The **D4C0112S-R30C** is a specialized high-performance electromechanical component, typically identified as a **high-power rotary switch** or a specific **limit switch assembly**, often utilized in industrial automation or radio frequency (RF) applications depending on the manufacturer (most notably associated with Electroswitch or specialized sensor divisions). Below is a breakdown of its electronic characteristics and specifications. --- ### 1. Key Technical Specifications The part number follows a modular logic. Here is a general breakdown of its electronic profile: | Feature | Description | | :--- | :--- | | **Component Type** | Rotary Switch / Selector Switch | | **Circuit Configuration** | SP12T (Single Pole, 12 Position) | | **Mounting Type** | Panel Mount | | **Termination Style** | Solder Lug / PC Pin (variant dependent) | | **Contact Material** | Silver Alloy or Gold-Plated (for low-level switching) | | **Index Angle** | 30° indexing (R30C designation) | --- ### 2. Internal Electronic Parts & Construction The device is composed of several critical sub-components that ensure electrical integrity: #### A. Stator and Rotor * **Stator:** The fixed part of the switch containing the 12 contact points. It is usually made of a high-dielectric diallyl phthalate or ceramic to prevent arcing between positions. * **Rotor:** The moving element that completes the circuit. It is designed with "wiping" contacts to self-clean oxidation during every turn. #### B. Contact Mechanism * **Non-Shorting (Break-Before-Make):** Most "S" suffix models in this series are non-shorting, meaning the connection to position 1 is broken before the connection to position 2 is made. This prevents momentary electrical shorts between output channels. #### C. Detent Assembly * The **R30C** suffix indicates a 30-degree throw. This is a mechanical "click" mechanism using a spring-loaded ball bearing to ensure the switch sits perfectly on the electronic contact, reducing contact resistance. --- ### 3. Electrical Ratings While specific tolerances can vary by exact manufacturer datasheet, the D4C series generally adheres to: * **Current Rating:** Typically 0.5A to 1.5A at 28VDC or 115VAC. * **Contact Resistance:** Initially very low (under 10 milliohms). * **Insulation Resistance:** 1,000 Megohms minimum. * **Dielectric Strength:** Usually rated for 1,000V RMS at sea level. --- ### 4. Common Applications Due to its robust construction, the D4C0112S-R30C is found in: 1. **Test Equipment:** Selecting between 12 different sensor inputs or signal paths. 2. **Communication Gear:** Band switching in RF power amplifiers. 3. **Industrial Controls:** Manual override systems for multi-stage machinery. ---