The **TLM2HDR10JTD** is a high-precision, low-resistance metal plate chip resistor manufactured by **KOA Speer Electronics**. This specific part is designed for current sensing applications in power management circuits. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its core specifications: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Series** | TLM | Metal plate type, low resistance | | **Size** | 2H | 2012 Metric (0805 Imperial) | | **Terminal** | D | Indium-plated (Standard for this series) | | **Resistance** | R10 | 0.10 $\Omega$ (100 m$\Omega$) | | **Tolerance** | J | ±5% | | **Packaging** | TD | 7" 4mm pitch punched paper tape | --- ### 2. Key Technical Specifications The electrical characteristics of the TLM2HDR10JTD are optimized for stability and thermal management. * **Resistance Value:** 100 m$\Omega$ (0.1 $\Omega$). * **Power Rating:** 0.25 Watts (1/4 W) at 70°C. * **Tolerance:** ±5% (J-grade). * **Temperature Coefficient (TCR):** Typically ±100 ppm/°C to ±250 ppm/°C (varies by specific sub-batch, check datasheet for exact range). * **Operating Temperature:** -55°C to +155°C. * **Construction:** Metal plate element which provides superior heat dissipation compared to thick film resistors. --- ### 3. Application Use Cases Because this is a low-ohmic metal plate resistor, it is primarily used for **Current Sensing**: 1. **Battery Management Systems (BMS):** Monitoring charge/discharge cycles in portable electronics. 2. **DC-DC Converters:** Measuring output current to ensure voltage regulation and overcurrent protection. 3. **Motor Control:** Detecting stall conditions or controlling torque via current feedback. 4. **CPU/GPU Power Rails:** Sensing high-speed current fluctuations in computing hardware. --- ### 4. Advantages of Metal Plate Construction Compared to standard thick-film resistors, the TLM series offers several benefits: * **Low Noise:** Metal plate elements produce significantly less thermal noise. * **High Surge Capability:** The solid metal construction can handle brief current spikes better than film-based resistors. * **Thermal Stability:** They maintain their resistance value more accurately as the component heats up. ---