The **CRE2512-R007** is a high-power, surface-mount (SMD) shunt resistor commonly used for current sensing applications. It is manufactured by brands like **Bourns**. --- ### ## Technical Specifications Below is a breakdown of the core technical parameters for this specific part number: | Feature | Specification | | :--- | :--- | | **Resistance Value** | 0.007 Ohms (7 mΩ) | | **Package Size** | 2512 (6.4 mm x 3.2 mm) | | **Power Rating** | 2 Watts (at 70°C) | | **Tolerance** | Typically ±1% (Standard) | | **Temperature Coefficient (TCR)** | ±75 ppm/°C (Depending on exact series) | | **Technology** | Metal Alloy / Metal Strip | | **Operating Temperature** | -55°C to +170°C | --- ### ### Key Features & Components 1. **Metal Strip Construction:** Unlike standard thick-film resistors, the CRE series uses a solid metal alloy element. This provides superior thermal stability and allows the component to handle high current pulses without degrading. 2. **Low Resistance (R007):** The "R007" in the part number signifies **0.007 Ω**. This ultra-low resistance is designed to minimize power loss ($P = I^2R$) while providing a measurable voltage drop for a microcontroller or current-sense amplifier. 3. **Low Inductance:** The flat, SMD metal strip design results in very low parasitic inductance (typically <5 nH), making it ideal for high-frequency switching power supplies. --- ### ### Common Applications The CRE2512-R007 is primarily found in circuits where monitoring current flow is critical: * **BMS (Battery Management Systems):** Monitoring charge and discharge cycles in Li-ion packs. * **Motor Control:** Feedback loops for BLDC or stepper motor drivers. * **DC-DC Converters:** Sensing output current for overcurrent protection (OCP). * **Power Inverters:** Used in solar or automotive power electronics. --- ### ### Calculating the Voltage Drop To use this part in a circuit, you can calculate the voltage output based on the current passing through it ($V = I \times R$): | Current (I) | Resistance (R) | Voltage Drop (V) | Power Dissipation ($P$) | | :--- | :--- | :--- | :--- | | 1 A | 0.007 Ω | 7 mV | 0.007 W | | 10 A | 0.007 Ω | 70 mV | 0.7 W | | 16.9 A | 0.007 Ω | ~118 mV | ~2.0 W (Max Rating) | ---