The electronic part number **10-R1W3** refers to a specific type of **power resistor**. This alphanumeric code typically breaks down into specifications regarding its resistance value, tolerance, and power rating. --- ### 1. Technical Specification Breakdown Based on standard electronic component naming conventions (often used by manufacturers like Ohmite, KOA Speer, or Vishay), the code is interpreted as follows: | Component Feature | Code Segment | Description | | :--- | :--- | :--- | | **Resistance Value** | `10-R` | **10 Ohms**. The 'R' acts as a decimal point. | | **Tolerance** | `1` | **±1% Precision**. This indicates a high-accuracy resistor. | | **Power Rating** | `W3` | **3 Watts**. The maximum power the resistor can dissipate. | --- ### 2. Component Characteristics A **10 Ohm, 3W, 1%** resistor generally falls into the following categories: * **Type:** Usually a **Wirewound** or **Metal Oxide Film** resistor. Wirewound types are preferred for power handling, while Metal Oxide is used for high-temperature stability. * **Form Factor:** Typically axial-leaded (cylindrical with wires coming out of both ends) or ceramic encased (cement resistor). * **Thermal Performance:** Designed to operate at elevated temperatures. At 3W, the component will become physically hot during operation and requires adequate airflow or spacing on a PCB. --- ### 3. Common Applications Due to its low resistance and relatively high power rating, this part is commonly used in: 1. **Current Sensing:** Measuring current by monitoring the voltage drop across the 10-ohm resistance. 2. **Inrush Limiting:** Protecting circuits from sudden surges of electricity when powered on. 3. **Snubber Circuits:** Used in power supplies to absorb inductive energy and prevent voltage spikes. 4. **Audio Crossovers:** Managing signal levels in speaker systems where precision (1%) and power (3W) are necessary. --- ### 4. Identification Table If you are looking for a replacement, ensure the new part matches these criteria: | Parameter | Value | | :--- | :--- | | **Resistance** | 10 $\Omega$ | | **Tolerance** | ± 1% | | **Power Rating** | 3 Watts | | **Mounting Type** | Through-hole (Axial) |