ENERGY STORAGE / DISCHARGE CAPACITORS · PULSE-DUTY
Energy storage capacitors for high-current pulse discharge.
Energy storage capacitors - also known as energy discharge capacitors, pulse forming network (PFN) capacitors, impulse capacitors, and thumping capacitors - store electrical energy and release it as a high-current pulse on demand. Marxelec designs and builds these capacitors to the discharge profile of the end application, in capacitance values up to 50 µF and voltages up to 160 kV DC, with peak discharge currents exceeding 500 kA.
Each unit is wound from MPP film, PP film, polyester film, capacitor tissue paper, or a mixed dielectric - selected to suit the duty cycle, pulse repetition rate, and discharge energy the application requires. Construction is low-inductance, with equivalent series inductance (ESL) from 15 nH and coaxial termination available where pulse rise-time is critical. Units are built in cylindrical or rectangular form, in metal or insulated containers, and can be dimensionally matched to capacitors already installed at site for direct replacement.
The range serves defence, research, medical, and industrial applications where a controlled, repeatable high-energy discharge is required. Where a standard rating does not fit the application, the capacitor is engineered to specification.
Individually tested before dispatch.
The full technical envelope. Each unit despatched carries a signed test certificate naming the measured value of every line below.
Parameter
Value
Notes
Capacitance
Up to 50 µF
Higher on request · per application
Rated voltage
Up to 160 kV DC
DC / pulsed · custom on request
Peak discharge current
> 500 kA
Application-dependent
Equivalent series inductance (ESL)
Lowest 15 nH
Lowest with coaxial construction
Voltage reversal
> 80%
Suited to oscillatory discharge
Charge hold
Up to 5 min
Per duty cycle
Service life
1 x 10⁷ discharges
Verified by in-house life testing
Dissipation factor (tan δ)
Low-loss BOPP dielectric · value
< 0.001
Energy
Upto 50KJ Single can
Parameter
Value
Notes
Duty
Pulse / discharge
Charge-discharge cycle, not continuous
Ambient operating range
-40 to +85 degree Celsius
Cooling
Self-cooled (standard)
Forced cooling only where high PRR requires it
Parameter
Value
Notes
Container
Metal / insulated
Metal with coaxial low-inductance construction
Shape
Cylindrical / rectangular
Per installation envelope
Termination
Coaxial low-inductance
Where pulse rise-time matters
Dimensional match
To existing unit
Direct-replacement builds
Weight
Lowest Possible
Depends on rating and container
Parameter
Value
Notes
Design & test standards
IS 13666
Life testing
In-house
Energy storage capacitor life testing
Manufacturing
Class 100 clean room (winding)
Per company facility
Applications this capacitor is built for.
Pulse forming networks (PFN)
High pulse-repetition-rate discharge networks
Impulse & Marx generators
High-voltage impulse generation for test and research
Laser systems
Flash-lamp and laser-beam pumping supplies
Radar systems
Pulsed power supply for radar transmitters
Flash tubes
High-energy flash and strobe discharge
Metal forming
Electromagnetic / pulse metal-forming presses
Cable fault location
Cable thumpers / fault locators
Magnetizers & de-magnetizers
Pulse magnetisation of components
Medical equipment
Defibrillators, X-ray, and radiotherapy discharge supplies
Defence & research
Pulsed-power test and discharge applications
Aerospace Vehicle Launching
Pulsed-power capacitors engineered for ground-based aerospace propulsion research and test facility applications.
Built to the required form factors.
Every unit is built to the customer's mechanical specification. Container, shape, and termination are confirmed at order stage. Below - the standard configurations we build.
Tested against the application inspection plan.
In the applications a unit goes into, a sampling failure is a deployed failure. Every unit ships with a signed test certificate listing the measured value of each test below.
Capacitance & dissipation factor
Capacitance to tolerance = +- 5%, +-10%.; tan δ against spec: < 0.001
Voltage withstand
DC withstand test per rating: 110%.
Life / discharge endurance
Discharge cycling to verify rated life (1 x 107). In-house.
Peak discharge current
Verification of rated peak current where specified.
Inductance (ESL)
ESL verified on low-inductance variants.
Insulation resistance & dimensional
IR at rated voltage; dimensional inspection per drawing.
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Share the details you have: voltage, capacitance, frequency, current, duty cycle, cooling method, application context, drawing, existing part number, nameplate photograph or failed sample details. The first message does not need to be complete. It needs to start the technical review. Our team will respond within two working days.
Marxelec Energy Pvt. Ltd.
Plot No. L-49, MIDC Kupwad
Sangli Miraj Kupwad
Sangli, Maharashtra 416436
India
response@marxelec.com
+91 91686 18452