The **M2TT-85-R2/BL** refers to a specific series of miniature toggle switches, typically manufactured by companies like **Nippon Kaiheiki (NKK Switches)**. These components are designed for PCB mounting and are known for their high reliability in logic-level applications. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Switch Type** | Toggle Switch | | **Circuitry** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON - NONE - ON | | **Contact Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Mounting Type** | Through-hole, Vertical PC Mount | | **Actuator Style** | Bat Lever / Standard Toggle | | **Terminal Type** | PC Pin (Gold Plated) | --- ### 2. Detailed Electronic Characteristics #### A. Logic Level Rating (0.4VA) Unlike power switches, this part is specifically engineered for **logic-level switching**. The contacts are usually gold-plated to prevent oxidation and ensure a stable electrical connection when switching very low currents (milliamps). #### B. DPDT Configuration The "DPDT" (Double Pole, Double Throw) configuration means the switch controls two separate circuits simultaneously. Each "pole" can toggle between two different output paths. #### C. Environmental & Mechanical Durability * **Sealing:** These switches often feature an automated cleaning-compatible design, meaning they can withstand soldering and washing processes. * **Mechanical Life:** Typically rated for 50,000 to 100,000 cycles. * **Dielectric Strength:** Usually rated at 1,000V AC between contacts. --- ### 3. Application Use Cases Due to its small footprint and high reliability, the M2TT-85-R2/BL is commonly used in: 1. **Handheld Devices:** Where space is limited. 2. **Medical Instrumentation:** For precise mode selection. 3. **Telecommunications:** For signal routing on circuit boards. 4. **Industrial Controls:** As a configuration or reset switch. --- ### 4. Part Number Breakdown (Typical) * **M2:** Series identifier (Miniature Process Toggles). * **T:** Toggle type. * **T:** Terminal spacing/style. * **85:** Specific circuit/actuator configuration (DPDT, ON-ON). * **R2:** Bracket or Mounting style (Vertical/Right Angle variation). * **BL:** Color or Finish designation (often referring to the bushing or lever cap).