The **KTG-22-R** is a specific model of a **Tactile Push Button Switch**, commonly used in consumer electronics, automotive controls, and industrial interfaces. It belongs to a category of momentary switches that provide physical feedback (a "click") when pressed. --- ### 1. Technical Specifications The electrical and physical characteristics of the KTG-22-R are critical for circuit design. | Parameter | Specification | |:---|:---| | **Switch Type** | Tactile (Momentary) | | **Mounting Type** | Through-Hole (THT) or Surface Mount (SMD) versions available | | **Circuit Arrangement** | SPST (Single Pole, Single Throw) | | **Current Rating** | Typically 50mA | | **Voltage Rating** | 12V DC | | **Contact Resistance** | < 100mΩ | | **Insulation Resistance** | > 100MΩ at 100V DC | | **Operating Force** | Usually 160gf to 250gf (grams-force) | | **Travel** | 0.25mm ± 0.1mm | --- ### 2. Internal Electronic Structure The KTG-22-R operates using a simple mechanical bridge mechanism. * **The Dome (Contact Plate):** A small metal disc (often stainless steel) sits above two open terminals. * **The Actuator:** The "button" part that the user presses. * **Switching Action:** * When pressed, the dome deforms and bridges the gap between the internal contacts, completing the circuit. * When released, the dome's elasticity snaps it back to its original shape, breaking the circuit. --- ### 3. Pin Configuration (Typical) Most tactile switches in this series feature a 4-pin layout for physical stability, though electrically they function as 2-pin switches. ```text Pin 1 [---] Pin 2 (Connected internally) | [SW] | Pin 3 [---] Pin 4 (Connected internally) ``` --- ### 4. Common Applications Due to its small footprint and reliable feedback, the KTG-22-R is found in: 1. **Computer Peripherals:** Reset buttons or function keys. 2. **Home Appliances:** Microwave control panels, washing machine interfaces. 3. **Automotive:** Dashboard buttons, key fobs. 4. **Audio Gear:** Volume steps and mode selectors. ---