The **FPM3252H-R010BFP** is a specialized high-power surface-mount resistor, typically utilized in current sensing and power management applications. Below is a detailed technical breakdown of its electronic characteristics. ### 1. General Specifications This component belongs to the **FPM Series**, which is designed for high precision and stability under high-current conditions. | Parameter | Specification | | :--- | :--- | | **Component Type** | Metal Plate Current Sense Resistor | | **Resistance Value** | 10 mΩ (0.010 Ω) | | **Resistance Tolerance** | ±1% (Standard for 'F' designation) | | **Power Rating** | 3W to 5W (Depending on heatsink/trace layout) | | **Temperature Coefficient (TCR)** | ±50 ppm/°C to ±75 ppm/°C | | **Package Type** | SMD (Surface Mount Device) - 3252 Metric | --- ### 2. Physical Construction The "FPM" series utilizes a **Metal Plate** construction rather than a thick-film paste. This provides several electronic advantages: * **Low Inductance:** The solid metal element reduces parasitic inductance, making it ideal for high-frequency switching power supplies. * **High Thermal Mass:** It can withstand high instantaneous pulse currents without failing. * **AEC-Q200 Compliance:** Most parts in this series are automotive-grade, ensuring durability against vibration and thermal cycling. --- ### 3. Pinout and Terminals The **3252** footprint is a wide-terminal configuration. * **Heat Dissipation:** The wider terminals allow for a larger solder contact area, which acts as a bridge to the PCB copper planes to dissipate heat. * **Kelvin Connection (Potential):** While this specific part is often a 2-terminal device, the wide pads help minimize measurement errors caused by lead resistance. --- ### 4. Application Use Cases Because the resistance is very low (10 mΩ), it is primarily used to convert current into a measurable voltage ($V = I \times R$). 1. **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in Li-ion packs. 2. **DC-DC Converters:** Providing feedback loops for over-current protection (OCP). 3. **Motor Control:** Sensing phase currents in brushless DC (BLDC) motors. 4. **Inverters:** Managing power flow in solar or industrial power modules. --- ### 5. Part Number Breakdown (Typical) * **FPM:** Series Name (Metal Plate Power Resistor). * **3252:** Physical size (approx. 3.2mm x 5.2mm). * **H:** High power rating variant. * **R010:** Resistance value ($R$ acts as decimal, $010 = 0.010 \Omega$). * **BFP:** Packaging and tolerance code (e.g., Bulk or Tape & Reel, ±1%).