The part number **47LR-151R-R/Q** typically refers to a high-power, current-sensing resistor, often part of the **47LR series**. These components are specifically designed for applications requiring high precision and low resistance values to monitor electrical current. --- ### 1. Technical Specifications Below is a breakdown of the typical parameters for this electronic component: | Feature | Specification | | :--- | :--- | | **Component Type** | Current Sense Resistor | | **Resistance Value** | 150 mΩ (0.150Ω) | | **Tolerance** | ±1% (Standard for 'R' suffix) | | **Power Rating** | High Power (Typically 3W to 7W depending on size) | | **Technology** | Metal Element / Shunt | | **Temperature Coefficient** | Low (TCR < 50 ppm/°C) | --- ### 2. Part Number Breakdown While manufacturer coding can vary slightly (e.g., Ohmite, Riedon, or Vishay styles), the code generally follows this logic: * **47LR**: The series identifier, indicating a low-resistance, high-power metal element design. * **151**: The resistance code. "15" followed by "1" zero in milliohms, or a direct representation of 150mΩ. * **R**: Represents the decimal point or the tolerance (±1%). * **R/Q**: Usually indicates the packaging format (e.g., Tape & Reel) or Qualification level (e.g., AEC-Q200 for automotive grade). --- ### 3. Key Applications Because these resistors are designed to handle high current with minimal heat drift, they are used in: 1. **Battery Management Systems (BMS):** Monitoring charge and discharge cycles in lithium-ion packs. 2. **Motor Control:** Detecting current spikes to prevent motor burnout. 3. **Power Supplies:** Used in the feedback loop of DC-DC converters to regulate output. 4. **Automotive Electronics:** Sensing current in electric power steering or braking systems. --- ### 4. Physical Characteristics * **Construction:** These are usually "Metal Strip" or "Metal Plate" resistors. Unlike standard thick-film resistors, they use a solid piece of metal alloy as the resistive element. * **Durability:** They offer excellent pulse handling capabilities and are flameproof. * **Mounting:** Typically Surface Mount (SMD) with large solder pads to act as heat sinks. ---