The **A105P3CWCQ0Q** is a specific part number for a sub-miniature toggle switch manufactured by **TE Connectivity (Alcoswitch)**. It is designed for PCB mounting and is often used in instrumentation and control panels. --- ### 1. Technical Specifications Below is a breakdown of the electronic and physical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Circuit Function** | SPDT (Single Pole Double Throw) | | **Switch Function** | ON-OFF-ON | | **Current Rating** | 5A @ 120VAC or 28VDC; 2A @ 250VAC | | **Contact Plating** | Silver (Q - Contact Material) | | **Mounting Type** | Through Hole, Right Angle | | **Termination Style** | PC Pin | | **Actuator Height** | 11.43 mm (.450") | | **Operating Temperature** | -30°C to +85°C | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the exact configuration: * **A105**: Series designation (A Series Toggle Switch, SPDT). * **P3**: Actuator style (Flat toggle, large). * **CW**: Bushing style (Threaded or specific splash-proof variant). * **CQ**: Termination type (Right angle, PC pins). * **0**: No specific additional seal. * **Q**: Contact material (Silver, used for power applications). --- ### 3. Key Components & Materials * **Contacts:** Silver-plated copper alloy. Silver is used because it provides excellent conductivity for power-level switching (up to 5 Amps). * **Housing:** Glass-filled nylon (UL 94V-0), which is flame retardant. * **Actuator:** Chrome-plated brass for durability and a professional aesthetic. * **Support Bracket:** Tin-plated brass to ensure mechanical stability when soldered to a PCB. --- ### 4. Applications Due to its **ON-OFF-ON** configuration and **Right Angle** orientation, this part is commonly found in: 1. **Audio Equipment:** Selecting between different input sources. 2. **Industrial Controls:** Manual override switches for machinery. 3. **Medical Devices:** Power and mode selection where a physical tactile response is required. 4. **Test/Measurement Tools:** Switching between different measurement ranges or modes. ---