The **47LPQ-42G-R** is a specific part number typically associated with **Grayhill 47L series** electromechanical components, specifically **Rotary Switches** or **Rotary Encoders**. This specific configuration is part of a low-profile, high-performance line often used in avionics, medical devices, and communication equipment. --- ### 1. Component Identification | Feature | Description | | :--- | :--- | | **Series** | 47L (Low Profile Rotary) | | **Model Type** | LPQ (Usually indicates specific mounting and terminal style) | | **Positions/Detents** | 42 (Indicating 42 degrees of throw or a specific step count) | | **Termination** | G (Gold-plated contacts or specific PC mount) | | **Compliance** | R (RoHS Compliant) | --- ### 2. Technical Specifications While exact specifications can vary based on the manufacturer's sub-catalog, the 47L series generally follows these parameters: * **Mechanical Life:** Typically rated for 25,000 to 100,000 cycles. * **Contact Material:** Gold-plated over silver or brass (ensures low contact resistance and prevents oxidation). * **Operating Temperature:** Generally ranges from **-40°C to +85°C**. * **Sealing:** Often features an IP67 rating (waterproof/dustproof) if specified with an "S" or similar prefix, though the standard LPQ is usually splash-proof. * **Mounting:** Through-hole PCB mounting. --- ### 3. Key Electronic Characteristics These parts are designed for low-power signal switching rather than high-power loads. * **Current Rating:** Usually around **150mA at 115 VAC** or **200mA at 28 VDC**. * **Contact Resistance:** < 50 mΩ (initial). * **Insulation Resistance:** 1,000 MΩ minimum. * **Dielectric Strength:** 1,000 VAC between mutually insulated parts. --- ### 4. Typical Applications The **47LPQ-42G-R** is used where space is at a premium and high reliability is required: 1. **Handheld Radios:** Frequency tuning or volume control. 2. **Medical Imaging:** Parameter selection on control panels. 3. **Aerospace Cockpits:** Mode selection switches for navigation or communication. 4. **Test Equipment:** Range selection for multimeters or oscilloscopes. --- ### 5. Part Number Breakdown Example If we analyze the logic of the Grayhill system for this series: ```text 47L - Series (Low Profile) P - PC Terminals Q - Quadrate (Square body) or specific detent logic 42 - 42-degree angle of throw G - Gold contacts (essential for dry-circuit/low voltage) R - RoHS Compliant ```