The **WSBS-15CB-R/Q** refers to a high-precision, low-resistance shunt resistor manufactured by **Vishay Dale**. These components are specifically designed for high-current sensing applications, typically found in battery management systems and power distribution units. --- ### 1. Key Technical Specifications The following table outlines the core electronic characteristics of the WSBS series: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | Typical range around 50 µΩ to 1000 µΩ | | **Power Rating** | Up to 36 W (depending on air flow/heat sinking) | | **Tolerance** | ± 1% or ± 5% | | **Material** | Solid metal Manganese-Copper alloy | | **Temperature Coefficient** | Low TCR (< 20 ppm/°C for the alloy) | | **Inductance** | Very low (< 5 nH) | --- ### 2. Physical Construction and Features The "CB" designation often refers to a specific lead configuration or "C-Beam" style geometry. * **Electron-Beam Welded Construction:** The resistive element is welded to heavy copper connectors. This ensures maximum stability and minimal thermal EMF (Electromotive Force). * **Bolt-Down Design:** The "R/Q" variants are designed for mechanical fastening (bolting) directly to a busbar or battery terminal. This provides a robust mechanical connection capable of handling vibration. * **Kelvin Connection (4-Terminal):** While the physical part may be a 2-terminal bolt-on, it is designed for a "Kelvin" sensing setup where voltage is measured across the resistive element to eliminate the resistance of the leads/bolts from the measurement. --- ### 3. Applications These parts are engineered for environments requiring extreme durability and high current measurement: 1. **Automotive Battery Management (BMS):** Measuring the State of Charge (SoC) and State of Health (SoH) by monitoring current flow in/out of EV batteries. 2. **Solar Inverters:** Monitoring DC current strings. 3. **Industrial Power Supplies:** High-capacity current shunts for protection and regulation. 4. **Forklifts and Heavy Machinery:** Power monitoring for high-torque electric motors. --- ### 4. Part Number Breakdown (Generic) | Prefix | Series | Size/Construction | Resistance | Tolerance | | :--- | :--- | :--- | :--- | :--- | | **WSBS** | Vishay Power Shunt | **15CB**: Physical size and Bolt-style | **R/Q**: Revision or specific Terminal finish | **R00010**: Value (e.g., 100 µΩ) |