The **D4G0112N-R60C** is a high-quality, military-grade rotary switch manufactured by **Electroswitch**. This specific model belongs to their "D4" series, known for its robustness and reliability in demanding environments. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Electroswitch | | **Series** | D4 Series | | **Number of Positions** | 12 Positions | | **Number of Poles** | 1 Pole | | **Number of Decks** | 1 Deck | | **Contact Timing** | Non-Shorting (Break-before-make) | | **Termination Style** | Solder Lug | | **Voltage Rating** | 125 VAC / 28 VDC | | **Current Rating** | 500 mA (0.5A) | --- ### 2. Functional Components #### A. Contact Mechanism * **Non-Shorting (BBM):** This part ensures that the connection to the previous position is broken before the connection to the next position is made. This prevents accidental momentary shorts between circuits. * **Silver Plated Contacts:** Used to provide low contact resistance and prevent oxidation over long-term use. #### B. Mechanical Housing * **Rotary Action:** Features a 30-degree index angle between each of the 12 positions. * **Open Frame Construction:** The "decks" are visible and accessible, which allows for easier inspection and cleaning compared to sealed plastic switches. * **Ruggedized Design:** Built to meet or exceed MIL-DTL-3786 standards, making it resistant to shock, vibration, and thermal extremes. #### C. Mounting and Interface * **Panel Mount:** Designed to be mounted through a hole in a chassis or panel, secured by a hex nut and locking washer. * **Solder Lugs:** The terminals are designed for manual wire soldering, providing a high-integrity mechanical and electrical bond. --- ### 3. Common Applications Due to its high reliability and precise indexing, the D4G0112N-R60C is typically found in: * **Test & Measurement Equipment:** Selecting between different voltage ranges or signal inputs. * **Industrial Controls:** Manual mode selection for heavy machinery. * **Communication Systems:** Band switching or channel selection in radio frequency (RF) equipment. * **Aerospace & Defense:** Control panels where failure is not an option. ---