Based on the part number provided, **135R-R0075** typically refers to a high-precision, current-sensing power resistor. These components are commonly used in industrial and power management applications. --- ### 1. Component Overview The **135R Series** represents a line of four-terminal (Kelvin) precision current sense resistors. The suffix **R0075** indicates the specific resistance value. | Specification | Details | | :--- | :--- | | **Component Type** | Current Sense Resistor (Shunt) | | **Resistance Value** | 0.0075 $\Omega$ (7.5 m$\Omega$) | | **Configuration** | 4-Terminal (Kelvin Connection) | | **Technology** | Metal Element / Shunt | --- ### 2. Key Features * **Four-Terminal Design:** By using two terminals for current flow and two for voltage sensing, the component eliminates the effects of lead and contact resistance, ensuring high accuracy. * **Low Inductance:** Designed for high-frequency switching environments. * **Temperature Stability:** Usually features a low Temperature Coefficient of Resistance (TCR) to prevent resistance drift as the part heats up. * **High Power Dissipation:** Built to handle significant current loads without failure. --- ### 3. Technical Specifications (Typical) While exact specs can vary slightly by manufacturer (such as Ohmite or Riedon), typical values for this series include: | Parameter | Value Range | | :--- | :--- | | **Tolerance** | $\pm$0.1% to $\pm$1% | | **Power Rating** | 3W to 10W (Depending on mounting/cooling) | | **TCR** | $\pm$20 ppm/°C to $\pm$50 ppm/°C | | **Operating Temp** | -55°C to +155°C | --- ### 4. Common Applications This part is specifically used where precise measurement of electrical current is required: 1. **Battery Management Systems (BMS):** Monitoring charge and discharge cycles. 2. **Motor Control:** Feedback loops for torque and speed regulation. 3. **Power Supplies:** Overcurrent protection and output regulation. 4. **DC-to-DC Converters:** Efficiency monitoring and load balancing. --- ### 5. Part Number Breakdown * **135R:** The series identifier (Standard 4-terminal shunt). * **R0075:** The ohmic value. The "R" acts as a decimal point. * $R0075 = 0.0075 \Omega$ * $R010 = 0.010 \Omega$