Doorknob Capacitors10kV to 50kV

If you would like to learn more about this product: Please Contact Us

The Genvolt DXU range of Doorknob Capacitors (also referred to as a high voltage capacitor) offer output voltages from 10kV up to 50kV to meet the most stringent requirements of high voltage applications.

These high voltage ceramic capacitors are made from a ceramic dielectric and are then encapsulated in epoxy resin. The terminal threads on the capacitors are either M4 or M5, depending on model, with a thread depth of 4mm.

With capacitance values starting at 280pF (A picofarad 'pF' is one trillionth of a Farad) and then rising up to 8000pF and DC (Direct Current) voltage ratings from 10kV to 50kV depending on the model chosen.

As a high power capacitor they are designed for applications which require a low dissipation factor and a small voltage coefficient, they have excellent temperature characteristics a low partial discharge and a large capacitance.

The operating temperature range of the capacitors is between -20 to +85°C with a temperature coefficient of -4700 ±1000 ppm/°C.

The insulation resistance should be measured with DC 1000V within 60 ±5 seconds of charging.

Some common applications are:
Gas laser
DC HV power supplies
Lightning arresters
Voltage distribution systems
Electron Microscopes
Synchroscopes
Electrostatic Coating Machines

Doorknob Capacitor Features;

  • Small size
  • Low dissipation factor
  • Epoxy resin encapsulated
  • Low DC, AC - voltage coefficient
  • Excellent voltage characteristics
  • Linear temperature characteristic
  • Excellent behaviour on pulse and fast discharge

Doorknob Capacitor Applications

  • Gas laser
  • Power generators
  • High voltage dividers
  • High voltage coupling devices
  • Electrostatic coating machines
  • Electron microscopes, synchroscopes
  • Direct current high voltage power supplies
  • Lightning arresters, voltage distribution systems
  • Power line coupling system for internet and telecom

Doorknob Capacitor Values

Part No. Capacitance (pF) Capacitance
Tolerance %
DC Rated Voltage (kV) Dimensions Terminal Type
Thread & Depth
D L H
DXU-10-561 560 ± 10 10 24 20 18 M4x4mm
DXU-10-122 1200 ± 10 10 30 20 18 M4x4mm
DXU-10-282 2800 ± 10 10 40 20 18 M5x4mm
DXU-10-502 5000 ± 10 10 52 20 18 M5x4mm
DXU-10-802 8000 ± 10 10 60 16 14 M5x4mm
DXU-20-281 280 ± 10 20 24 26 24 M4x4mm
DXU-20-881 880 ± 10 20 30 26 24 M4x4mm
DXU-20-142 1400 ± 10 20 40 26 24 M4x4mm
DXU-20-252 2500 ± 10 20 52 26 24 M5x4mm
DXU-20-402 4000 ± 10 20 60 26 24 M5x4mm
DXU-30-591 590 ± 10 30 30 30 28 M4x4mm
DXU-30-941 940 ± 10 30 40 30 28 M5x4mm
DXU-30-172 1700 ± 10 30 52 30 28 M5x4mm
DXU-30-272 2700 ± 10 30 60 30 28 M5x4mm
DXU-40-441 440 ± 10 40 30 32 30 M4x4mm
DXU-40-701 700 ± 10 40 40 32 30 M5x4mm
DXU-40-132 1300 ± 10 40 52 32 30 M5x4mm
DXU-40-202 2000 ± 10 40 60 32 28 M5x5mm
DXU-50-401 400 ± 10 50 30 35 33 M4x4mm
DXU-50-651 650 ± 10 50 36 35 33 M4x4mm
DXU-50-911 910 ± 10 50 40 33 31 M4x4mm
DXU-50-112 1100 ± 10 50 52 35 33 M5x4mm
DXU-50-172 1700 ± 10 50 59 35 33 M5x4mm

Subscribe to our mailing list

Please enter your details below to register for our news and product updates.

* indicates required