The **TLM2HDR10JTE** is a high-precision, surface-mount (SMD) metal plate current sense resistor manufactured by **KOA Speer Electronics**. It is designed specifically for power management and current detection in automotive and industrial circuits. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 10 mΩ (0.010 Ohms) | | **Tolerance** | ±5% (indicated by 'J') | | **Power Rating** | 0.5 Watts (1/2 W) | | **Package Size** | 0805 (2.0mm x 1.25mm) | | **Technology** | Metal Plate (provides superior stability) | | **Operating Temp Range** | -55°C to +155°C | | **TCR (Temp. Coefficient)** | ±100 ppm/°C | --- ### 2. Physical Construction and Parts The component is built using a "Metal Plate" architecture, which differs from standard thick-film resistors: 1. **Resistive Element:** A solid metal alloy plate. This allows for very low resistance values and high heat dissipation compared to carbon or ceramic-based resistors. 2. **Protective Coating:** A specialized flame-retardant epoxy or resin coating to protect the alloy from oxidation. 3. **Terminations:** Solderable end-caps (usually Sn/Ag/Cu) designed to handle high current flow without melting or degrading. --- ### 3. Applications and Use Cases Because this part has a very low resistance (10 mΩ), it is used as a **Shunt Resistor**. Its primary functions include: * **Current Sensing:** Measuring the voltage drop across the resistor ($V = I \times R$) to determine the current flowing through a circuit. * **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in portable electronics or automotive batteries. * **DC-DC Converters:** Providing feedback loops for power regulation. * **Motor Control:** Detecting overcurrent conditions to prevent motor burnout. --- ### 4. Part Number Breakdown (Nomenclature) * **TLM:** Product series (Metal Plate Current Sense Resistor). * **2H:** Size code (0805 metric/imperial equivalent). * **D:** Specific material/construction type. * **R10:** Resistance value (R denotes decimal; R10 = 0.10 $\Omega$ or 10 m$\Omega$). * **J:** Resistance tolerance (J = ±5%). * **TE:** Packaging (Embossed Plastic Taping).