The part number **KNP-R3AV100RBTB** identifies a specific type of electronic resistor. Based on standard industry naming conventions (typically associated with manufacturers like **KOA Speer** or similar high-power resistor specialists), here is the detailed breakdown of its specifications. --- ### 1. Component Overview The **KNP Series** refers to **Wirewound Resistors**. These are passive components made by winding a metal wire (usually Nichrome) around a ceramic, plastic, or fiberglass core. They are known for their ability to handle high power and surge currents. ### 2. Part Number Deciphering | Segment | Meaning | Specification | | :--- | :--- | :--- | | **KNP** | Series Type | Wirewound Resistor (Coated Type) | | **R3A** | Power Rating | 0.3 Watts (300mW) or specific size code* | | **100R** | Resistance Value | 100 Ohms ($\Omega$) | | **B** | Tolerance | $\pm 0.1\%$ (Ultra-Precision) | | **TB** | Packaging | Taping Box (Ammo Pack) | *\*Note: In some manufacturer schemes, "3A" may refer to a specific physical size or flameproof coating designation.* --- ### 3. Technical Characteristics #### Electrical Properties * **High Precision:** The "B" suffix indicates a 0.1% tolerance, which is exceptionally high for a wirewound resistor. These are often used in measurement circuits. * **Temperature Coefficient (TCR):** Wirewound resistors generally offer excellent stability with temperature, typically ranging from $\pm 20$ to $\pm 100$ ppm/°C. * **Inductance:** Because they are wire-wound, they have inherent inductance. They are not ideal for high-frequency applications unless specified as "Non-Inductive" (often marked as NKNP). #### Physical Construction * **Core:** High-grade ceramic rod. * **Coating:** Typically coated with a flameproof silicone or epoxy resin to protect against environmental moisture and prevent combustion during overloads. * **Terminals:** Solder-plated copper leads (Radial or Axial, though KNP is predominantly Axial). --- ### 4. Common Applications Due to the precision and wirewound nature of this part, it is typically found in: 1. **Current Sensing:** Low-resistance versions are used to monitor current flow. 2. **Precision Instrumentation:** Used in scales, meters, and medical equipment where 0.1% accuracy is vital. 3. **Voltage Dividers:** Where high stability and low drift are required over time. 4. **Audio Equipment:** Used in high-end audio crossovers and amplifiers for heat dissipation without noise.