The **R2-1-R** series refers to a specific type of **Rocker Switch**, commonly manufactured by brands like **Shin Chin (SCI)** or distributed by electronics suppliers like NTE Electronics (e.g., NTE 54-411). These switches are widely used in power strips, automotive dashboards, and household appliances due to their simple "snap-in" mounting design and high current rating. --- ### 1. General Specifications The electronic characteristics of the R2-1-R series can vary slightly by model, but the core specifications are generally as follows: | Parameter | Typical Value | | :--- | :--- | | **Circuit Function** | SPST (Single Pole Single Throw) | | **Switch Action** | On-Off | | **Voltage Rating** | 125VAC / 250VAC | | **Current Rating** | 16A @ 125VAC / 10A @ 250VAC | | **Contact Resistance** | 50mΩ Max | | **Insulation Resistance** | 100MΩ Min at 500VDC | | **Dielectric Strength** | 1500VAC for 1 minute | | **Operating Temperature** | -20°C to +85°C | --- ### 2. Key Components and Construction The switch is comprised of several critical electronic and mechanical parts: * **Actuator (The Rocker):** Usually made of Polycarbonate (PC) or Nylon. In the "R" (Red) version, this is often a translucent red plastic to allow light through. * **Lamp/Illumination:** * **Neon Lamp:** Used for AC applications (125V/250V). It requires a built-in current-limiting resistor. * **LED:** Used for DC applications (usually 12V or 24V). * **Terminals:** Typically **Quick Connect** (0.250" or 6.3mm) spade terminals made of silver-plated copper alloy for high conductivity and corrosion resistance. * **Housing:** A snap-in plastic body designed to fit into a rectangular panel cutout (standard size approximately 11mm x 30mm). --- ### 3. Terminal Configuration A standard illuminated R2-1-R switch typically has **3 terminals**: 1. **Terminal 1 (Brass/Silver):** Power In (Line). 2. **Terminal 2 (Silver):** Power Out (Load) - connected to the device being powered. 3. **Terminal 3 (Brass/Gold-tone):** Neutral - this provides the return path for the internal lamp so it can light up when the switch is "On." --- ### 4. Part Number Breakdown (Example) The "R2-1-R" naming convention often follows this logic: * **R2:** The series designation (Rectangular Rocker). * **1:** Refers to the circuit type (SPST). * **R:** Refers to the color of the actuator/light (Red).