The **TLM2HDR10FTD** is a specialized precision current-sensing resistor manufactured by **KOA Speer Electronics**. This component belongs to the TLM series, which is designed for high-reliability applications requiring high precision and low resistance values. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the TLM2HDR10FTD: | Parameter | Specification | | :--- | :--- | | **Resistance Value** | 100 mΩ (0.1 Ω) | | **Tolerance** | ±1.0% (F) | | **Power Rating** | 0.25 Watts (1/4 W) | | **Temperature Coefficient (TCR)** | ±100 ppm/°C | | **Package Size** | 0805 (Inch) / 2012 (Metric) | | **Operating Temperature** | -55°C to +155°C | | **Construction** | Metal Plate / Thick Film Hybrid | --- ### 2. Functional Breakdown #### High Precision Sensing The "10FTD" suffix indicates a **1% tolerance** with a **100mΩ resistance**. This low ohmic value allows the part to be placed in series with a load to measure current flow by monitoring the voltage drop across the resistor ($V = I \times R$), minimizing power loss as heat. #### Thermal Stability With a TCR of **±100 ppm/°C**, this component is highly stable. As the circuit heats up during operation, the resistance value remains consistent, ensuring that current measurements remain accurate across the full temperature range. #### Durable Construction The TLM series typically utilizes a metal plate or reinforced thick-film construction. This makes it more robust against current surges compared to standard general-purpose thick-film resistors. --- ### 3. Common Applications Due to its precision and low resistance, the TLM2HDR10FTD is commonly found in: * **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in mobile devices or power tools. * **DC-DC Converters:** Providing feedback for current-mode control loops. * **Motor Control:** Detecting over-current conditions to protect circuitry. * **Automotive Electronics:** Used in various ECU modules for power distribution monitoring. --- ### 4. Part Number Decoder | Code | Meaning | | :--- | :--- | | **TLM** | Series Name (Metal Plate/Thick Film Low Ohm) | | **2H** | Size Code (0805 / 2.0mm x 1.25mm) | | **R10** | Resistance Value (R10 = 0.10Ω or 100mΩ) | | **F** | Tolerance (F = ±1.0%) | | **TD** | Packaging (Typically Paper Tape / 7" Reel) |