The **47DM-111A-R/Q** refers to a specific series of **Rotary DIP Switches**, commonly manufactured by brands like *Sabrewatch* or distributed through specialized electronic component channels. These parts are used to manually set binary or hexadecimal values on a circuit board. --- ### 1. Technical Specifications The part number usually breaks down into specific physical and electrical characteristics: | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Rotary DIP Switch | | **Number of Positions** | 10 Positions (BCD) or 16 Positions (Hexadecimal) | | **Actuator Style** | Arrow/Flat Head (Screwdriver adjusted) | | **Mounting Type** | Through-Hole (THT) or Surface Mount (SMT) | | **Contact Rating** | 100mA @ 50V DC (Non-switching) | | **Output Code** | Real Code (Binary Coded Decimal) | | **Operating Temp** | -25°C to +70°C | --- ### 2. Key Components & Construction The "47DM" series generally follows a standard internal architecture: 1. **Rotor:** The top dial that is rotated to the desired digit. 2. **Contacts:** Gold-plated or silver-plated internal wipers that complete the circuit between the common pin and the output pins (1, 2, 4, 8). 3. **Housing:** High-temperature plastic (usually UL94V-0 rated) to withstand soldering processes. 4. **Seal:** Often features an O-ring or epoxy base to prevent flux contamination during washing. --- ### 3. Pin Logic (Binary Coded Decimal) When you turn the dial, the switch connects the "Common" (C) pin to a combination of output pins to represent the decimal number in binary: | Dial Position | Pin 1 | Pin 2 | Pin 4 | Pin 8 | | :--- | :--- | :--- | :--- | :--- | | **0** | Open | Open | Open | Open | | **1** | **Closed** | Open | Open | Open | | **3** | **Closed** | **Closed** | Open | Open | | **8** | Open | Open | Open | **Closed** | --- ### 4. Applications These parts are typically found in industrial and telecommunications equipment where permanent or semi-permanent settings are required without the need for a digital interface: * **Address Settings:** Setting the unique ID for a device on a bus (like RS-485 or CAN bus). * **Configuration:** Selecting modes of operation for industrial timers or sensors. * **Access Control:** Manual code settings in security hardware. --- ### 5. Identification Suffixes * **-R:** Often denotes "Real Code" (logic high when contact is made). * **-Q:** Often relates to the packaging (e.g., Tube or Tape & Reel) or a specific lead-free/RoHS compliance certification.