The **MHO+45FDG-R** refers to a high-precision, high-voltage thick film resistor, typically manufactured by companies like **KOA Speer** or similar specialized industrial component makers. These parts are designed for applications requiring high stability and high voltage handling. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary electronic characteristics: | Parameter | Typical Specification | | :--- | :--- | | **Resistor Type** | Metal Glaze / Thick Film | | **Resistance Value** | 4.5 MΩ (45 x 10^5) | | **Tolerance** | ±0.5% to ±1% (indicated by 'F' or 'D') | | **Temperature Coefficient** | ±50 ppm/°C or ±100 ppm/°C | | **Power Rating** | 0.5W to 2W (depending on physical size) | | **Mounting Type** | Through-hole (Radial or Axial Lead) | --- ### 2. Breakdown of the Model Name Electronic part numbers are often alphanumeric codes where each section represents a specific feature: * **MHO**: Usually denotes the series (Metal Glaze High Voltage Oxide). * **45F**: Represents the resistance value. "45" is the base, followed by a multiplier. * **D**: Often indicates the precision tolerance (e.g., ±0.5%). * **G**: Can refer to the TCR (Temperature Coefficient of Resistance) or specialized coating. * **R**: Generally signifies "RoHS Compliant" or "Radial" lead configuration. --- ### 3. Construction and Materials The MHO+ series is built to withstand electrical stress that would destroy standard carbon film resistors. 1. **Substrate**: High-grade ceramic core for superior heat dissipation. 2. **Resistive Element**: A ruthenium oxide-based "thick film" paste is screen-printed onto the ceramic. 3. **Encapsulation**: Coated with a high-dielectric silicone or epoxy resin to prevent arcing and protect against moisture. 4. **Terminations**: Solder-plated copper leads for secure PCB mounting. --- ### 4. Common Applications These components are not found in consumer electronics like smartphones; they are utilized in specialized industrial equipment: * **Medical Devices**: X-ray machines and MRI scanners (high voltage power supplies). * **Industrial Testing**: Oscilloscopes and high-voltage probes. * **Power Distribution**: Monitoring circuits in power grids and transformers. * **Precision Instrumentation**: Circuits where resistance must remain constant despite temperature fluctuations. ---