON (Three positions) | | **Current Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Contact Resistance** | 20 milliohms maximum | | **Insulation Resistance** | 1,000 Megohms minimum @ 500V DC | | **Dielectric Strength** | 1,000V AC minimum for 1 minute | | **Operating Temperature** | -30°C to +85°C | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details regarding the build and finish: * **M2**: Series designation (Miniature Process Sealed Toggles). * **TT**: Toggle type (identifies the lever style, usually a standard bat or short toggle). * **23**: Circuit identifier (denotes the **DPDT** configuration with **ON-OFF-ON** positions). * **R2**: Mounting/Terminal type (Right Angle PCB Mount). * **BN**: Material finish or specific aesthetic options (often refers to a nickel-plated finish or specific bushing/actuator colors depending on the manufacturer's sub-catalog). --- ### 3. Key Features & Construction * **Process Sealed:** These switches are generally constructed with an O-ring and ultrasonic welding, making them washable and resistant to flux contamination during soldering. * **Carbon-Impregnated Bushing:** Helps in dissipating static electricity, protecting the internal logic-level contacts. * **Gold Plated Contacts:** Since the device is rated for **0.4VA (Logic Level)**, the contacts are gold-plated to prevent oxidation and ensure a stable connection at very low voltages. * **Ergonomics:** The "TT" designation often implies a small footprint suitable for high-density boards where space is a premium. --- ### 4. Typical Applications Because of its small size and logic-level rating, this switch is commonly used in: 1. **Handheld Devices:** For mode selection or power toggling. 2. **Medical Instrumentation:** Where reliability and cleanliness (washable) are required. 3. **Telecommunications:** Signal routing on PCB backplanes. 4. **Audio/Visual Equipment:** For channel switching or gain settings.