Based on the part number **38-R144J3000**, this typically refers to a high-precision **SMD (Surface Mount Device) Resistor**, often produced by manufacturers like *Ohmite* or as part of specific industrial supply chains (like those used in CNC or power electronics). Below is the technical breakdown of the characteristics typically associated with this component. --- ### 1. Component Specifications The nomenclature suggests a high-wattage or specialized thick-film resistor. Here are the common technical parameters: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Fixed Resistor | | **Resistance Value** | 0.144 Ohms (indicated by R144) | | **Tolerance** | ±5% (indicated by 'J') | | **Power Rating** | 3 Watts (indicated by '3000' series/suffix) | | **Technology** | Thick Film or Wirewound (Molded) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Part Number Breakdown Understanding the code helps in identifying replacements or alternatives: * **38-**: Often a manufacturer-specific prefix or series identifier (commonly seen in industrial electronics distributors). * **R144**: This represents the **Resistance Value**. The "R" acts as a decimal point. * *R144 = 0.144 Ohms.* * **J**: This is the **Tolerance Code**. * *J = ±5%* * *F = ±1%* * *K = ±10%* * **3000**: Generally refers to the **Power Rating** or Package Size. In many series, "3000" corresponds to a 3-Watt power handling capability. --- ### 3. Common Applications Due to the low resistance (0.144 $\Omega$) and high power rating (3W), this part is typically used for: 1. **Current Sensing:** Measuring the voltage drop across the resistor to determine the current flowing through a circuit. 2. **Power Supplies:** Used in feedback loops or as a shunt resistor. 3. **Motor Controllers:** Monitoring current to prevent over-current conditions in industrial motors. 4. **LED Drivers:** Regulating the current to high-power LED arrays. --- ### 4. Physical Characteristics * **Package:** Usually a large-format SMD package (e.g., 2512 or larger molded heatsink style) to dissipate the heat generated by 3 Watts of power. * **Material:** Encapsulated in a flame-retardant epoxy or ceramic to ensure stability under thermal stress.