The **MHO+14FDG-R** refers to a high-precision, metal oxide film resistor, typically produced by manufacturers like KOA Speer or similar industrial electronic component suppliers. These are designed for high-power applications requiring stability and heat resistance. ### 1. Technical Specifications The model name can be broken down into specific electronic characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Resistor Type** | Metal Oxide Film | | **Power Rating** | 1/4W to 2W (Variable by series, but "14" often implies 1/4W or specific size code) | | **Resistance Value** | Defined by the "R" suffix (Standard Ω values) | | **Tolerance** | Usually ±1%, ±2%, or ±5% (F denotes ±1%) | | **Temperature Coefficient** | Low PPM (typically ±200ppm/°C to ±350ppm/°C) | | **Operating Temperature** | -55°C to +155°C (Up to +200°C in high-spec variants) | --- ### 2. Physical Construction The "MHO" series is built to withstand environmental stress better than standard carbon film resistors. 1. **Ceramic Core:** A high-grade ceramic rod acts as the substrate. 2. **Resistive Layer:** A thin film of metal oxide (such as Tin Oxide) is deposited on the rod. 3. **End Caps:** Flame-proof coating and tin-plated copper lead wires. 4. **Coating:** Usually coated with a non-flammable, silicon-based paint to prevent fire hazards during overload. --- ### 3. Key Features and Applications * **Flameproof Protection:** These resistors do not catch fire even when overloaded; they simply open the circuit. * **High Stability:** Excellent performance in high-humidity and high-temperature environments. * **Small Footprint:** High power-to-size ratio compared to wirewound resistors. **Common Use Cases:** * Switching Power Supplies (SMPS). * Consumer electronics (TVs, Audio equipment). * Industrial control systems. * Automotive safety circuits. --- ### 4. Circuit Representation In a schematic, this part is represented by the standard resistor symbol with the specific value indicated by the "R" code. ```markdown R1 ---[=======]--- MHO+14FDG ``` ---