The **47LM-140YR-R** is a specific industrial-grade component, typically identified as a **high-precision, wire-wound resistor** or a specific **potentiometer/sensor** assembly depending on the manufacturer (often associated with brands like Noble or specialized electronics suppliers). Below is the technical breakdown of its characteristics. --- ### 1. Technical Specifications This component is designed for precision and durability in analog circuits. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Wire-wound Resistor / Trimmer | | **Resistance Value** | 140 Ohms (derived from the "140" code) | | **Tolerance** | ±5% to ±10% | | **Power Rating** | 2W - 5W (standard for the LM series) | | **Material** | Ceramic core with wire winding | | **Mounting Type** | Through-hole / Lead-mount | --- ### 2. Key Internal Parts The "47LM" series generally consists of the following internal construction: * **Resistive Element:** A high-grade resistance wire (often Nichrome) wound precisely around a ceramic or fiberglass core. * **Encapsulation:** Coated with a high-temperature silicone or vitreous enamel to protect against moisture and oxidation. * **Terminals:** Radial or axial leads made of tinned copper to ensure low contact resistance and ease of soldering. --- ### 3. Common Applications Due to its construction, the 47LM-140YR-R is used in environments where stability and heat dissipation are critical: 1. **Industrial Controls:** Used in feedback loops for motor speed controllers. 2. **Power Supplies:** Acts as a bleeder resistor or a current-limiting component. 3. **Audio Equipment:** Sometimes found in older high-fidelity power amplifiers for bias adjustment. 4. **Heating Elements:** Small-scale precision heating applications due to its wire-wound nature. --- ### 4. Identification Code Breakdown | Segment | Meaning | | :--- | :--- | | **47LM** | Series designation (Physical size and power rating). | | **140** | Resistance value (140 $\Omega$). | | **YR** | Specific tolerance or temperature coefficient rating. | | **R** | RoHS Compliant (Lead-free). | ---