The **B3-6-R** is a specific part number typically associated with the **B3 series** of subminiature tact switches manufactured by **Omron** or similar electronic component providers. It is widely used in consumer electronics, automotive controls, and industrial equipment due to its reliability and small footprint. --- ### 1. General Specifications The B3-6-R is a tactile switch designed for PCB mounting. Below are the standard technical specifications: | Feature | Specification | | :--- | :--- | | **Switch Type** | Tactile (Momentary) | | **Mounting Type** | Through-Hole (THT) | | **Actuator Style** | Plunger / Square | | **Contact Form** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Operating Force** | Typically 0.98 N to 1.47 N | | **Operating Life** | 100,000 to 1,000,000 cycles | | **Contact Rating** | 50 mA @ 24 VDC | --- ### 2. Key Components and Construction The switch consists of several internal electronic and mechanical parts that allow it to function: 1. **Actuator (Plunger):** The top part that the user presses. In the "R" variant, this is often a specific height or material (like rubber or plastic). 2. **Contact Dome:** A precision-engineered metal dome that snaps down when pressed, providing the "tactile" click and completing the electrical circuit. 3. **Terminals:** Usually silver-plated or gold-plated brass pins that are soldered into the PCB. 4. **Base (Housing):** Made of heat-resistant molded resin to withstand soldering temperatures. --- ### 3. Applications Because of its small size and durability, the B3-6-R is commonly found in: * **Consumer Goods:** Microwave buttons, remote controls, and washing machine panels. * **Computing:** Reset buttons on motherboards or peripherals. * **Industrial:** Interface panels for PLC (Programmable Logic Controllers). --- ### 4. Schematic Representation The electrical circuit for this part is very simple. It remains open until the actuator is depressed. ```text (1) Pin ----/ ---- (2) Pin (Switch) ``` ---