The **D5G0108S-R** is a specialized rotary switch typically manufactured by companies like **Electroswitch**. It is designed for high-reliability applications where multiple circuit paths must be selected through manual rotation. Below is a detailed breakdown of its electronic parts, specifications, and construction. --- ### 1. Technical Specifications The D5G0108S-R belongs to a category of "open-frame" or "wafer" rotary switches. | Parameter | Specification | | :--- | :--- | | **Switch Type** | Rotary Switch | | **Number of Positions** | 8 | | **Number of Poles** | 1 | | **Number of Decks** | 1 | | **Contact Timing** | Shorting (Make-Before-Break) | | **Mounting Type** | Panel Mount | | **Termination Style** | Solder Lug | | **Angle of Throw** | 30° or 45° (Standard D5 Series) | --- ### 2. Key Electronic Components & Materials The performance of the D5G0108S-R is defined by the materials used in its internal parts: #### A. The Wafer (Stator) * **Material:** Usually made of **Diallyl Phthalate (DAP)** or ceramic. These materials provide high dielectric strength and resistance to carbon tracking. * **Function:** It acts as the non-conductive base that holds the fixed contacts in place. #### B. Contacts (Fixed and Moving) * **Material:** Often silver-plated brass or solid silver alloy. * **"Shorting" Mechanism (R-suffix):** The "S-R" in the part number often indicates a **Shorting** contact arrangement. This means that as you turn the dial, the moving contact touches the next position before it leaves the current one, preventing "dead spots" or electrical spikes during switching. #### C. The Rotor * **Material:** A central disc connected to the shaft. * **Function:** It carries the "wiper" (the moving contact) that bridges the electrical connection between the common terminal and the selected output position. #### D. Indexing Mechanism * **Parts:** Includes a detent wheel, spring, and ball bearings. * **Function:** This provides the "click" feel and ensures the switch stays locked in a specific position rather than floating between them. --- ### 3. Part Number Breakdown (D5G0108S-R) While coding varies by manufacturer, the nomenclature generally follows this logic: | Code | Meaning | | :--- | :--- | | **D5** | Series designation (Size and Power rating) | | **G** | Contact Material / Plating (often Gold or Silver) | | **01** | Number of Poles (1 Pole) | | **08** | Number of Positions (8 Positions) | | **S** | Shorting (Make-before-break) | | **R** | RoHS Compliant / Specific Terminal Orientation | --- ### 4. Common Applications Due to its robust construction, this part is frequently found in: * **Test Equipment:** Selecting voltage ranges or signal modes. * **Audio Equipment:** Input selection or gain stepping. * **Industrial Controls:** Manual mode selection for machinery. * **Avionics:** Cockpit controls where high vibration resistance is required. ---