The **WSBS-152B-R/E** is a high-precision, automotive-grade Power Shunt Resistor manufactured by **Vishay Dale**. It is specifically designed for battery management and high-current sensing applications. ### 1. Technical Specifications The following table outlines the key electrical and physical characteristics of the WSBS-152B-R/E: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 100 $\mu\Omega$ (0.0001 $\Omega$) | | **Power Rating** | 36 W | | **Tolerance** | ± 5% (Standard) | | **Temperature Coefficient (TCR)** | ± 200 ppm/°C | | **Operating Temperature Range** | -65 °C to +170 °C | | **Inductance** | < 5 nH | | **Construction** | Solid metal manganese-copper alloy | --- ### 2. Key Design Features * **AEC-Q200 Qualified:** This part is tested and certified for automotive environments, meaning it can withstand high vibrations and extreme thermal cycling. * **Electron Beam Welded:** The resistor utilizes a specialized welding process to join the resistive element to the copper terminals, ensuring low thermal EMF and high stability. * **Low Inductance:** Its structural design minimizes parasitic inductance, which is critical for accurate current measurement in high-speed switching circuits. * **Current Handling:** Due to the extremely low resistance (100 micro-ohms), it can handle several hundred amperes with minimal heat dissipation compared to standard resistors. --- ### 3. Application Areas The WSBS-152B-R/E is primarily used as a **Current Sense Resistor**. By measuring the voltage drop across the shunt ($V = I \times R$), the system controller can calculate the current flowing through the circuit. 1. **Battery Management Systems (BMS):** Monitoring the state of charge (SoC) and health (SoH) in Electric Vehicle (EV) batteries. 2. **Solar Inverters:** Monitoring high-current DC output. 3. **Industrial Controls:** Measuring current in heavy-duty motor drives and power supplies. 4. **Welding Equipment:** Precision monitoring of output current. --- ### 4. Part Number Breakdown (Nomenclature) * **WSBS:** Power Shunt Battery Sensor series. * **152B:** Physical size/package code. * **R/E:** Lead (Pb)-free and RoHS compliant termination.