Based on the part number **A115K1CWCQ0Q**, this component belongs to the **A Series** of rotary switches manufactured by **C&K** (now part of Littelfuse). These are compact, multi-pole switches commonly used in industrial controls, medical equipment, and consumer electronics. --- ### 1. Component Specifications The part number is a coded string where each character defines a specific physical or electrical characteristic. | Feature | Specification | Description | | :--- | :--- | :--- | | **Series** | A | 1-4 Pole Rotary Switch | | **Switch Function** | 115 | 3 Position, 30° Indexing (Single Pole) | | **Actuator** | K1 | 0.750" (19.05mm) Long, Flatted Plastic Shaft | | **Bushing** | CW | 3/8-32 Threaded, With Keyway | | **Contact Material** | Q | Silver-Plated (Power/Standard use) | | **Termination** | Q | Solder Lug | --- ### 2. Electrical Characteristics These switches are designed for moderate power levels, often used for mode selection or power switching. * **Contact Rating:** 2.5 Amps @ 125 V AC; 350 mA @ 125 V DC. * **Electrical Life:** 15,000 make-and-break cycles at full load. * **Contact Resistance:** Below 20 mΩ (initial). * **Insulation Resistance:** $10^9$ Ω minimum. * **Dielectric Strength:** 1,000 Vrms @ sea level. --- ### 3. Physical Features * **Indexing:** 30 degrees (Standard for 12-position maximum wheels). * **Stopping:** Fixed stops (The "115" code indicates a specific range of motion). * **Mounting:** Panel mount via the threaded bushing. * **Environmental:** Operating temperature typically ranges from -30°C to +85°C. --- ### 4. Typical Applications Due to the **Silver (Q)** contact material, this part is optimized for power applications rather than low-level logic signals (where Gold plating would be preferred). Common uses include: 1. **Industrial Equipment:** Speed selectors or mode controllers. 2. **Test Instruments:** Range selection for multimeters or oscilloscopes. 3. **Consumer Goods:** Fan speed controls or lighting mode selection. ---