The **WSBS-15DA-R** is a high-precision, low-resistance shunt resistor specifically designed for automotive and industrial battery management systems (BMS). It is part of the Vishay Dale Power Metal Strip® series. --- ## Technical Specifications The following table outlines the primary electronic characteristics of the WSBS-15DA-R: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 100 µΩ (0.0001 Ω) | | **Power Rating** | 36 W (Continuous) | | **Tolerance** | ± 5.0 % (Standard) | | **Temperature Coefficient (TCR)** | < ± 200 ppm/°C | | **Thermal EMF** | < 1 µV/°C | | **Operating Temp Range** | -65 °C to +170 °C | | **Construction** | Solid metal Manganese-Copper alloy | --- ## Key Components and Design Features ### 1. Resistive Element The core of the component is a solid **manganese-copper alloy** resistive element. This material is chosen for its extremely low resistance and high stability over a wide range of temperatures, which is critical for accurate current sensing. ### 2. Physical Construction * **Bolt-On Design:** Unlike standard surface-mount (SMD) resistors, the WSBS-15DA-R features a "Power Metal Strip" design with two holes for bolt-on mounting. This ensures a secure, high-current connection directly to battery terminals or busbars. * **All-Welded Construction:** The transition between the resistive alloy and the terminals is welded, reducing the risk of resistance drift caused by mechanical stress or heat cycles. ### 3. Electronic Behavior * **Low Inductance:** The strip design results in very low self-inductance (< 5 nH), which is vital for high-frequency measurement and switching environments. * **Thermal Management:** The large mass of the metal strip helps dissipate heat efficiently, allowing it to handle high pulse currents without permanent damage. --- ## Common Applications Because of its ability to handle very high currents (hundreds of Amperes), it is used in: * **Battery Management Systems (BMS):** Measuring state-of-charge (SoC) and state-of-health (SoH). * **Electric Vehicles (EV):** Monitoring high-voltage battery packs. * **Solar Inverters:** Managing high-current DC inputs.