10 – 40kVdc K3500 Dielectric
Morgan Technical Ceramics Electroceramics has long experience of the manufacture of ceramic capacitors for high-voltage dc and power frequency applications.
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Test Facilities available in addition to the standard and power factor equipment include:
- Power frequency testing, 50Hz, up to 250kV
- Impulse testing up to 600kVpk
- Partial discharge testing up to 120kV
- DC testing up to 60kV
The materials used are mainly high-K Type 2 ceramics with dielectric constants from 1000 to 10,000. These materials show significant and non-linear changes in dielectric constant with temperature and voltage and also exhibit changes with time, compared to Type 1 material s.
Applications include
- High power 50/60Hz operation
- DC power supplies
- Bypass, coupling and smoothing circuitry
Medical scanners and X-ray power sources where low power ratings are required and larger capacitance changes with temperature can be tolerated.
In addition to the standard products, custom-made components can be supplied with different dimensions and electrical characteristics.
| Material Characteristics | Units | |
| EIA Category | Y5U | |
Dielectric Constant  r @ 1kHz, 20°C LV | approx 4300 | |
| Dielectric Constant r @ 50Hz, 0.35kV/mm 20°C | approx 5200 | |
| Typical Dissipation Factor @ 1kHz 20°C LV | % | =<1.0 |
| Insulation Resistance @ 500V, 20°C | ohm | >=1010 |
| Ageing Rate per decade hour | % | -3.5 |
| Maximum operating Temperature at full dc rated voltage | °C | +60 |
| All dimensions in mm, ±1.0mm |  |
Rated Voltage 10kV dc (3kV 50Hz)
| Type | Cap Value | Test Voltage 1 min dc | Test Voltage 1 min 50Hz | Discharge Free Test <5pC | øD | L | T | Thread Size |
|---|---|---|---|---|---|---|---|---|
| pF±20% | kV | kV | kV 50Hz | mm | mm | mm | mm | |
| 07536 | 1000 | 15 | 10 | 3 | 22 | 28 | 8 | M4 |
| 07537 | 2000 | 15 | 10 | 3 | 27 | 28 | 8 | M4 |
| 07538 | 3000 | 15 | 10 | 3 | 31 | 28 | 8 | M4 |
| 07755 | 4000 | 15 | 10 | 3 | 36 | 28 | 8 | M4 |
| 07756 | 5000 | 15 | 10 | 3 | 40 | 28 | 8 | M4 |
| 07539 | 6300 | 15 | 10 | 3 | 45 | 28 | 9 | M5 |
| 07757 | 8000 | 15 | 10 | 3 | 49 | 28 | 9 | M5 |
| 07758 | 10000 | 15 | 10 | 3 | 56 | 28 | 9 | M5 |
Rated Voltage 20kV dc (5kV 50Hz)
| Type | Cap Value | Test Voltage 1 min dc | Test Voltage 1 min 50Hz | Discharge Free Test <5pC | øD | L | T | Thread Size |
|---|---|---|---|---|---|---|---|---|
| pF±20% | kV | kV | kV 50Hz | mm | mm | mm | mm | |
| 07540 | 500 | 30 | 20 | 6 | 22 | 36 | 8 | M4 |
| 07541 | 1000 | 30 | 20 | 6 | 27 | 36 | 8 | M4 |
| 07542 | 1500 | 30 | 20 | 6 | 31 | 36 | 8 | M4 |
| 07543 | 2000 | 30 | 20 | 6 | 36 | 36 | 8 | M4 |
| 07544 | 3000 | 30 | 20 | 6 | 45 | 36 | 9 | M5 |
| 07559 | 4000 | 30 | 20 | 6 | 49 | 36 | 9 | M5 |
| 07545 | 5000 | 30 | 20 | 6 | 56 | 36 | 9 | M5 |
| 07836 | 10000 | 30 | 20 | 6 | 78 | 37.6 | 10 | M6 |
| 07872 | 20000 | 30 | 20 | 6 | 110 | 37.6 | 10 | M6 |
Rated Voltage 30kV dc (7kV 50Hz)
| Type | Cap Value | Test Voltage 1 min dc | Test Voltage 1 min 50Hz | Discharge Free Test <5pC | øD | L | T | Thread Size |
|---|---|---|---|---|---|---|---|---|
| pF±20% | kV | kV | kV 50Hz | mm | mm | mm | mm | |
| 07760 | 400 | 45 | 28 | 8 | 22 | 41 | 8 | M4 |
| 07061 | 700 | 45 | 28 | 8 | 27 | 41 | 8 | M4 |
| 07761 | 1000 | 45 | 28 | 8 | 31 | 41 | 8 | M4 |
| 07121 | 1500 | 45 | 28 | 8 | 36 | 41 | 8 | M4 |
| 07534 | 2200 | 45 | 28 | 8 | 45 | 41 | 9 | M5 |
| 07762 | 3000 | 45 | 28 | 8 | 49 | 41 | 9 | M5 |
| 07763 | 3700 | 45 | 28 | 8 | 56 | 41 | 9 | M5 |
| 07514 | 5000 | 45 | 28 | 8 | 66 | 41 | 9 | M5 |
Rated Voltage 40kV dc (8kV 50Hz)
| Type | Cap Value | Test Voltage 1 min dc | Test Voltage 1 min 50Hz | Discharge Free Test <5pC | øD | L | T | Thread Size |
|---|---|---|---|---|---|---|---|---|
| pF±20% | kV | kV | kV 50Hz | mm | mm | mm | mm | |
| 07764 | 350 | 60 | 35 | 10 | 22 | 46 | 8 | M4 |
| 07765 | 570 | 60 | 35 | 10 | 27 | 46 | 8 | M4 |
| 07766 | 750 | 60 | 35 | 10 | 31 | 46 | 8 | M4 |
| 07122 | 1000 | 60 | 35 | 10 | 36 | 46 | 8 | M4 |
| 07767 | 1800 | 60 | 35 | 10 | 45 | 46 | 9 | M5 |
| 07768 | 2300 | 60 | 35 | 10 | 49 | 46 | 9 | M5 |
| 07769 | 3000 | 60 | 35 | 10 | 56 | 46 | 9 | M5 |
| 07770 | 4000 | 60 | 35 | 10 | 66 | 46 | 9 | M5 |
| 07771 | 5000 | 60 | 35 | 10 | 70 | 46 | 9 | M5 |
| 07772 | 7500 | 60 | 35 | 10 | 95 | 46 | 13 | 3 x M8 |
| 07773 | 10000 | 60 | 35 | 10 | 102 | 46 | 13 | 3 x M8 |
| 07892 | 10000 | 60 | 35 | 10 | 102 | 43 | 15 | M5 |
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