The **47LPQ-02B-R** is a specific electronic component, typically categorized as a **Rotary Switch** produced by Grayhill Inc. (a leading manufacturer in optical and mechanical encoders/switches). Below is a detailed breakdown of its specifications, design, and applications. --- ### 1. Component Overview The 47LPQ-02B-R belongs to the **Series 47L** family. It is a miniature, PCB-mounted rotary switch designed for low-power signal switching where space and reliability are critical. ### 2. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Grayhill Inc. | | **Series** | 47L (Miniature Rotary) | | **Number of Poles** | 1 Pole | | **Number of Positions** | 2 Positions | | **Termination Style** | PC Mount (Through-hole) | | **Contact Rating** | Usually rated for low current (e.g., 150mA at 115VAC) | | **Mounting Type** | Right Angle / Vertical (depending on exact suffix) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 3. Key Electronic Characteristics * **Logic Level Switching:** This part is primarily used for logic-level signals rather than power switching. It is designed to interface with microcontrollers or low-voltage analog circuits. * **Contact Material:** Usually features gold-plated or silver-plated contacts to ensure low contact resistance and prevent oxidation over long periods of inactivity. * **Sealing:** These switches are often "process sealed," meaning they can withstand automated soldering and cleaning processes (washable) without internal contamination. * **Indexing:** Features a positive "detent" feel, providing tactile feedback to the user when moving between positions. ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **47L** | Series designation (Linear/Rotary Miniature) | | **PQ** | Package/Mounting style (often refers to PC Mount, Right Angle) | | **02** | Number of active positions (2-position switch) | | **B** | Contact type or specific mechanical configuration | | **-R** | RoHS Compliant (Lead-free) | --- ### 5. Common Applications * **Industrial Controls:** Setting modes of operation on a control panel. * **Medical Equipment:** Selecting parameters on portable diagnostic devices. * **Test & Measurement:** Channel selection or range setting on handheld meters. * **Telecommunications:** Configuration switches on circuit boards or routers. ---