The part number **47LPQ-D2B-R/Q** typically refers to a high-density, low-profile **DIP Switch** or a specific **Rotary Coded Switch** variant often used in industrial control and telecommunications. Below is a detailed breakdown of the technical specifications and characteristics of this electronic component. --- ### 1. General Specifications The "47 Series" is often associated with specialized switching components designed for PCB (Printed Circuit Board) mounting. | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary Coded Switch / DIP Switch | | **Mounting Type** | Through-Hole (THT) | | **Actuator Style** | Flush or Low Profile (Screwdriver slot) | | **Contact Rating** | 100mA @ 50V DC (Non-switching) / 100mA @ 5V DC (Switching) | | **Insulation Resistance** | 1,000 MΩ Minimum | | **Operating Temp** | -40°C to +85°C | --- ### 2. Part Number Breakdown (Decoding) While naming conventions can vary slightly by manufacturer (such as Grayhill or similar specialized vendors), the code generally breaks down as follows: * **47L**: Series identifier (Low profile / Miniature). * **P/Q**: Indicates the orientation or the specific pinout configuration (often PC mount). * **D2B**: * **D**: Binary Coded Decimal (BCD) or Hexadecimal coding. * **2**: Number of positions (often 10 or 16 depending on the internal disk). * **B**: Terminal style or Base material. * **-R/Q**: * **R**: Denotes "Real" code (as opposed to Complementary). * **Q**: Typically refers to the packaging type (Tube or Tray) or a specific RoHS compliance marker. --- ### 3. Internal Logic Table (BCD Example) Most switches in this category use **Binary Coded Decimal**. When the dial is turned, specific pins are connected to the "Common" pin to represent a number. | Position | Pin 1 (1) | Pin 2 (2) | Pin 3 (4) | Pin 4 (8) | | :--- | :--- | :--- | :--- | :--- | | **0** | OFF | OFF | OFF | OFF | | **1** | ON | OFF | OFF | OFF | | **2** | OFF | ON | OFF | OFF | | **3** | ON | ON | OFF | OFF | | **9** | ON | OFF | OFF | ON | --- ### 4. Key Applications * **Address Setting:** Used on peripheral devices to set a unique ID or address on a communication bus. * **Configuration:** Setting baud rates, mode selection, or hardware overrides on industrial Motherboards. * **Testing:** Used in R&D to toggle hardware logic states without rewiring. --- ### 5. Mechanical Dimensions (Typical) * **Height:** Extremely low profile, usually under 3.5mm to allow for stacking of PCBs. * **Pitch:** Standard 2.54mm (0.1") pin spacing for compatibility with breadboards and standard PCB grids.