The **D4G0112S-R30F** is a specific model of a **Rotary Switch** manufactured by **Electroswitch**. This component is widely used in industrial and professional audio equipment where high reliability and manual control over multiple circuits are required. --- ### ## Technical Specifications Below are the primary technical parameters for the D4G0112S-R30F: | Feature | Specification | | :--- | :--- | | **Manufacturer** | Electroswitch | | **Switch Type** | Rotary Switch | | **Number of Positions** | 2 to 12 (Adjustable) | | **Number of Decks** | 1 Deck | | **Number of Poles** | 1 Pole | | **Actuator Type** | Flatted Shaft (F-Shaft) | | **Contact Timing** | Shorting (Make-before-break) | | **Current Rating** | 0.5A @ 125VAC; 0.25A @ 250VAC | | **Termination Style** | Solder Lug | | **Mounting Type** | Panel Mount | --- ### ## Detailed Breakdown of Features ### 1. Circuit Configuration (1 Pole, 12 Positions) The "0112" in the part number indicates **1 Pole** and **12 Positions**. This means the switch has one common input that can be rotated to connect to 12 different output pins. The "S" suffix often denotes **Shorting** contacts, which maintain a connection with the previous position until the next one is fully engaged, preventing "pops" or circuit interruptions. ### 2. Mechanical Design * **Indexing:** It typically features a 30-degree angle of throw between each position ($12 \text{ positions} \times 30^\circ = 360^\circ$). * **R30F Code:** * **30**: Refers to the $30^\circ$ indexing angle. * **F**: Refers to a **Flatted** shaft, which ensures that a knob with a set-screw will not slip during operation. ### 3. Materials and Durability * **Contacts:** Usually made from silver-plated brass or silver alloy to ensure low contact resistance and long life. * **Insulation:** High-grade thermoset plastic or ceramic is used to provide high dielectric strength and heat resistance during soldering. --- ### ## Typical Applications Due to its robust construction and precise indexing, this part is commonly found in: * **Test Equipment:** Selecting different voltage ranges or measurement modes. * **Communication Radios:** Channel selection. * **Pro Audio:** Selecting input sources or gain stages in preamplifiers. * **Industrial Controls:** Manual sequence control for machinery. ---