The **RL3720T-R10-G** is a high-precision, low-resistance chip resistor manufactured by **Susumu**. It belongs to the RL series, which is specifically designed for current sensing applications. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Resistance** | 0.1 $\Omega$ (100 m$\Omega$) | | **Tolerance** | ±2% (indicated by 'G') | | **Power Rating** | 1.0 Watt | | **Temperature Coefficient (TCR)** | ±100 ppm/°C | | **Package Size (Inch)** | 1508 (Metric: 3720) | | **Operating Temperature** | -55°C to +125°C | | **Technology** | Metal Foil / Thin Film | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific properties of the part: * **RL**: Series name (Low resistance chip resistors). * **3720**: Case size (3.7mm x 2.0mm). * **T**: Terminal configuration (Long-side terminals for better heat dissipation). * **R10**: Resistance value ($0.10 \Omega$). * **G**: Tolerance (±2%). --- ### 3. Key Features and Advantages #### Long-Side Terminations Unlike standard resistors where terminals are on the short ends, the "T" version has terminals on the **long sides**. This provides: * **Lower Inductance:** Crucial for high-frequency switching circuits. * **Better Heat Dissipation:** Larger surface area for the solder joint allows the part to handle 1W in a relatively small footprint. #### Current Sensing Accuracy Because it uses thin-film technology on a ceramic substrate, it maintains high stability over time and temperature compared to thick-film alternatives. --- ### 4. Typical Applications The RL3720T-R10-G is commonly found in circuits requiring precise monitoring of current flow: 1. **DC-DC Converters:** Used as a sense resistor to monitor output current. 2. **Battery Management Systems (BMS):** Measuring charge and discharge rates in portable electronics. 3. **Motor Control:** Detecting overcurrent conditions to protect the motor drivers. 4. **Power Inverters:** Used in feedback loops for power regulation. ---