The part number **441-R347B-GR** is typically associated with a specific type of **Rotary Switch** commonly manufactured by brands like Alpha (Taiwan Alpha) or distributed through electronic component catalogs like Mouser. Below is the detailed breakdown of its specifications and electrical characteristics. --- ### 1. General Product Specifications This component is a miniature rotary switch designed for PCB (Printed Circuit Board) mounting, often used in consumer electronics for mode selection. | Feature | Description | | :--- | :--- | | **Component Type** | Rotary Switch | | **Pole/Position** | 3 Pole / 4 Position | | **Mounting Type** | Through-Hole (PCB Mount) | | **Actuator Style** | Round Shaft (usually with a flat edge/D-Shaft) | | **Termination** | Solder Pins | --- ### 2. Electrical Characteristics The electrical ratings define the safety and operational limits of the switch. * **Rating:** 125V AC at 0.3A (Standard operational load). * **Contact Resistance:** Typically less than 50mΩ. * **Insulation Resistance:** 500V DC / 100MΩ minimum. * **Withstand Voltage:** 500V AC for 1 minute. * **Life Cycle:** Approximately 10,000 cycles (under load). --- ### 3. Mechanical Design & Materials The construction of the **-GR** suffix series often denotes specific environmental compliance or shaft variations. * **Rotation Angle:** 30° indexing (standard for 4-position switches). * **Shaft Length:** Generally 20mm to 30mm depending on the specific sub-batch (check datasheet for exact "L" dimension). * **Bushing:** Threaded for panel mounting with a nut and washer. * **RoHS Status:** The **-GR** suffix usually indicates **Green/RoHS Compliant** materials, meaning it is lead-free. --- ### 4. Common Applications Due to its 3-pole configuration, this switch can control three separate circuits simultaneously through four different states. 1. **Audio Equipment:** Input selectors for amplifiers or signal routing. 2. **Test Equipment:** Changing ranges on multimeters or oscilloscopes. 3. **Home Appliances:** Fan speed controls or lighting mode selectors. 4. **Industrial Controls:** Setting operational modes (Manual/Auto/Off). --- ### 5. Wiring Diagram Logic Since this is a **3-Pole 4-Position** switch, the pinout logic follows this structure: | Pole | Common Pin | Output Pins | | :--- | :--- | :--- | | **Pole 1** | A | 1, 2, 3, 4 | | **Pole 2** | B | 5, 6, 7, 8 | | **Pole 3** | C | 9, 10, 11, 12 | ---