The **2TS-2B-R2** is a specific model of a **Tactile Push Button Switch**. These components are widely used in consumer electronics, industrial controls, and PCB prototyping due to their small footprint and reliable "clicky" feedback. ### 1. Key Technical Specifications The following table outlines the general electrical and mechanical characteristics of the 2TS-2B-R2 series: | Feature | Specification | | :--- | :--- | | **Switch Type** | Momentary Tactile (Normally Open) | | **Mounting Type** | Through-Hole (THT) | | **Circuit Configuration** | SPST (Single Pole Single Throw) | | **Current Rating** | ~50mA | | **Voltage Rating** | 12V DC | | **Contact Resistance** | < 100 mΩ | | **Operating Force** | 160gf to 250gf (typical) | | **Actuator Height** | Specific to the "R2" variant (often 4.3mm or 5mm) | --- ### 2. Internal Construction and Operation The switch consists of four primary internal layers: 1. **Actuator (Button):** The plastic part the user presses. 2. **Cover:** A metal plate that holds the internal components in place. 3. **Contact Dome:** A flexible metal disc. When pressed, it collapses (providing the "click") and connects the two internal terminals. 4. **Base:** The plastic housing containing the fixed metal contacts. --- ### 3. Pin Configuration and Wiring The 2TS-2B-R2 usually features **4 pins**. However, it is an SPST switch, meaning: * Pins are connected in pairs internally. * Pins 1 and 2 are usually tied together. * Pins 3 and 4 are usually tied together. * Pressing the button completes the circuit between the (1,2) pair and the (3,4) pair. ```cpp // Example: Arduino code to read the switch state int buttonPin = 2; void setup() { pinMode(buttonPin, INPUT_PULLUP); // Use internal resistor Serial.begin(9600); } void loop() { int state = digitalRead(buttonPin); if (state == LOW) { Serial.println("Button Pressed!"); } } ``` --- ### 4. Common Applications * **User Interface:** Power buttons on household appliances. * **Reset Buttons:** Common on microcontrollers like the Arduino or ESP32. * **Keypads:** Matrix arrays for input devices. * **Industrial:** Settings adjustment buttons on control panels.