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Please read Cautions and warnings and

Important notes at the end of this document.

EMI suppression capacitors (MKP)

B32032 ... B32036

Y2 / 350 V AC

Design of our capacitors

Our EMI capacitors use polypropylene (PP) film metalized with a thin layer of Zinc (Zn). The follow-

ing key points have made this design suitable to IEC/UL testing, holding a minimum size.



Overvoltage AC capability with very high temperature Endurance test of IEC 60384-14:2013

(4th edition) / UL 60384-14:2014 (2nd edition) must be performed at 1.25 × VR at maximum tem-

perature, during 1000 hours, with a capacitance drift less than 10%.



Higher breakdown voltage withstanding if compared to other film metallizations, like Aluminum.

IEC 60384-14:2013 (4th edition) / UL 60384-14:2014 (2nd edition) establishes high voltage tests

performed at 4.3 × VR – 1 minute, impulse testing at 2500 V for C = 1 µF and active flammability

tests.



Damp heat steady state: 40 °C/ 93% RH / 56 days. (without voltage or current load)

Effect of humidity on capacitance stability

Long contact of a film capacitor with humidity can produce irreversible effects. Direct contact with

liquid water or excess exposure to high ambient humidity or dew will eventually remove the film

metallization and thus destroy the capacitor. Plastic boxed capacitors must be properly tested in the

final application at the worst expected conditions of temperature and humidity in order to check if

any parameter drift may provoke a circuit malfunction.

In case of penetration of humidity through the film, the layer of Zinc can be degraded, specially

under AC operation (change of polarity), accelerated by the temperature, provoking an increment

of the serial resistance of the electrode and eventually a reduction of the capacitance value.

For DC operation, the parameter drift is much less.

Plastic boxes and resins can not protect 100% against humidity. Metal enclosures, resin potting or

coatings or similar measures by customers in their applications will offer additional protection

against humidity penetration.

Display of ordering codes for TDK Electronics products

The ordering code for one and the same product can be represented differently in data sheets, data

books, other publications, on the company website, or in order-related documents such as shipping

notes, order confirmations and product labels. The varying representations of the ordering codes

are due to different processes employed and do not affect the specifications of the respective pro-

ducts.

Detailed information can be found on the Internet under www.tdk-electronics.tdk.com/orderingcodes.

Correlation of data sheet values and modelling tool outputs

Data sheet values and results of design tools may deviate as they have not been derived in the

same context.

While data sheets show individual parameter statements without considering a possible dependency

to other parameters. Tools model a complete given scenario as input and processed inside the tool.

Furthermore as we constantly strive to improve our models, the results of tools can change over

time and be a non-binding indication only.