Case Resistors
Crohm Series CC case resistors are frequently used for light-duty braking of variable-frequency drives, heating applications and various AC and DC load applications. Hermetically sealed components with high-temperature leads simplify installation in space-constrained environments.
Design
A sealed aluminum extrusion houses a nickel-chromium element encapsulated in ceramic-based casting material.
- Protection against corrosion
- Thermal-cycling and mechanical-shock resistance
- Efficient heat transfer while maintaining electrical isolation
- High-temperature wire leads connected before casting
Specifications
| Voltage insulation | 1000 volts |
| Insulation resistance | 1000 MΩ minimum |
| Resistance tolerance | ± 10% standard |
| Coefficient of resistivity | ~5% increase at full operating temperature |
| Operating temperature | 375 °C rise above ambient |
| Ambient temperature | Ratings based on 40 °C; decrease ~10% at 50 °C |
Ordering & part numbers
Part-number format: CC(wattage)–resistance. Example: CC400-200 = 400 watts, 200 ohms. Suffix –T specifies lead length; suffix –V specifies vertical configuration. Five standard sizes from 200–600 watts continuous in horizontal or vertical mounting.
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