The **KWADS-3BA-R** is an electronic component primarily classified as a **Detector Switch**. These switches are designed to detect mechanical movement or the presence of an object within a device, converting that physical motion into an electrical signal. --- ### 1. Technical Specifications The following table highlights the core electrical and mechanical characteristics of the KWADS-3BA-R: | Feature | Specification | | :--- | :--- | | **Type** | Detector Switch (Micro-motion) | | **Operation Type** | Push-button / Lever Actuated | | **Circuit Configuration** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Rating** | 1mA 5V DC to 100mA 12V DC (Typical) | | **Contact Resistance** | < 100mΩ | | **Operating Force** | ~35gf to 50gf (Very low force) | | **Mounting Style** | Surface Mount Device (SMD/SMT) | | **Orientation** | Right Angle (Side Actuated) | --- ### 2. Key Internal Components The switch is composed of several high-precision electronic parts: * **Actuator:** The physical "button" or lever that receives the external force. In the "R" variant, this is usually designed for horizontal/side interaction. * **Contact Terminals:** Made of copper alloy with **Silver or Gold plating** to ensure high conductivity and prevent oxidation over time. * **Spring Mechanism:** A miniature internal leaf spring that provides the tactile reset force and ensures the circuit breaks when the pressure is removed. * **Housing:** A heat-resistant thermoplastic (LCP - Liquid Crystal Polymer) that allows the part to withstand reflow soldering temperatures. --- ### 3. Common Applications Because of its small footprint and sensitivity, the KWADS-3BA-R is used in: 1. **Consumer Electronics:** Detecting if a door is closed or if a tray (like a SIM tray or CD tray) is inserted. 2. **Smart Home Devices:** Tamper detection in security sensors. 3. **Industrial:** Limit switching in small-scale robotics or automated machinery. 4. **Peripheral Devices:** Detecting the "Lock" position on SD cards or the orientation of a flip-screen. --- ### 4. PCB Footprint & Design As an **SMD Right-Angle** part, the terminals are positioned to be soldered flat on the PCB, while the actuator faces the edge of the board. This is ideal for slim devices where space is at a premium. ---