The **RL2550L-R050G** is a high-precision, low-resistance current sensing resistor, typically used in power management and overcurrent protection circuits. Below is a detailed breakdown of its technical specifications and electronic characteristics. --- ### 1. Component Overview The RL2550L series is designed for surface-mount (SMD) applications where high reliability and low thermal EMF (Electromotive Force) are required. | Feature | Specification | | :--- | :--- | | **Part Number** | RL2550L-R050G | | **Resistance Value** | 50 mΩ (0.050 Ohms) | | **Tolerance** | ±2% (indicated by 'G') | | **Power Rating** | 2 Watts (at 70°C) | | **Package Size** | 2550 (Metric: 64128) | | **Technology** | Metal Strip / Thick Film Low Ohm | --- ### 2. Detailed Technical Specifications #### Electrical Characteristics * **Temperature Coefficient (TCR):** Usually ranges between ±100ppm/°C to ±600ppm/°C depending on the specific manufacturing batch, ensuring stability across temperature fluctuations. * **Operating Temperature Range:** -55°C to +155°C. * **Inductance:** Low inductance (typically <5nH), making it suitable for high-frequency switching applications. #### Physical Dimensions (2550 Package) The "2550" designation refers to the physical footprint of the chip: * **Length:** ~6.4 mm * **Width:** ~12.8 mm * **Height:** ~0.6 mm * *Note: This is a "wide terminal" configuration, which allows for better heat dissipation compared to standard 2512 packages.* --- ### 3. Application Use Cases Due to its low resistance and high power rating, this component is commonly found in: 1. **DC-DC Converters:** To monitor output current for feedback loops. 2. **Battery Management Systems (BMS):** Measuring charge and discharge currents in lithium-ion packs. 3. **Motor Control:** Detecting stall conditions or controlling torque via current sensing. 4. **Power Supplies:** Providing overcurrent protection (OCP). --- ### 4. Part Number Breakdown (Nomenclature) * **RL:** Series code (Resistor Low Ohmic). * **2550:** Package size (2.5 x 5.0 inches nominal or 64128 metric). * **L:** Termination style/Material code. * **R050:** Resistance value (R is the decimal point = 0.050Ω). * **G:** Tolerance code (G = ±2%; F = ±1%, J = ±5%).