The **SWT6-R4RTR** is a specific model of a **Tactile Switch** manufactured by **Diptronics**. These components are widely used in consumer electronics, automotive interfaces, and industrial controls to provide a physical "click" sensation and complete a circuit when pressed. --- ### 1. Technical Specifications | Parameter | Specification | |:---|:---| | **Switch Type** | Tactile (Momentary) | | **Circuit** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Mounting Type** | Surface Mount Device (SMD/SMT) | | **Dimensions** | 6.2mm x 6.2mm | | **Actuator Height** | Variable (Standard is often 4.3mm or 5.0mm) | | **Operating Force** | 160gf (Grams-force) | | **Life Cycle** | ~100,000 to 500,000 Cycles | | **Contact Rating** | 50mA @ 12VDC | --- ### 2. Breakdown of the Part Number The part number follows a specific nomenclature used by Diptronics: * **SWT**: Series designation (Standard Tactile Switch). * **6**: Size category (6mm square series). * **R**: Indicates **SMT (Surface Mount)** lead style. * **4**: Refers to the height of the actuator (button stem). * **R**: Operating force (standardly 160gf). * **TR**: Packaging type (**Tape and Reel**), designed for automated pick-and-place machines. --- ### 3. Key Features and Usage #### Mechanical Design The switch features a metal dome contact. When pressure is applied to the actuator, the dome collapses, creating an audible and tactile "click" while bridging the contacts on the PCB. #### Electrical Characteristics * **Contact Resistance:** Usually < 100mΩ. * **Insulation Resistance:** > 100MΩ at 500VDC. * **Dielectric Strength:** 250VAC for 1 minute. #### Common Applications * **Household Appliances:** Microwave panels, washing machine buttons. * **Consumer Electronics:** Remote controls, camera shutters. * **Computer Peripherals:** Keyboards, mouse buttons, reset switches. * **Industrial:** Interface panels for machinery. --- ### 4. Implementation Example (Schematic) In a typical microcontroller (MCU) circuit, the SWT6-R4RTR is used with a pull-up resistor to detect a "Low" signal when pressed. ```c // Pseudo-code for detecting a press if (digitalRead(TACT_SWITCH_PIN) == LOW) { // Switch is pressed, execute action delay(20); // Software debounce } ```