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The MG precision high-voltage axial resistor range with extended values from Caddock offers a resistance range from 600Ω up to 10GΩ and a voltage rating up to 30kV with the possibility of 1.5 times maximum continuous operating voltage for 5 seconds. The power rating for these resistors is up to 15W with the possibility of 5 times rated power for 5 seconds (not exceeding maximum voltage). The MG series offers tolerances of ±1% and ±5% and has demonstrated stability of 0.01% per 1,000 hours in extended load life testing. Caddock’s Micronox® resistance films are the source of their outstanding combination of performance features.
- Cylindrical high voltage axial leaded resistor
- Resistance values from 600Ω up to 10GΩ *
- Tolerances of ±1% and ±5%
- TCR as tight as ±80 ppm/°C from +25°C to +105°C, -200 ppm/°C to +50 ppm/°C from -15°C to +25°C
- Operating Temperature Range of -55°C to +225°C
- Maximum operating voltage from 2kV up to 30kV *
- Maximum power rating from 1.5W up to 15W *
- Excellent long-term stability of 0.01% per 1,000 hours
- All models are manufactured with Caddock’s non-inductive design
* Dependant on selected resistor model
Typical applications for the MG precision high-voltage axial resistor range with extended values include:
- TWT HV power supplies
- Electron microscopes
- E-beam equipment
- Electrical distribution HV monitor dividers
- X-ray systems
- Geophysical instruments
- Medical electronics
- HV & Compact instrument probes
Caddock MG Extended Range Specification Table
| Model No. | Wattage | Max voltage | Coating dielectric strength | Resistance range | Tolerance | TCR |
|---|---|---|---|---|---|---|
| MG717 | 1.5W | 2kV | 750ACrms | 600Ω to 225MΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG721 | 2W | 4kV | 750ACrms | 200Ω to 300MΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG730 | 3W | 6kV | 1000ACrms | 500Ω to 750MΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG731 | 2.6W | 4kV | 1000ACrms | 200Ω to 750MΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG735 | 3.6W | 10kV | 1000ACrms | 750Ω to 1GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG740 | 3.6W | 6kV | 1000ACrms | 300Ω to 1.5GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG745 | 5W | 15kV | 1000ACrms | 1kΩ to 1.5GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG750 | 5W | 10kV | 1000ACrms | 400Ω to 2.5GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG780 | 7.5W | 15kV | 1000ACrms | 600Ω to 3.75GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG785 | 8W | 20kV | 1000ACrms | 800Ω to 5GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG810 | 10W | 25kV | 1000ACrms | 1kΩ to 6.25GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
| MG815 | 15W | 30kV | 1000ACrms | 1kΩ to 10GΩ | ±1% / ±5% | ±80 ppm/°C from +25°C to +105°C -200 ppm/°C to +50 ppm/°C from -15°C to +25°C |
Caddock Electronics, Inc. manufactures High Performance, High Stability Film Resistors designed for precision applications. Caddock uses unique resistance film technologies and process technologies to create solutions for performance demanding applications. Their product line consists of over 250 models, spanning a multitude of series, all of which are manufactured at their facilities in Roseburg, Oregon, USA. Please visit www.caddock.com for more information.
