The **CRE2512-R001** is a high-power, surface-mount (SMD) current sense resistor. It belongs to the CRE series manufactured by Bourns, specifically designed for low-resistance applications like power management and motor control. --- ### ## Technical Specifications The following table summarizes the primary electrical and physical characteristics of the CRE2512-R001: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 0.001 $\Omega$ (1 m$\Omega$) | | **Package Size** | 2512 (6.4 mm x 3.2 mm) | | **Power Rating** | 2 Watts (at 70°C) | | **Tolerance** | ±1% (standard) | | **Temperature Coefficient (TCR)** | ±75 ppm/°C | | **Operating Temperature** | -55°C to +170°C | | **Technology** | Metal Alloy Strip | --- ### ### Key Features 1. **Metal Strip Construction:** Unlike standard thick-film resistors, the CRE series uses a metal alloy element. This provides superior thermal stability and higher power-handling capabilities. 2. **Low Inductance:** The physical structure results in very low self-inductance (< 5 nH), which is critical for high-frequency switching circuits. 3. **High Power-to-Size Ratio:** The 2512 footprint is standard, but the metal alloy allows it to dissipate up to 2W, which is significantly higher than general-purpose resistors of the same size. 4. **AEC-Q200 Compliance:** Most parts in this series are qualified for automotive use, ensuring high reliability under stress. --- ### ### Typical Applications Because the resistance is extremely low (1 m$\Omega$), this part is used as a **shunt resistor** to measure current flow without significantly dropping the voltage of the circuit. * **Power Supplies:** Monitoring output current in DC-DC converters. * **Battery Management Systems (BMS):** Measuring charge and discharge cycles in Li-ion packs. * **Motor Control:** Detecting phase current for precise torque control. * **Consumer Electronics:** Laptop power adapters and mobile charging stations. --- ### ### How to Calculate Voltage Drop To understand how this part behaves in your circuit, use Ohm’s Law ($V = I \times R$): ```python # Example: Calculating voltage drop at 10 Amps resistance = 0.001 # 1 mOhm current = 10.0 # 10 Amps voltage_drop = current * resistance power_dissipation = (current**2) * resistance print(f"Voltage Drop: {voltage_drop} V (10mV)") print(f"Power Used: {power_dissipation} W") ```