The **KNP-R3AV100RGTB** is a specific part number for a **Wirewound Resistor**, typically manufactured by companies like Yageo or similar high-power component specialists. This component is designed for power management and circuit protection. --- ### 1. Technical Specifications Below is a breakdown of the technical characteristics based on the standard nomenclature for this series: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Fixed Resistor | Wirewound technology | | **Resistance Value** | 100 $\Omega$ (Ohms) | Indicated by "100R" | | **Power Rating** | 0.3W - 3W | Depends on specific package size (R3 usually denotes 0.3W or 3W depending on manufacturer series) | | **Tolerance** | ±2% or ±5% | "G" often denotes 2%, "J" denotes 5% | | **Mounting Type** | Through-Hole | Axial leaded package | | **Coating** | Flameproof | Silicone or lacquer coating for safety | --- ### 2. Physical Construction The resistor is built using the following layers: 1. **Core:** A ceramic rod (usually Alumina) acts as the heat-resistant base. 2. **Element:** A resistive wire (Nickel-Chromium or similar alloy) is wound around the core. 3. **Termination:** Metal caps are fitted to the ends, connected to solderable leads. 4. **Coating:** A flame-retardant layer protects the wire from moisture and prevents fire during extreme overloads. --- ### 3. Key Features and Applications #### Key Features * **High Surge Capability:** Wirewound resistors can handle significantly higher momentary surges compared to film resistors. * **Heat Dissipation:** Designed to operate at high temperatures without degradation. * **Flameproof:** If the resistor fails due to excessive current, it will open cleanly without catching fire. #### Common Applications * **Inrush Current Limiting:** Used in power supplies to limit initial current spikes. * **Snubber Circuits:** Used in motor controllers to dissipate energy. * **Voltage Division:** In high-power circuits where precision and stability are required. * **Pre-charge Circuits:** Commonly found in EV battery management or industrial UPS systems. --- ### 4. Part Number Decoding (Typical) While naming conventions vary slightly by manufacturer, the code usually breaks down as follows: | Segment | Meaning | | :--- | :--- | | **KNP** | Series Name (Wirewound Fixed Resistor) | | **R3** | Power Rating / Body Size code | | **AV** | Lead Forming / Packaging style (e.g., Axial Vertical) | | **100R** | Resistance Value (100 Ohms) | | **G** | Tolerance (±2%) | | **TB** | Taping in Box (Packaging method) | ---