The **A10205-RSCGF** is a specific part number for a rotary switch manufactured by **C&K Components** (now part of Littelfuse). These switches are widely used in industrial equipment, medical devices, and consumer electronics for multi-position mode selection. ### 1. Component Overview The A10205-RSCGF is a sub-miniature rotary switch featuring a single-pole configuration with two positions. | Feature | Specification | | :--- | :--- | | **Manufacturer** | C&K / Littelfuse | | **Circuit / Pole** | SPDT (Single Pole, Double Throw) / 1 Pole | | **Number of Positions** | 2 | | **Contact Timing** | Non-Shorting (Break-before-make) | | **Switching Angle** | 30° or 36° (Standard for A series) | | **Termination Style** | PC Pin (Through-hole) | --- ### 2. Key Technical Specifications #### Electrical Characteristics * **Contact Rating:** 2.5 Amps @ 125 VAC; 350 mA @ 125 VDC. * **Contact Resistance:** Below 20 mΩ (initial). * **Insulation Resistance:** 10⁹ Ω min. * **Dielectric Strength:** 1,000 Vrms at sea level. #### Mechanical & Material Properties * **Actuator Type:** 1-inch Flatted Shaft (indicated by "05" in the part number). * **Contact Material:** **Gold over Silver (indicated by "G")**. This provides a balance between the high conductivity of silver and the corrosion resistance/low-signal reliability of gold. * **Mounting Type:** Panel mount with PC pins for board connection. * **Operating Temperature:** -30°C to +85°C. --- ### 3. Part Number Breakdown (Nomenclature) Understanding the code helps identify exact replacements or variations: | Code Segment | Meaning | | :--- | :--- | | **A1** | Series (A Series Rotary Switch) | | **02** | Number of positions (2 positions) | | **05** | Actuator length (1.000" / 25.4mm flatted shaft) | | **RS** | Mounting style (RoHS Compliant, PC Thru-hole) | | **C** | Termination style (PC Pin) | | **G** | Contact Material (Gold over Silver) | | **F** | Finish (Standard hardware included) | --- ### 4. Common Applications * **Test & Measurement:** Selecting between different voltage ranges or modes. * **Audio Equipment:** Input selection or gain stepping. * **Industrial Controls:** Power mode selection (Manual/Auto). * **Medical Electronics:** Settings adjustment on portable diagnostic tools. ---