The **A10705-RSCG-E** is a specific part number for a high-quality **Rotary Switch** manufactured by **C&K** (now part of Littelfuse). These switches are commonly used in industrial controls, medical equipment, and high-end consumer electronics. Below is a detailed technical breakdown of its electronic and mechanical specifications. --- ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | C&K (Littelfuse) | | **Series** | A Series | | **Number of Positions** | 7 Positions | | **Number of Poles** | 1 Pole | | **Contact Timing** | Shorting (Make-before-break) | | **Angle of Throw** | 30° | | **Contact Rating** | 2.5A @ 125VAC; 350mA @ 125VDC | | **Mounting Type** | Through-hole (PCB Mount) | | **Termination Style** | PC Pin (Right Angle) | --- ### 2. Key Component Features #### A. Contact Material and Logic * **Shorting (Make-before-break):** This is a critical electronic feature. As you turn the dial, the switch momentarily connects the new circuit before disconnecting the old one. This prevents "floating" signals or electrical noise during the transition. * **Silver Plating:** Typically uses silver-plated contacts to ensure low contact resistance and high reliability over thousands of cycles. #### B. Mechanical Interface * **Actuator Type:** Flatted shaft, allowing for easy installation of standardized knobs. * **Rotational Torque:** Designed with a tactile "detent" feel, ensuring the user can feel exactly when the switch has clicked into the next position. #### C. Environmental & Durability * **Life Cycle:** Usually rated for **15,000 cycles** at full load. * **Bushing:** Features a 3/8-32 threaded bushing for secure panel mounting if required, though the "E" suffix often indicates specific epoxy sealing or lead-free compliance. --- ### 3. Part Number Breakdown (Deciphering the Code) Understanding the nomenclature helps in identifying the exact variant: 1. **A107:** Series prefix (A Series) and basic configuration (1 Pole, 7 Positions). 2. **05:** Actuator length (standard .500" flatted shaft). 3. **RSC:** **R**ight Angle, **S**horting contacts, **C** PC Thru-hole terminals. 4. **G:** Gold over Silver contact material (provides better shelf life and reliability in low-power applications). 5. **E:** Epoxy terminal seal (prevents solder flux from entering the switch housing during manufacturing). --- ### 4. Common Applications * **Test Equipment:** For switching between different measurement modes (Voltage, Amperage, etc.). * **Audio Mixers:** For input source selection. * **Industrial Panels:** To control motor speeds or machine states across 7 different stages. ---