WIMA film capacitors and passive electronic components

WIMA industrial film capacitors: MKS, MKP, FKP pulse units, IGBT snubber modules, high-power DC-Link capacitors, and RFI suppression components.

WIMA MKS and MKP metallized polyester and polypropylene film capacitors

WIMA metallized film capacitors MKS and MKP are engineered for analog signal filtering, power decoupling, and resonant topologies. Vacuum-deposited thin aluminum electrodes provide self-healing properties that prevent component breakdown during transient electrical overstresses.

Series MKS 2, MKS 4, MKP 4, and MKP 10 with lead spacing steps from 5 to 37.5 mm
Capacitance range from 1000 pF up to 47 uF for operating voltages up to 2000 VDC
Extremely low dissipation factor and thermal capacitance stability in operation
Flame-retardant plastic shell filled with epoxy compound compliant with UL 94 V-0

WIMA FKP pulse-duty film foil and high-precision capacitors

WIMA FKP high-precision capacitors are developed for electronic circuits demanding steep voltage rise rates and substantial peak currents. Combined architectures pairing pure metal foil with metallized film reduce internal ohmic resistance and optimize energy transfer.

Series FKP 1, FKP 2, FKP 3, and FKP 4 tailored for high-frequency power converters
Steep pulse rise velocity handling steep transients up to 11 000 volts per microsec
Ultra-low parasitic inductance ensuring optimal performance in high-speed circuits
Robust peak pulse current capability with firm internal electrode contact bonds

WIMA Snubber MKP and FKP protective damping capacitor modules

WIMA Snubber capacitor modules are built to damp switching voltage spikes and safeguard IGBT modules and MOSFET semiconductor switches. Sturdy terminal tabs facilitate direct bolting onto transistor power terminals, eliminating wiring loops and stray inductance.

Snubber MKP and Snubber FKP variants with operating voltage ratings up to 3000 VDC
Eight standardized plate terminal geometries matching industrial IGBT module pads
Effective voltage spike suppression attenuating semiconductor switching stress
Superior vibration immunity and thermal cycling endurance for power converters

WIMA DC-LINK polypropylene capacitors for DC bus power inverters

WIMA DC-LINK polypropylene power capacitors are engineered for ripple attenuation and energy buffering in the DC link of frequency inverters. Serving as reliable replacements for electrolytic banks, they deliver extended operational life and elevated safety margins.

Series DCL-MKP 3, DCL-MKP 4, DCL-MKP 5, and DCL-MKP 6 with high volume efficiency
Exceptional capability to withstand severe continuous RMS ripple currents on DC bus
Self-healing polypropylene dielectric eliminating hazard of liquid electrolyte leak
Operational life rating exceeding 100 000 hours in motor drives and solar inverters

WIMA RFI electromagnetic interference suppression capacitors class X and Y

WIMA RFI noise suppression capacitors are designed to attenuate electromagnetic interference across industrial automation control cabinets. The components suppress both symmetrical and asymmetrical noise in mains power lines, shielding machinery from grid surges.

Series MP 3-X2, MP 3-X1, and MP 3-Y2 utilizing metallized paper for surge damping
Series MKP-X2, MKP-X1, and MKP-Y2 polypropylene units for stable line filtering
Full compliance with global safety standards including ENEC, UL, and CSA norms
Dependable dielectric isolation between AC line conductors and equipment earth

WIMA SMD film capacitors and miniature PCM 2.5 leaded components

WIMA surface-mount film capacitors and miniature leaded devices with 2.5 mm pitch provide high component density for industrial printed circuit boards. They combine the superior electrical stability of plastic films with compact dimensions needed in sensor electronics.

