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High Energy Storage, Pulse Discharge

WL–Series Capacitors

Key Features

  • Capacitance: 0.05 to 25,000 uF
  • Voltage (DC): 5000 to 100,000 Volts
  • Current (RMS): 1.0 to 100 amps
  • Current (Peak): up to 250,000 amp


WL–Series Capacitors

NWL’s WL-Series are high energy capacitors used in pulse power and power conditioning applications. With welded metal cases of stainless steel, mild steel, aluminum, or brass, these robust oil-filled capacitors offer the highest energy stored per unit, typically 3-100 kJ. Large diameter, low profile bushings provide minimum inductance for fast discharge and high frequency response compared to Equivalent NWL WF-series capacitors with upright bushings. For maximum peak power, an available option is a 100 kVDC (under oil) bushing with a coaxial current return ring enabling the capacitor to have less than 40 nH of inductance and deliver up to a 250 kA repetitive peak pulse current.

Internal construction is customized for the application and both self-healing and non-self-healing versions are available.


  • High energy Marx generators
  • Pulsed magnetic field generators
  • EM forming and impact welding
  • Electromagnetic launchers and accelerators
  • EMP simulators
  • Pulsed X-ray generators
  • Lightning simulators
  • High energy physics experiments

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Our partner NWL is a leading manufacturer of capacitors in a variety of styles, including high energy storage capacitors, pulse discharge capacitors, DC continuous voltage capacitors, input filtering capacitors, AC voltage capacitors, resonant tank capacitors, harmonic filtering capacitors, snubber protection capacitors, clamping capacitors, and commutation capacitors.