HIGH VOLTAGE DC / DC FILTER CAPACITORS · CONTINUOUS-DUTY
High voltage DC filter capacitors for ripple smoothing and DC-link duty.
High voltage DC capacitors - also known as DC filter capacitors - smooth ripple and store charge in high voltage direct-current circuits. Marxelec builds these capacitors in capacitance values up to 5000 µF and voltages up to 160 kV DC, with low equivalent series resistance (ESR) for high ripple-current handling and long service life.
Each unit is wound from MPP film, PP film, polyester film, capacitor tissue paper, or a mixed dielectric, selected to suit the ripple-current, voltage, and temperature the circuit imposes. Construction is high-density and low-ESR, in cylindrical or rectangular form, in metal or insulated containers. Units can be dimensionally matched to capacitors already installed at site for direct replacement.
Where the DC capacitor sits in a voltage-multiplier stack, a radar modulator, or the DC link of a converter, its ripple-current rating and thermal stability determine circuit reliability - so the capacitor is engineered to the circuit's demands rather than supplied from a fixed range.
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 5000 µF
Higher on request · per application
Rated voltage
Up to 160 kV DC
Custom on request
ESR
Low
High ripple-current handling
Rated ripple current
As per customer requirement
Per application
Dissipation factor (tan δ)
Low-loss dielectric= 0.001
Service life
100,000 Hrs
Parameter
Value
Notes
Duty
Continuous DC
Ripple-current thermal loading
Ambient operating range
-10 degree to +50 Degree Celsius
Cooling
Self-cooled (standard)
Forced/liquid only for high ripple loads
Parameter
Value
Notes
Container
Metal / insulated
Per installation
Shape
Cylindrical / rectangular
Per envelope
Termination
Standard terminal type
Dimensional match
To existing unit
Direct-replacement builds
Weight
Per rating
Parameter
Value
Notes
Design & test standards
IS 13666
Manufacturing
Class 100 clean room (winding)
Per facility
Applications this capacitor is built for.
High voltage DC power supplies
Smoothing and energy storage in HVDC supplies
Voltage multiplier circuits
Cockcroft-Walton and cascade stacks
Ripple filtering
Output ripple reduction in rectified supplies
Radar systems
Modulator and supply filtering
Radio & TV transmitters
HV DC supply smoothing
Switch-mode power supplies (SMPS)
DC-link and bulk storage
Converters & inverters
DC-link capacitors
Bypass & coupling
HF bypass and DC-blocking / coupling
Railways
Traction supply filtering
Damping & commutation
Commutation and snubber support
Industrial (deionization, insect control)
Specialised HV DC loads
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.
DC voltage withstands
Withstand test at rated voltage: 125%
Insulation resistance
IR measured at 1KV.
ESR
Equivalent series resistance verified.
Dimensional
Inspection per drawing.
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Marxelec Energy Pvt. Ltd.
Plot No. L-49, MIDC Kupwad
Sangli Miraj Kupwad
Sangli, Maharashtra 416436
India
response@marxelec.com
+91 91686 18452