The **WSBS-41D-R** is a high-precision, low-resistance shunt resistor designed primarily for high-current sensing applications. Manufactured by **Vishay Dale**, it belongs to the Power Metal Strip® series. --- ### ## Technical Specifications The following table outlines the core electronic characteristics of the WSBS-41D-R: | Parameter | Value | | :--- | :--- | | **Resistance Value** | Typical range around 50 $\mu\Omega$ to 1000 $\mu\Omega$ (varies by sub-model) | | **Power Rating** | Up to 36 Watts (depending on mounting) | | **Tolerance** | $\pm$ 1.0% or $\pm$ 5.0% | | **Material** | Manganese-copper alloy resistive element | | **Construction** | Electron-beam welded terminal-to-element | | **Temperature Coefficient** | Low TCR (< 20 ppm/°C for the alloy) | | **Inductance** | Extremely low (< 5 nH) | --- ### ## Key Electronic Features 1. **Low Resistance Value:** Because it operates in the micro-ohm ($\mu\Omega$) range, it minimizes power dissipation ($P = I^2R$) even when measuring currents exceeding 100 Amps. 2. **Kelvin (4-Terminal) Connection:** The design typically facilitates a 4-terminal setup. Two terminals carry the high current, while two smaller "sense" terminals measure the voltage drop. This eliminates errors caused by the resistance of the leads and solder joints. 3. **Thermal Stability:** The use of a solid metal manganese-copper alloy ensures that the resistance remains stable even as the component heats up under heavy load. 4. **All-Welded Construction:** The resistive element is electron-beam welded to copper terminals. This provides superior robust performance compared to thick-film or wound resistors, making it resistant to thermal shock and vibration. --- ### ## Common Applications The WSBS-41D-R is specifically engineered for automotive and industrial environments: * **Battery Management Systems (BMS):** Monitoring the charge and discharge cycles of EV batteries. * **Electronic Power Steering:** Sensing high-current motor feedback. * **Busbar Current Sensing:** Directly mounting to copper busbars in power distribution units. * **Inverters:** High-frequency current monitoring for DC-to-AC conversion. ---