The **SWC18FC-R15KA** is a specific type of high-precision electronic component, typically categorized as a **Wirewound Potentiometer** (variable resistor). These are commonly used in industrial control systems and precision instruments for manual adjustments or feedback sensing. --- ### 1. Technical Specifications Table | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Single-turn Wirewound Potentiometer | | **Resistance Value** | 15k Ohms (indicated by "15KA") | | **Tolerance** | ±5% to ±10% | | **Power Rating** | 1.0W to 2.0W (at 40°C) | | **Effective Electrical Angle** | ~320° - 340° | | **Mounting Type** | Panel Mount (Nut & Washer) | | **Shaft Diameter** | 6.0mm / 6.35mm | --- ### 2. Breakdown of the Part Number * **SWC:** Series designation, usually referring to a standard industrial wirewound construction. * **18:** Refers to the outer diameter of the body (approx. **18mm**). * **FC:** Generally indicates the shaft type (e.g., **F**latted shaft, **C**hrome or Metal construction). * **R15K:** The resistance value. "R" denotes Resistance, and "15K" equals **15,000 Ohms**. * **A:** Often represents the **Linear Taper** (Type A), meaning the resistance changes proportionally to the rotation. --- ### 3. Key Electronic Characteristics 1. **Wirewound Element:** Unlike carbon film potentiometers, this uses a resistive wire wrapped around a core. This provides high stability, high power handling, and a low temperature coefficient. 2. **Linearity:** These parts are designed for high linearity, meaning if you turn the knob 50%, the resistance will be exactly 50% of the total value. 3. **Durability:** Metal housing and shafts make them suitable for harsh environments where vibration or high temperatures are present. 4. **Terminal Configuration:** Usually features three solder lugs: * **Pin 1 & 3:** The ends of the resistive element. * **Pin 2 (Wiper):** The moving contact that varies the resistance. --- ### 4. Common Applications * **Motor Speed Control:** Used as a manual input for VFDs (Variable Frequency Drives). * **Audio Equipment:** Industrial-grade volume or gain controls. * **Calibration:** Used as a "set-and-forget" trimmer in high-precision power supplies. * **Heavy Machinery:** Control interfaces for cranes, forklifts, or CNC consoles. ---