It appears you are referring to the **5WV-R**, which is a specific model designation often associated with **high-power wirewound resistors** or certain series of automotive sensors (depending on the manufacturer context). The most common identification for "5WV-R" is a **Ceramic Encased Wirewound Resistor** (Cement Resistor). --- ### 1. Component Overview The 5WV-R is typically a vertical-mount cement resistor. The "5W" indicates the power rating, while "V" usually denotes a vertical orientation. | Feature | Description | | :--- | :--- | | **Power Rating** | 5 Watts | | **Housing** | Ceramic (Cement) casing for heat resistance | | **Internal Material** | Wirewound resistive element around a fiberglass or ceramic core | | **Mounting Style** | Vertical (Radial leads) | | **Function** | Current limiting, voltage dropping, or power dissipation | --- ### 2. Physical Construction 1. **The Core:** A non-conductive rod (fiberglass or ceramic) where the resistive wire is wound. 2. **The Wire:** Usually a Nickel-Chromium (NiCr) alloy. The length and thickness determine the resistance ($\Omega$). 3. **The Enclosure:** A rectangular ceramic boat filled with a special fireproof cement or inorganic flameproof material. 4. **Leads:** Tin-plated copper wires designed for PCB mounting. --- ### 3. Technical Specifications While the specific resistance value (e.g., 10Ω, 100Ω) follows the part number, the general specs for this series are: * **Tolerance:** Typically $\pm 5\%$ (J) or $\pm 10\%$ (K). * **Temperature Coefficient:** $\pm 300 ppm/^\circ C$. * **Operating Temp:** $-55^\circ C$ to $+155^\circ C$ (varies by brand). * **Insulation Resistance:** $>1000 M\Omega$. --- ### 4. Common Applications Due to their ability to handle heat and power surges, these parts are used in: * **Power Supplies:** Used as "bleeder" resistors to discharge capacitors. * **Audio Equipment:** Used in crossover networks for speakers. * **Motor Controllers:** To limit inrush current. * **Automotive Electronics:** Load resistors for LED turn signals to prevent "hyper-flashing." --- ### 5. Identification Code Example If the full part number is **5WV 10R J**: * **5W:** 5 Watts power handling. * **V:** Vertical mount style. * **10R:** 10 Ohms resistance. * **J:** 5% Tolerance.