MH25, MH37 thin film resistors product specifications, the main parameters include power, resistance, voltage, insulation voltage, temperature coefficient, resistance accuracy, standard values, thermal resistance, ambient temperature range, etc.
The MH Series from Welwyn Components offers high‑voltage metal‑film resistors with working voltages up to 3.5 kV, small size, and robust cement coating. Available in resistance values from 100 kΩ to 10 MΩ, the series includes the MH25 and MH37 types with different voltage and power capabilities.
The datasheet lists detailed electrical data, physical dimensions, construction details, and performance characteristics such as load life, derating, and overload limits. Packaging is tape‑packed for automatic insertion, and ordering requires specifying type, value, and tolerance (e.g., MH25 10MΩ 1%).
| Resistance range | 100 kΩ – 10 MΩ |
|---|---|
| Limiting element voltage | up to 3.5 kV |
| Isolation voltage | 700 V |
| Temperature coefficient (TCR) | 100 ppm/°C |
| Resistance tolerance | 1 %, 2 %, 5 % |
| Thermal impedance | 140 °C·W (MH25), 112 °C·W (MH37) |
| Ambient temperature range | -55 °C to 155 °C |
| Load at rated voltage | 1000 h at 70 °C |
| Derating | Zero at 155 °C |
| Voltage proof (minimum) | 700 V |
The MH Series resistors are rated for a high working voltage up to 3.5 kV.
Resistors are offered with 1 %, 2 %, and 5 % tolerance options.
Specify the type reference, value and tolerance, for example "MH25 10MΩ 1%".