The **KVS-FWA-R** is an electronic component primarily classified as a **Precision Shunt Resistor** or a **Current Sense Resistor**. It is engineered by manufacturers like KOA Speer for high-power applications requiring extreme accuracy and stability in current measurement. --- ### 1. Key Technical Specifications The following table highlights the core electronic characteristics of the KVS-FWA-R series: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Shunt Resistor (Four-Terminal) | | **Resistance Range** | 0.5mΩ to 10mΩ | | **Tolerance** | ±0.1% to ±1.0% | | **Power Rating** | Up to 5 Watts | | **TCR (Temp. Coefficient)** | ±10 ppm/°C to ±50 ppm/°C | | **Operating Temp.** | -55°C to +155°C | --- ### 2. Physical and Design Characteristics #### Kelvin (4-Terminal) Connection The "R" in the suffix often denotes the specific configuration for Kelvin sensing. Unlike standard 2-terminal resistors, this part features: * **2 Power Terminals:** To carry the main load current. * **2 Sensing Terminals:** To measure the voltage drop across the resistive element. * **Benefit:** This eliminates the effect of lead resistance and contact resistance, ensuring the voltage measured is strictly from the resistor body. #### Construction Materials * **Resistive Element:** Typically made of Manganin or Ni-Cr alloys, which offer low thermal EMF and high stability. * **Encapsulation:** Molded or ceramic casing to protect against environmental factors and provide mechanical strength. --- ### 3. Application Use Cases Due to its high precision and power handling, the KVS-FWA-R is commonly found in: 1. **Battery Management Systems (BMS):** Monitoring charge/discharge cycles in electric vehicles or energy storage. 2. **Industrial Power Supplies:** High-efficiency DC-DC converters and inverters. 3. **Motor Control:** Precise current feedback for servo motors and industrial automation. 4. **Smart Meters:** Accurate energy consumption tracking. --- ### 4. Part Number Breakdown (Generic) While codes can vary slightly, here is the standard logic for this series: * **KVS:** Series Name (Kelvin Shunt). * **FWA:** Size and Material code (referencing specific dimensions). * **R:** Denotes the resistance value format or lead configuration.