The **WSBS-2CD-R/** is a specific component code associated with the **WSBS series** of current sense resistors manufactured by **Vishay Dale**. These are high-performance Power Metal Strip® resistors designed specifically for battery management systems and high-current applications. --- ## 1. Component Overview The WSBS series is characterized by its **Shunt** design, which is used to measure current by monitoring the voltage drop across the resistor. ### Key Specifications | Feature | Typical Value/Description | | :--- | :--- | | **Material** | Solid metal manganese-copper alloy resistive element | | **Resistance Range** | Very low (typically $50 \mu\Omega$ to $1000 \mu\Omega$) | | **Power Rating** | High (up to 36W depending on specific size) | | **Tolerance** | Usually $\pm 1\%$ or $\pm 5\%$ | | **Mounting Type** | Terminal bolt-on or PCB mounting | --- ## 2. Technical Features The "2CD" suffix often refers to the physical configuration or specific terminal spacing of the shunt. * **Low Inductance:** The solid metal construction ensures an extremely low inductance ($< 5$ nH), which is critical for accurate readings in high-frequency switching environments. * **Low Thermal EMF:** Minimizes errors caused by temperature gradients across the junction of different metals ($< 3 \mu\text{V}/^\circ\text{C}$). * **All-Welded Construction:** Ensures long-term stability and durability under harsh automotive or industrial conditions. * **Temperature Coefficient (TCR):** Features a very low TCR, ensuring that resistance remains stable even as the component heats up during high-current flow. --- ## 3. Typical Applications These components are primarily found in systems where precision current monitoring is required for safety or efficiency: 1. **Battery Management Systems (BMS):** Monitoring the state of charge (SoC) and state of health (SoH) in EV or hybrid batteries. 2. **Solar Inverters:** Tracking power output and grid synchronization. 3. **Industrial Controllers:** Overcurrent protection and motor control. 4. **Power Tools:** Management of high-discharge Lithium-ion packs. --- ## 4. Part Number Breakdown (Example) While specific codes can vary by manufacturer catalog updates, the structure generally follows: `WSBS` (Series) + `Size/Configuration` + `Resistance Value` + `Tolerance` ```text Example: WSBS8518L1000JK - WSBS: Shunt Series - 8518: Physical size (8.5mm x 1.8mm area) - L1000: 100.0 micro-Ohms - J/K: Tolerance (5% or 10%) ``` ---