Package size codes 1812 through 6054 in SMD-PET, SMD-PEN, and SMD-PPS chemistries
Voltage ratings from 50 VDC up to 1000 VDC for high-density electronic assemblies
Miniature radial leaded units with 2.5 mm pin spacing and self-healing electrode
Complete absence of microphonic noise and piezoelectric distortion found in MLCC

Manufacturing legacy of WIMA and development of film capacitor technologies

The German company WIMA was founded in 1948 by Wilhelm Westermann in Unna. Over decades of research and process innovation, the enterprise expanded into an acknowledged global technology leader in plastic film dielectrics.

All WIMA products are manufactured exclusively at its modern German facilities situated in Mannheim, Berlin, Aurich, and Unna.

Refraining from relocating assembly lines to low-wage regions allowed WIMA to preserve uncompromising control over raw material purity, winding precision, and thin film metallization.

Today the brand supplies dependable passive electronic components to mechanical engineering, medical instrumentation, energy grids, and high-performance motor drives.

Physics of self-healing mechanisms in metallized film capacitors

The definitive operational benefit of WIMA metallized film capacitors is their immediate self-healing capability during transient dielectric flashovers.

In the MKS and MKP product lines, conducting electrodes consist of vacuum-deposited pure aluminum layers fractions of a micron thick, applied directly to the polymer dielectric substrate.

When an overvoltage transient occurs at a microscopic weakness point, an electric arc evaporates the ultra-thin aluminum layer around the affected spot in microseconds.

An insulating perimeter forms around the pinpoint defect without creating a short circuit, allowing the capacitor to maintain regular capacitance and insulation resistance.

Pulse current endurance and du/dt surge ratings in FKP foil series

In high-frequency resonant circuits and pulse power converters, conventional metallized designs can encounter thermal stress at the end-contact shooping layer.

For demanding regimes involving fast transients, WIMA manufactures the FKP series utilizing a hybrid architecture combining pure metal foil electrodes with metallized carrier films.

This design reduces internal connection resistance.

WIMA FKP 1 and FKP 4 capacitors easily withstand steep voltage rise gradients up to 11 000 volts per microsecond along with peak pulse currents reaching hundreds of amperes, preventing thermal delamination under harsh high-frequency switching conditions.

Snubber damping modules protecting high-power IGBT semiconductors

Switching heavy currents in frequency converters generates inductive voltage transients capable of puncturing semiconductor junctions.

The WIMA Snubber series is engineered for direct spike suppression across the terminals of IGBT modules and thyristors, attenuating dynamic losses and high-frequency noise on power busbars.

Snubber MKP and Snubber FKP capacitors incorporate tinned heavy copper plate terminals across versions A through H, configured for direct bolt-down attachment onto IGBT module power tabs.

This mounting topology minimizes parasitic loop inductance, directing transient switching energy straight into the low-loss capacitor dielectric body.

DC-Link bus filtering and replacement of electrolytic banks in inverters

In industrial variable frequency drives and solar power inverters, traditional wet electrolytic capacitors are widely superseded by WIMA DC-LINK polypropylene power units.

Polypropylene capacitors of series DCL-MKP 3, 4, 5, and 6 contain no liquid electrolyte, eliminating risks of burst venting, gradual dry-out, and catastrophic short-circuits.

WIMA DC-Link capacitors endure significantly higher continuous RMS ripple currents per volume compared to electrolytic alternatives and feature negligible equivalent series resistance (ESR).

Their operational lifespan exceeds 100 000 hours at rated temperatures, substantially enhancing overhaul intervals of drive assemblies.

Electromagnetic noise suppression with RFI line filters class X and Y

Compliance of industrial machinery with international electromagnetic compatibility directives necessitates attenuation of electrical noise on AC utility power lines.

The WIMA RFI portfolio encompasses Class X1 and X2 components (line-to-line) and Class Y1 and Y2 components (line-to-ground), evaluated according to EN 60384-14.

For rugged industrial environments, WIMA manufactures MP 3 series suppression capacitors based on metallized paper impregnated with epoxy resin.

The paper dielectric provides outstanding surge absorption against high-voltage mains spikes up to several kilovolts, delivering dependable noise attenuation without structural degradation.

WIMA and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of WIMA and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.