The **A10703-RSCBF** is a specific part number for a rotary switch manufactured by **CK (C&K Components)**, now part of Littelfuse. This component is widely used in industrial controls, medical equipment, and consumer electronics where multi-position manual switching is required. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Circuit Type** | SP7T (Single Pole, 7 Position) | | **Number of Poles** | 1 | | **Number of Positions** | 7 | | **Switching Angle** | 30° | | **Contact Rating** | 2.5A @ 125VAC; 350mA @ 125VDC | | **Termination Style** | PC Pin (Through-hole mounting) | | **Actuator Type** | Flatted (1-1/4" / 31.75mm length) | | **Contact Material** | Silver Plated (Standard) | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details about the mechanical and electrical configuration: * **A107**: **A Series** (1-4 poles, rotary). **107** specifically denotes a Single Pole with 7 Active Positions. * **03**: Refers to the **Actuator Length**. In this case, it is a 1.250" (31.75mm) long flatted shaft. * **RS**: Refers to the **Mounting/Actuator Style**. "R" indicates a specific shaft style, and "S" usually denotes a slotted/flatted end. * **CB**: Refers to the **Contact Material**. Typically, "C" stands for Copper with Gold or Silver plating, and "B" indicates the specific terminal plating (Gold over Silver). * **F**: Often denotes a **Fixed Stop** or a specific mechanical feature regarding the rotation limits. --- ### 3. Electrical & Mechanical Properties #### Mechanical Characteristics - **Rotational Life:** Typically rated for 15,000 cycles (minimum). - **Indexing:** The 30° indexing provides a tactile "click" between each of the 7 positions. - **Stop Mechanism:** It features a fixed stop, meaning it cannot rotate 360 degrees; it stops at position 1 and position 7. #### Electrical Characteristics - **Shorting vs. Non-Shorting:** This model is typically **Non-Shorting** (Break-Before-Make), meaning the connection to the previous position is broken before the connection to the next position is established. - **Dielectric Strength:** Usually 1,000 V RMS at sea level. --- ### 4. Common Applications * **Test & Measurement:** Selecting different input ranges or modes on an oscilloscope or multimeter. * **Home Appliances:** Speed controls for fans or temperature settings for heaters. * **Audio Equipment:** Selecting input channels (Aux, Phono, CD) on an amplifier. * **Industrial Panels:** Mode selection (Manual, Auto, Off) for heavy machinery.