The **3P3B-R** is a specific model of a **Miniature Toggle Switch**. It is widely used in electronic circuits to control power flow or signal routing. The alphanumeric code typically breaks down the physical and electrical characteristics of the switch. --- ### 1. Technical Specifications Below are the general specifications typical for the 3P3B-R series: | Parameter | Specification | | :--- | :--- | | **Circuitry** | 3PDT (Triple Pole Double Throw) | | **Switch Function** | ON-ON (2 Positions) | | **Contact Rating** | 5A @ 125VAC or 28VDC; 2A @ 250VAC | | **Contact Resistance** | 10 mΩ max. | | **Insulation Resistance** | 1,000 MΩ min. | | **Dielectric Strength** | 1,500 V RMS @ sea level | | **Operating Temperature** | -30°C to +85°C | --- ### 2. Breakdown of the Name (3P3B-R) * **3P (3-Pole):** This indicates that the switch can control three separate electrical circuits simultaneously. * **3B:** Often refers to the specific physical configuration or the "ON-ON" internal logic. * **-R (RoHS Compliant):** Indicates that the part is manufactured in compliance with the Restriction of Hazardous Substances directive (lead-free). --- ### 3. Circuit Configuration (3PDT) As a **3PDT** switch, it features 9 terminals arranged in a 3x3 grid. When the toggle is flipped, it moves the common pins to connect with either the top or bottom set of terminals. #### Terminal Map: ```text [ Terminal 1 ] [ Terminal 4 ] [ Terminal 7 ] <- Position A [ Terminal 2 ] [ Terminal 5 ] [ Terminal 8 ] <- Common (Input) [ Terminal 3 ] [ Terminal 6 ] [ Terminal 9 ] <- Position B ``` --- ### 4. Common Applications Due to its ability to toggle three circuits at once, it is frequently used in: * **Industrial Controls:** Switching between different machine modes. * **Audio Equipment:** True bypass switching or routing stereo signals plus an LED indicator. * **Telecommunications:** Signal path redundancy. * **DIY Electronics:** Powering multiple components with a single physical toggle.