The **SWC85I-R10KA** is a high-precision, industrial-grade **Wirewound Potentiometer** (often referred to as a rotary variable resistor). It is designed for applications requiring high durability, reliability, and precise linear adjustment. --- ### 1. Key Technical Specifications | Parameter | Specification | Details | | :--- | :--- | :--- | | **Resistance Value** | 10k $\Omega$ | The total resistance across the outer terminals. | | **Tolerance** | $\pm$ 5% to 10% | Precision range for the nominal resistance. | | **Power Rating** | 1.0W - 2.0W | Capacity to dissipate heat at specific temperatures. | | **Technology** | Wirewound | Resistance is created by wire wrapped around a core. | | **Rotation Angle** | 300° $\pm$ 5° | The physical range of motion for the shaft. | | **Mounting Type** | Panel Mount | Designed to be secured through a hole in a chassis. | --- ### 2. Physical Construction The "SWC" series typically features a robust mechanical design: * **Housing:** Usually constructed from high-grade plastic or metal to withstand industrial environments. * **Terminals:** Solder lugs or pins designed for secure electrical connection. * **Shaft:** Stainless steel or brass shaft, often featuring a "D-shape" or "Slotted" head for knob attachment. * **Wiper:** A precious metal or specialized alloy contact that moves across the wire windings to vary the resistance. --- ### 3. Functional Identification (Part Number Breakdown) While naming conventions vary slightly by manufacturer (such as *Sakae* or *Precision Electronics*), the code generally breaks down as follows: 1. **SWC:** Series identifier (Single-turn, Wirewound, Compact). 2. **85I:** Physical size/frame code (e.g., 22mm or 30mm diameter). 3. **R:** Linear Taper (Resistance changes linearly with rotation). 4. **10KA:** 10,000 Ohms total resistance. --- ### 4. Applications Due to the **Wirewound** nature, this part is preferred over carbon potentiometers for: * **Motor Speed Control:** Handling higher current and providing stable feedback. * **Industrial Joysticks:** Providing positional data for heavy machinery. * **Calibration Equipment:** Used where high stability and low temperature-coefficient are required. * **Power Supplies:** Adjusting voltage or current limits with high precision. --- ### 5. Advantages vs. Disadvantages * **Pros:** High power handling, excellent thermal stability, and long mechanical life. * **Cons:** Higher electrical noise (resolution is limited by the physical turns of the wire) compared to conductive plastic types.