The **WMS2-6B-R/K** is a high-performance **Micro-Switch** (specifically a waterproof/sealed type) often used in automotive, industrial control, and home appliance applications. Below is a detailed breakdown of its electronic parts and specifications. --- ### 1. Technical Specifications The "WMS" series typically follows a standardized configuration for power rating and physical dimensions. | Feature | Specification | | :--- | :--- | | **Contact Rating** | Usually 0.1A to 6A (depending on load type) | | **Voltage Rating** | 125V / 250V AC or 12V / 24V DC | | **Contact Resistance** | ≤ 50mΩ (initial) | | **Insulation Resistance** | ≥ 100MΩ (500V DC) | | **Operating Force** | 150gf to 300gf (varies by sub-model) | | **Protection Class** | IP67 (Dust-tight and Water immersion resistant) | --- ### 2. Internal Electronic Parts & Components The device is composed of several critical internal elements that facilitate its switching function: 1. **Contact System (Common/NO/NC):** * **Fixed Contacts:** Stationary silver alloy points. * **Moving Contact:** A high-conductivity copper leaf spring that snaps between the NO (Normally Open) and NC (Normally Closed) positions. 2. **Actuator Mechanism:** * A plunger or lever that translates physical force into electrical state changes. In the "6B" variant, this is often a **roller lever** or a **simulated roller**. 3. **Housing & Sealing:** * **Body:** PBT (Polybutylene Terephthalate) or PPS for heat resistance. * **Epoxy Seal:** The "R/K" designation often indicates bottom-sealed terminals or a specific wire-lead exit, ensuring moisture does not penetrate the electrical contacts. 4. **Terminals:** * Brass or copper terminals, usually silver-plated or gold-plated for low-level signal integrity. --- ### 3. Model Suffix Breakdown While nomenclature varies slightly by manufacturer (e.g., Highly, Omron, or local vendors), the codes generally represent: * **WMS:** Waterproof Micro Switch series. * **2:** Size/Series identifier (typically sub-miniature). * **6B:** Specific actuator type (often a **Hinge Roller Lever**). * **R/K:** Terminal or Mounting configuration. * **R:** Right-side PCB terminals or specific lead wire orientation. * **K:** High-temperature rating or specific wiring color code (Black/White/Red). --- ### 4. Circuit Diagram Representation The switch typically operates in a **SPDT (Single Pole Double Throw)** configuration. ```c [ COM ] (Common) / / [ NC ] [ NO ] (Normal (Normal Closed) Open) ```