IMPORT SUBSTITUTE CAPACITORS · INDIGENISATION

Import-substitute capacitors for special applications.

APPROACH Matched to the original
BASIS Sample, nameplate, or spec
OUTCOME Direct replacement, made in India
Marxelec WC-MF series - water-cooled medium-frequency capacitor units, varying configurations
Marxelec WC-MF series - water-cooled medium-frequency capacitor units, varying configurations
Marxelec WC-MF series - water-cooled medium-frequency capacitor units, varying configurations
01 / 03

Many special-application capacitors - in defence, research, and heavy industry - have historically been imported, leaving users exposed to long lead times, high cost, currency risk, and uncertain supply. Marxelec builds indigenous replacements for these imported units: capacitors matched to the electrical rating and the physical dimensions of the original, so they fit and perform as a direct replacement.

Because Marxelec designs and manufactures the full construction in-house - winding in a Class-100 clean room, with a bi-axially oriented polypropylene (BOPP) dielectric, 99% purity aluminium foil, and NPCB oil - a replacement can be developed from a sample, a nameplate, or a specification, without dependence on the original manufacturer. The company's founder has developed special-application capacitors for Indian research and defence organisations over a 37-year career, and that experience underpins the import-substitution work.

Where an imported capacitor is expensive, slow to source, or no longer supported, an indigenous equivalent removes that dependency - often at a lower total cost of ownership.

Approach Dimensional + electrical match
Basis for build Sample / nameplate / spec
Platform Full Marxelec product range
Manufacture In-house, Class-100 clean room
Outcome Replacement design confirmed after engineering review

How it works

Import Substitution Work
Process

01

Assess

Original capacitor reviewed from a sample, nameplate, drawing, or specification.

02

Engineer

Electrical rating and physical envelope reverse-engineered to a manufacturable design.

03

Build

Manufactured in-house on the BOPP / all-film platform, wound in a Class-100 clean room.

04

Test

Verified against the target specification before despatch.

05

Replace

Supplied as a dimensional and electrical match for direct replacement

Full specifications

Specification Envelope

whatever the imported unit is, it likely sits inside one of these envelopes.

Product family

Indicative envelope

Energy storage / discharge (ESC)

Up to 1000 µF · 160 kV DC · >500 kA

High voltage DC / filter

Up to 5000 µF · 160 kV DC

HT / HV power / PF

Units to 750 kVAr, 24 kV; banks to 20 MVAr, 110 kV

LT / LV power / PF

Units to 100 kVAr, 1 kV; banks to 1000 kVAr

Surge / RC

3.3-36 kV systems · impulse to 190 kVp

Water-cooled MF/HF

Up to 7200 kVAr · 4.4 kV · 50 kHz

Common construction across all: BOPP dielectric · 99% aluminium foil · NPCB oil · Class-100 clean-room winding.

Where it's deployed

Applications this capacitor is built for.

01

Defence & research

Special-application capacitors for research and defence organisations

02

Steel & metal industries

Furnace and heavy-industry capacitors

03

High voltage test & metrology

Test-lab and measurement capacitors

04

Power & process plants

PF, filter, and surge capacitors

05

Legacy / obsolete units

Replacements for discontinued imported capacitors

06

Long-lead-time imports

Domestic supply where import lead times are prohibitive

Available in

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.

Match Dimensional match Built to the physical envelope of the original unit.
Match Electrical match Rating matched to the original specification.
Basis From a sample Developed from a physical sample.
Basis From a nameplate / spec Developed from documentation alone.
Platform Full range Any construction across the Marxelec product line.
Container Metal / insulated Per the original's form factor.

Tested per unit · before despatch

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.

01

Capacitance & dissipation factor

Verified against the target specification.

02

Voltage withstand

Withstand test per the target rating [TBC].

03

Application-specific test

E.g. life test (ESC), impulse (surge), cooling test (water-cooled) - per the family being matched.

04

Dimensional

Verified against the original envelope.

05

Insulation resistance

IR at rated voltage.

Pairs with · also looked at

Related products.

Most deployments include one or more of the following. Browse alongside.

Start an enquiry

Tell engineering
what you are building.

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.

DIRECT CONTACT

Marxelec Energy Pvt. Ltd.
Plot No. L-49, MIDC Kupwad
Sangli Miraj Kupwad
Sangli, Maharashtra 416436
India

response@marxelec.com
+91 91686 18452