The **RW3E-R10-KT** is a specialized electronic component, specifically a **high-precision, high-power wirewound surface mount resistor** manufactured by **KOA Speer Electronics**. It is designed for current sensing and high-reliability applications where heat dissipation and stability are critical. --- ## 1. Technical Specifications Below are the primary electronic characteristics of the RW3E-R10-KT: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Resistance Value** | 0.1 $\Omega$ (R10) | Low resistance for current sensing. | | **Tolerance** | ±10% (K) | Allowable deviation from nominal value. | | **Power Rating** | 3.0 Watts | High power handling for an SMD package. | | **Technology** | Wirewound | Resistive wire wrapped around a ceramic core. | | **Temperature Coefficient** | ±100 ppm/°C | Stability across temperature fluctuations. | | **Package / Case** | 6028 (Metric) | Large SMD footprint for heat management. | | **Operating Temp** | -55°C to +150°C | Suitable for harsh environments. | --- ## 2. Key Internal Components The "electronic parts" within this single component include: * **Resistive Element:** A precision-drawn alloy wire (typically Nickel-Chromium or similar) that dictates the resistance value. * **Core:** A high-thermal-conductivity ceramic core (Alumina) which acts as the physical support and heat sink for the wire. * **Encapsulation:** A flame-retardant molded resin that protects the wire from moisture and mechanical stress. * **Terminations:** Solderable end-caps designed for Surface Mount Technology (SMT), often plated with tin (Sn) over a nickel (Ni) barrier. --- ## 3. Part Number Breakdown Understanding the nomenclature helps identify its specific electronic behavior: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **RW** | Series | Rectangular Wirewound Resistor | | **3** | Power Rating | 3.0 Watts | | **E** | Molding Type | Indicates the specific molding/casing material | | **-R10** | Resistance | R denotes the decimal point (0.10 $\Omega$) | | **-K** | Tolerance | K = ±10% | | **-T** | Packaging | T = Taping (Relates to how it is supplied for assembly) | --- ## 4. Common Applications Due to its high power rating and low resistance, this part is typically used for: 1. **Current Sensing:** Measuring current flow in power supplies or motor controllers. 2. **Inrush Limiting:** Protecting circuits from sudden surges of electricity. 3. **Voltage Division:** In high-power circuits where standard film resistors would fail.