The **KFS-K1-R/Q** is a specific series of tactile micro-switches, typically manufactured by companies like **Kailh (Kaihua Electronics)** or similar electronic component vendors. These are widely used in consumer electronics, automotive controls, and industrial interfaces. --- ### 1. General Specifications These components are surface-mount (SMD) or through-hole tactile switches designed for high reliability and a specific "click" feel. | Feature | Description | | :--- | :--- | | **Component Type** | Tactile Push Button Switch | | **Circuit Type** | SPST (Single Pole Single Throw) | | **Switch Function** | Momentary (Normally Open) | | **Mounting Type** | R = Right Angle / Q = Vertical (Standard) | | **Operating Force** | Usually 160gf to 250gf (grams-force) | | **Contact Material** | Silver plated or Gold plated options | --- ### 2. Key Electronic Parts & Construction The KFS-K1 series consists of four primary internal components that dictate its performance: 1. **The Actuator (Stem):** The physical part you press. In the "R" version, this is often side-actuated. 2. **The Metal Dome:** The "heart" of the switch. It acts as both the spring and the movable contact. When pressed, it collapses to complete the circuit and provides the tactile "click." 3. **Contacts:** Two stationary terminals inside the housing. When the dome collapses, it bridges the gap between these terminals. 4. **Housing/Base:** Usually made of High-Temperature Thermoplastic (LCP) to withstand reflow soldering temperatures. --- ### 3. Part Number Suffix Breakdown The "R" and "Q" designations usually refer to the physical orientation and terminal style: * **R (Right Angle):** The button is pressed parallel to the PCB. These are common on the edges of devices (e.g., volume buttons on a tablet). * **Q (Vertical/Standard):** The button is pressed perpendicular to the PCB. These are common on top-facing panels. --- ### 4. Technical Characteristics ```json { "electrical_rating": "50mA 12V DC", "insulation_resistance": "100MΩ min. 100V DC", "dielectric_strength": "250V AC for 1 min", "contact_resistance": "100mΩ max", "travel": "0.25mm ± 0.1mm", "operating_life": "100,000 to 1,000,000 cycles" } ``` --- ### 5. Common Applications * **Consumer Electronics:** Remote controls, cameras, and handheld gaming devices. * **Automotive:** Dashboard buttons, steering wheel controls. * **Peripherals:** Computer mice (side buttons) and keyboard function keys.