The **W2TS-3BB-R** is a specific model within the **W2TS series** of miniature toggle switches, typically manufactured by companies like **Nidec Components (formerly Copal Electronics)**. These switches are designed for PC board mounting and are known for their compact size and reliability. --- ### 1. Part Number Breakdown Understanding the suffix codes helps identify the specific electrical and physical characteristics: | Code Segment | Description | | :--- | :--- | | **W2TS** | Series designation (Washable Miniature Toggle Switch) | | **3** | Function: **DPDT** (Double Pole Double Throw) | | **BB** | Terminal/Mounting Style: Straight PC terminals with a bracket | | **R** | Packaging/RoHS: RoHS compliant | --- ### 2. Key Technical Specifications The "W" in the series prefix often indicates a **washable** design, meaning the part is sealed to withstand soldering and cleaning processes. | Feature | Specification | | :--- | :--- | | **Contact Configuration** | DPDT (On-On) | | **Current Rating** | Typically 0.4VA Max (Logic Level) | | **Voltage Rating** | 20V AC/DC Max | | **Contact Resistance** | 20 mΩ Max | | **Insulation Resistance** | 1,000 MΩ Min | | **Dielectric Strength** | 500V AC for 1 minute | | **Mechanical Life** | 50,000 cycles | | **Operating Temperature** | -20°C to +85°C | --- ### 3. Electronic Design Features * **Gold-Plated Contacts:** Because this switch is rated for 0.4VA (low power), it usually features gold over nickel plating. This ensures high contact reliability in "dry circuit" applications where there isn't enough voltage to arc through oxidation. * **Twin-Contact Mechanism:** Many switches in this series utilize a clip-style or twin-contact mechanism to ensure a stable connection even under vibration. * **Sealed Construction:** The body is typically sealed with an O-ring (actuator) and epoxy (base), making it immersion-cleanable after wave soldering. * **Support Bracket:** The "BB" designation indicates a support bracket. This provides mechanical stability when the switch is toggled, preventing the solder joints from cracking due to physical stress. --- ### 4. Applications This part is commonly found in industrial and telecommunications equipment, specifically: * Handheld diagnostic tools. * Control panels for medical devices. * Telecommunication switching systems. * Reset or mode-selection switches on embedded PCBs.