The **PWH10WW-R100** is a high-power wirewound resistor, typically manufactured by companies like **Synton-Tech**. These components are designed to dissipate significant heat while providing stable resistance in power-heavy circuits. --- ### 1. Technical Specifications Based on the standard nomenclature for this series, here are the key electronic characteristics: | Parameter | Value / Detail | | :--- | :--- | | **Series Type** | PWH (Power Wirewound, Horizontal Mounting) | | **Power Rating** | 10 Watts | | **Resistance Value** | 0.1 $\Omega$ (indicated by R100) | | **Tolerance** | Typically ±5% (Standard for "J" grade) | | **Construction** | Ceramic core with wire winding and cement filling | | **Mounting Style** | Through-hole, Radial/Horizontal (with standoff leads) | --- ### 2. Physical Construction The "PWH" series is often referred to as a **Cement Resistor**. It consists of several layers: * **Core:** A high-grade ceramic or fiberglass rod. * **Winding:** A resistive alloy wire (like Nichrome) wound around the core. * **Encapsulation:** The entire assembly is placed inside a rectangular ceramic boat and sealed with **inorganic flameproof cement**. * **Leads:** Tin-plated copper leads designed to handle high current. --- ### 3. Key Electronic Features * **High Heat Dissipation:** The ceramic body is an excellent thermal conductor, allowing the component to operate at high temperatures without igniting. * **Non-Flammable:** Due to the cement housing, these resistors will not catch fire even if overloaded to the point of failure. * **Low Resistance (0.1 Ohm):** This specific value is frequently used for **Current Sensing**. By measuring the small voltage drop across this resistor, a circuit can determine how much current is flowing. * **Inductance:** Since it is "wirewound," it has a small amount of parasitic inductance. It is generally not suitable for very high-frequency RF applications. --- ### 4. Common Applications 1. **Current Shunts:** Used in power supplies to monitor output current. 2. **Motor Controllers:** To limit inrush current or serve as a brake resistor. 3. **Audio Crossovers:** Often found in speaker systems to manage high-power signals to drivers. 4. **Power Supplies:** Used as a bleeder resistor or for voltage dropping. ---