The **WSBS-3DC-R** is an electronic component known as a **Power Shunt Resistor** or **Battery Sensor Resistor**, specifically designed for high-current sensing applications. It is part of the Vishay Dale WSBS series, which utilizes a solid metal manganese-copper alloy resistive element. --- ### ## Technical Specifications The following table outlines the primary electrical and physical characteristics of the WSBS-3DC-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Shunt Resistor (Power) | | **Resistance Value** | Typical: 100 µΩ (0.0001 Ω) | | **Tolerance** | ± 5.0% (Standard) | | **Power Rating** | Up to 36 W (Specific to mounting conditions) | | **Material** | Manganese-Copper Alloy (Proprietary) | | **Inductance** | < 5 nH (Ultra-low) | | **Operating Temp Range** | -65 °C to +170 °C | --- ### ### Key Electronic Characteristics 1. **Current Sensing Accuracy:** Because the resistance value is extremely low (measured in micro-ohms), it minimizes voltage drop across the component while allowing for the measurement of very high currents (often hundreds of Amps) by measuring the voltage across the shunt ($V = I \times R$). 2. **Low Thermal EMF:** The Manganese-Copper alloy construction ensures a very low Thermal EMF ($< 1 \mu V/^\circ C$). This prevents temperature gradients from creating false voltage readings, which is critical for precision battery management. 3. **AEC-Q200 Compliance:** These parts are typically qualified for automotive standards, meaning they are built to withstand high vibration, thermal shock, and harsh environments found in engine compartments or battery packs. 4. **All-Welded Construction:** The component features a robust welded design that ensures long-term stability and reliability under high-current surges. --- ### ### Typical Applications * **Battery Management Systems (BMS):** Monitoring the state of charge (SoC) and state of health (SoH) in electric vehicles (EVs). * **Power Inverters:** Measuring current flow in DC-to-AC conversion. * **Heavy Industrial Equipment:** Monitoring power consumption in high-draw machinery. * **Smart Meters:** Accurate current measurement for grid monitoring.