The **B3W-9000-R2R** is a high-quality, illuminated tactile switch manufactured by **Omron Electronic Components**. It belongs to the B3W-9 series, which is specifically designed for compact applications requiring integrated LED signaling and a responsive tactile feel. --- ### 1. Key Technical Specifications The "R2R" suffix indicates specific color and brightness configurations (Red LED with a Red cap). | Parameter | Specification | | :--- | :--- | | **Switch Type** | Tactile Switch (Momentary) | | **LED Color** | Red (Single LED) | | **Button/Cap Color** | Red | | **Operating Force** | 1.57 N {160 gf} | | **Contact Form** | SPST-NO (Single Pole, Single Throw - Normally Open) | | **Switching Capacity** | 1 to 50 mA, 5 to 24 VDC | | **Mechanical Life** | 300,000 operations minimum | | **Dimensions** | 10mm x 10mm x 11mm | --- ### 2. Physical Design & Features * **Integrated LED:** Unlike standard tactile switches where the LED is a separate component on the PCB, the B3W-9000 series integrates the LED directly into the switch body, ensuring uniform illumination of the cap. * **Dual-Action Snap:** The internal mechanism uses a metal dome that provides a crisp, audible "click" and tactile feedback to the user upon actuation. * **Through-Hole Mounting:** Designed for PCB mounting with secure soldering pins. * **Dust Resistance:** The structure offers high reliability even in environments with moderate dust exposure. --- ### 3. Pin Configuration (Internal Circuit) The switch typically features 4 main pins for the switch mechanism and 2 additional pins for the LED. ```text [ Top View Diagram ] (1) --- [Switch] --- (2) (3) --- [Switch] --- (4) (+) --- [ LED ] --- (-) ``` * **Pins 1-4:** Connected in pairs; pressing the button completes the circuit between all four pins. * **LED Pins:** Polarized; requires a current-limiting resistor (typically 220Ω to 1kΩ depending on your VCC) to prevent burning out the LED. --- ### 4. Common Applications Due to its compact size and integrated lighting, it is frequently used in: 1. **Industrial Controls:** Status indicators on control panels. 2. **Medical Equipment:** Interface buttons that require visual confirmation. 3. **Consumer Electronics:** Power buttons or mode selection switches. 4. **Test & Measurement:** Portable instruments.