The **FLCS-71-R/K** is a specific electronic component within the category of **Pushbutton Switches**, commonly manufactured by Japanese electronic component specialists like **Sunmulon**. These switches are known for their precision, reliability, and integrated illumination options. --- ## 1. Component Identification The model number identifies specific characteristics of the switch mechanism and its visual feedback system. | Part Segment | Meaning | | :--- | :--- | | **FLCS** | Series name (Low-profile/Small illuminated pushbutton) | | **71** | Size/Body configuration code | | **R** | Color code (typically **Red**) | | **K** | Contact type or button style (often indicates **Momentary** action) | --- ## 2. Key Technical Specifications While exact specifications can vary by production year, the FLCS series generally follows these electronic parameters: ### Electrical Characteristics * **Switching Capacity:** Usually rated for low current (e.g., 0.1A at 30V DC or 125V AC). * **Contact Resistance:** Typically less than 50mΩ. * **Insulation Resistance:** 100MΩ minimum at 500V DC. * **Dielectric Strength:** 1,000V AC for 1 minute between terminals. ### Mechanical Features * **Action:** **Momentary** (the switch returns to its original position after being released). * **Mounting:** Designed for **PCB (Printed Circuit Board)** mounting or panel mount depending on the terminal layout. * **Stroke:** Short travel distance (approx. 1.0mm to 2.5mm) for tactile feedback. --- ## 3. The Illumination System (R/K) The "R" signifies that the unit contains a **Red LED** or a red filter lens. * **LED Voltage:** Usually requires a forward voltage ($V_f$) of approximately 1.8V to 2.2V. * **Independent Circuit:** The LED is electrically isolated from the switch contacts, allowing the light to be controlled by an external logic circuit (e.g., to indicate a "Status On" mode). * **Current Limiting:** A resistor must be used in series with the LED to prevent burnout if connecting to a 5V or 12V supply. --- ## 4. Typical Applications These parts are industrial-grade and are frequently found in: 1. **Broadcast Equipment:** Control panels for video switchers. 2. **Medical Devices:** Interface buttons for diagnostic machinery. 3. **Industrial Automation:** Start/Stop buttons on PLC interfaces. 4. **Test & Measurement:** High-precision laboratory instruments. ---