The **MHO+56FDG-R** refers to a high-precision, metal oxide film resistor manufactured by **KOA Speer Electronics** (or similar manufacturers following the MHO series standard). These components are designed for high-power applications where reliability and stability are critical. --- ### 1. Part Breakdown (Nomenclature) The part number is structured to define its physical and electrical characteristics: | Code Segment | Description | Specific Detail | | :--- | :--- | :--- | | **MHO** | Series Name | Metal Oxide Film Resistor (High Power Type) | | **+** | Construction | Indicates specific lead/coating configuration | | **56** | Body Size/Power | Refers to the physical dimensions (often 2W to 5W depending on casing) | | **FDG** | Tolerance/TCR | Represents the Temperature Coefficient and Tolerance | | **-R** | Resistance/RoHS | Indicates Resistance value (or "R" for RoHS compliance) | --- ### 2. Key Technical Specifications These resistors are favored in industrial electronics due to their ability to handle heat and resist environmental stress. * **Material:** Metal Oxide Film. These are superior to carbon film resistors because they can withstand higher temperatures and are non-flammable. * **Flame Retardancy:** The "MHO" series typically features a multi-layer flame retardant coating (UL94 V-0 equivalent). * **Operating Temperature:** Generally rated for **-55°C to +200°C**. * **Stability:** High stability against moisture and load life tests. --- ### 3. Electrical Characteristics Typical performance metrics for this class of component include: | Feature | Typical Value | | :--- | :--- | | **Power Rating** | 2 Watts to 5 Watts (depending on the "56" chassis size) | | **Tolerance** | ±1% (F) or ±5% (J) | | **Dielectric Strength** | 500V - 1000V AC | | **TCR** | ±200 ppm/°C to ±350 ppm/°C | --- ### 4. Common Applications Because of the high-power density and heat resistance, these parts are found in: 1. **Power Supplies:** Used as bleeder resistors or in-rush current limiters. 2. **Motor Controllers:** Handling feedback loops in industrial drives. 3. **Automotive Electronics:** Used in lighting circuits and ECU power management. 4. **Audio Equipment:** High-wattage output stages in amplifiers. ---