Based on the part number provided, this component belongs to a series of **Miniature Toggle Switches** typically manufactured by companies like **NKK Switches**. The **M2** series represents high-quality, process-sealed toggle switches designed for PCB mounting. --- ## Technical Specifications: M2TT-45-R2/N The breakdown of the part number reveals specific electrical and mechanical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Series** | M2 | Miniature Process Sealed Toggle Switch | | **Pole Configuration** | Double Pole (DP) | Controls two separate circuits simultaneously | | **Circuit / Function** | DPDT (On-Off-On) | Three-position switch with a center "Off" position | | **Terminal Type** | R2 (Right Angle) | Designed for horizontal PCB mounting (.100" spacing) | | **Actuator** | Bat Lever | Standard toggle handle for manual operation | | **Contact Material** | Gold or Silver | Usually features gold-plated contacts for low-level logic | --- ## Key Electronic Characteristics ### 1. Contact Ratings These switches are generally designed for low-to-medium power applications: * **Logic Level:** Often rated at 0.4VA maximum @ 28V AC/DC. * **Power Level:** If silver contacts, up to 6A @ 125V AC. * **Insulation Resistance:** 1,000 Megohms minimum at 500V DC. ### 2. Environmental Sealing The "Process Sealed" nature is a critical electronic feature. The switch is constructed with: * **Ultrasonic Welding:** The base and cover are welded to prevent flux or cleaning solvents from entering the contact area during automated soldering. * **O-Ring Seals:** Internal silicone rubber O-rings prevent liquid ingress through the toggle. ### 3. Circuit Logic (DPDT On-Off-On) The switch operates as follows: * **Position 1:** Circuit A closed, Circuit B closed. * **Position 2 (Center):** All circuits open (Off). * **Position 3:** Circuit C closed, Circuit D closed. --- ## Common Applications * **Medical Equipment:** Due to high reliability and sealing. * **Telecommunications:** Signal switching in compact enclosures. * **Test & Measurement:** Used for mode selection on handheld devices. * **Industrial Controls:** Integrated into control panels where PCB space is limited.