The **M5R14RQJ-R** refers to a specific variation of the **M5** series of metal film resistors, typically manufactured by companies like **TE Connectivity / Neohm** or similar industrial component suppliers. Below is a detailed breakdown of the electronic specifications and part numbering logic for this component. --- ### 1. Technical Specifications The part number encodes specific electrical characteristics. Based on standard industrial nomenclature for this series, here are the specifications: | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | Metal Film Resistor | Provides high stability and low noise. | | **Resistance Value** | 1.4 Ω (Ohms) | Indicated by the "R14" code. | | **Tolerance** | ±5% | Indicated by the "J" suffix. | | **Power Rating** | 0.25W to 0.5W | Depending on the specific M5 series frame size. | | **Temperature Coeff.** | ±50 ppm/°C to ±100 ppm/°C | Standard for metal film materials. | | **Mounting Type** | Through-Hole | Axial leaded component. | --- ### 2. Part Number Breakdown To understand what each segment of **M5R14RQJ-R** represents: * **M5**: The Series designation. Usually indicates the physical size and power rating (often a professional-grade mini-resistor). * **R14**: The **Resistance Value**. In electronic coding, "R" acts as a decimal point. Therefore, R14 = 0.14Ω or 1.4Ω depending on the specific manufacturer's scaling (usually **1.4 Ohms**). * **J**: The **Tolerance code**. * *J* = ±5% * *F* = ±1% (for comparison) * **-R**: The **Packaging code**. Typically stands for "Reel" or "Tape & Reel," indicating how the parts are supplied for automated assembly. --- ### 3. Key Electronic Properties * **Metal Film Construction:** These resistors are created by depositing a thin layer of metal onto a ceramic rod. This results in better precision and lower thermal noise compared to Carbon Composition resistors. * **Low Resistance Application:** Because this part is a very low resistance value (1.4Ω), it is frequently used for: * Current sensing. * Voltage division in low-impedance circuits. * Line termination. * **Stability:** The metal film ensures that the resistance value does not drift significantly as the component heats up during operation. --- ### 4. Comparison with Standard Resistors | Attribute | Carbon Film | Metal Film (M5 series) | | :--- | :--- | :--- | | **Noise** | Higher | Very Low | | **Precision** | Lower (±10%) | Higher (±1% to ±5%) | | **Reliability** | Moderate | High |