The **A10703-RSCB-E** is a specific electronic component within the rotary switch category, manufactured by **C&K** (now part of Littelfuse). It belongs to the **A Series** of rotary switches, which are widely used for industrial, medical, and consumer control panels. --- ### 1. Technical Specifications Below are the primary technical characteristics of the A10703-RSCB-E: | Feature | Specification | |:---|:---| | **Manufacturer** | C&K / Littelfuse | | **Circuit / Poles** | Single Pole, 7 Position (SP7T) | | **Current Rating** | 2.5A (AC), 350mA (DC) | | **Voltage Rating** | 125V AC / 125V DC | | **Actuator Type** | Round (Short) Actuator | | **Contact Material** | Silver Plated (Standard) | | **Termination Style** | PC Pin (Through-hole mounting) | | **Indexing Angle** | 30° | --- ### 2. Breakdown of the Part Number The part number is alphanumeric, where each segment represents a specific mechanical or electrical configuration: * **A**: Product Series (A Series Multi-pole Rotary Switch). * **107**: **1** indicates a single pole; **07** indicates 7 active positions. * **03**: Actuator length and style (in this case, a .375" high plastic actuator). * **RS**: Round Shaft (design of the physical turning point). * **CB**: Contact Material/Plating (Typically Gold over Silver for improved conductivity and corrosion resistance). * **E**: Epoxy Seal (Terminal seal to prevent flux contamination during soldering). --- ### 3. Key Electronic Features * **Shorting vs. Non-Shorting:** This model typically features **Non-Shorting (Break-Before-Make)** contacts. This means the connection to the first position is broken before the connection to the second position is made, preventing momentary electrical shorts between circuits. * **PC Mounting:** The pins are designed for direct soldering onto a Printed Circuit Board (PCB). * **Durability:** It is rated for approximately 15,000 cycles at full load, making it suitable for high-reliability applications. --- ### 4. Common Applications Due to its 7-position configuration and PCB-mount design, it is frequently used in: 1. **Test Equipment:** Selecting between different measurement modes (Voltage, Current, Resistance). 2. **Audio Gear:** Channel selection or gain stepping. 3. **Industrial Controls:** Speed settings or mode selection for heavy machinery.