### Technical Overview of UR732ATTDR10F The **UR732ATTDR10F** is a high-precision, current-sensing thick film chip resistor manufactured by **KOA Speer Electronics**. It is specifically designed for low-resistance applications where accurate current measurement and power management are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | KOA Speer Electronics | | **Resistance Value** | 0.10 Ohms (100 mΩ) | | **Tolerance** | ±1% (F) | | **Power Rating** | 0.25W (1/4 Watt) | | **Package / Case** | 0805 (2012 Metric) | | **Temperature Coefficient (TCR)** | ±100 ppm/°C | | **Technology** | Thick Film | | **Operating Temperature** | -55°C to +155°C | --- ### 2. Detailed Breakdown of the Part Number The part number follows a specific nomenclature used by KOA Speer: * **UR73**: Series name (Current sensing thick film resistor). * **2A**: Size code (0805 Imperial / 2012 Metric). * **T**: Termination material (Standard Sn plating). * **TD**: Packaging (7" 2mm pitch punched paper tape). * **R10**: Resistance value (R indicates decimal; R10 = 0.10Ω). * **F**: Resistance tolerance (±1%). --- ### 3. Features and Benefits * **Low Resistance:** Allows for current sensing with minimal voltage drop and power loss. * **High Reliability:** The thick film construction provides robust performance in harsh environments. * **Small Form Factor:** The 0805 package is ideal for high-density surface mount (SMT) applications. * **AEC-Q200 Qualified:** Suitable for automotive applications requiring high durability and reliability. --- ### 4. Common Applications This component is typically found in circuits where monitoring current flow is necessary to protect the system or manage power: 1. **Battery Management Systems (BMS):** Monitoring charge/discharge rates. 2. **DC-DC Converters:** Providing feedback for current-mode control loops. 3. **Motor Controllers:** Sensing phase currents for torque or speed regulation. 4. **Power Supplies:** Overcurrent protection and load monitoring. --- ### 5. Footprint (0805) ```text Dimensions (approximate): L: 2.0mm ± 0.2mm W: 1.25mm ± 0.1mm T: 0.5mm ± 0.1mm ```