The part number **KNP-R3AV1RBP** typically refers to a high-precision, wirewound resistor, often associated with the **KNP Series**. These components are designed for high-power applications where reliability and heat dissipation are critical. --- ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Component Type** | Wirewound Resistor | | **Series** | KNP (High Power/Flameproof) | | **Resistance Value** | 1.0 Ohm (1R) | | **Power Rating** | 3 Watts (indicated by "3") | | **Tolerance** | ±5% (Standard) or ±1% (Precision) | | **Coating** | Flameproof Silicone/Ceramic | | **Mounting Type** | Through-hole (Axial leads) | --- ### 2. Breakdown of the Part Code While manufacturers vary slightly (e.g., Yageo, Vitrohm, or Royalohm), the code generally follows this logic: 1. **KNP**: The series identifier. "KNP" stands for **Wirewound Resistor**, usually with a flameproof coating. 2. **3A**: Indicates the physical size and power rating (in this case, **3 Watts**). 3. **V**: Often denotes the packaging style (Vertical or specific lead forming) or a temperature coefficient rating. 4. **1R**: The resistance value. "1R" equals **1.0 $\Omega$**. 5. **BP**: Usually indicates **Bulk Pack** or specific lead-free (RoHS) compliance branding. --- ### 3. Key Electronic Characteristics * **High Power Dissipation:** Because they are wirewound (wire wrapped around a ceramic core), they can handle significantly higher power loads and surges compared to carbon film resistors. * **Flameproof Protection:** The "KNP" series is coated with a non-flammable material that will not catch fire even if the resistor is severely overloaded. * **Inductance:** Being wirewound, these parts have inherent inductive properties. They are excellent for power supplies and motor controllers but are generally not suitable for high-frequency RF applications. * **Thermal Stability:** They offer a low Temperature Coefficient of Resistance (TCR), meaning the resistance remains stable even as the component heats up. --- ### 4. Common Applications * **Power Supplies:** Used as "Inrush Current Limiters" or bleeder resistors. * **Audio Equipment:** Found in amplifier output stages and crossover networks. * **Industrial Controls:** Used in motor braking circuits and voltage dividers. * **Automotive:** Utilized in lighting control modules and heating elements.