## Electronic Component Overview: M2REB-RB3-R2/UL The **M2REB-RB3-R2/UL** is a specific part number belonging to the **M2 series** of industrial pushbuttons/selectors manufactured by **Nidec Components** (formerly Copal Electronics). This specific part is a miniature, sub-miniature, or standard illuminated pushbutton switch designed for PCB mounting or panel integration. --- ### 1. Technical Specifications The part number is structured to define the physical and electrical characteristics of the switch. | Characteristic | Specification / Detail | | :--- | :--- | | **Series** | M2 Series (Sub-miniature / Miniature Switch) | | **Circuitry** | DPDT (Double Pole Double Throw) | | **Switching Function** | ON - (ON) / Momentary (Spring Return) | | **Contact Rating** | Typically 6A @ 125VAC or 3A @ 250VAC | | **Termination Style** | Right-angle PCB terminals (RB3 designation) | | **Illumination** | Integrated LED (Red) | | **Compliance** | UL (Underwriters Laboratories) Recognized | --- ### 2. Breakdown of the Part Number To understand the "electronic parts" of this assembly, we break down the nomenclature: 1. **M2**: The base series identifier for the switch type. 2. **REB**: Indicates the actuator style and the built-in Red LED illumination. 3. **RB3**: Refers to the terminal configuration. "RB" usually denotes **Right-angle** mounting for PC boards, allowing the switch to sit horizontally on a vertical board. 4. **R2**: Refers to the specific resistance or LED voltage rating (often standard 2V or specific current limiting). 5. **UL**: Confirms the component meets North American safety standards for flame retardancy and electrical insulation. --- ### 3. Key Electronic Features * **Bifurcated Contacts:** Often used in these series to ensure high contact reliability even under low-current conditions (logic level). * **Snap-Action Mechanism:** Provides a crisp tactile feel and prevents "arcing" by ensuring rapid contact separation. * **LED Integration:** The internal LED is electrically isolated from the switch contacts, allowing the light to be controlled independently by a microcontroller or PLC. * **High Dielectric Strength:** Typically rated for 1,000V AC for one minute, ensuring safety between the circuit and the operator. --- ### 4. Typical Applications This component is frequently found in: * **Industrial Control Panels:** As a reset or start button. * **Test and Measurement Equipment:** For mode selection. * **Telecommunications:** In rack-mounted hardware where space is limited. * **Medical Devices:** Due to high reliability and UL certification.