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    Film Capacitor Quiz Resource

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    Passive Component | Power Energy | Industrial Automation | Kemet Electronics | Return to Quiz

     

    Question 1: In a film capacitor, the anode and cathode are formed by metal foil or by metalizing the film material. The film is the capacitor's dielectric element. Power Film Capacitors

    Question 2: Vapor deposition "melts" metal vapor into the film material, creating an electrode layer. Capacitor Manufacturing (slide 7)

    Question 3: PLA is a type of plastic used for 3d printing and not suitable capacitors. Film & Metallization (slide 3)

    Question 4: Polypropylene is one of the most common materials used, with PET as an alternative.  Film & Metallization (slide 3)

    Question 5: Film capacitors have a unique capability to seal a shorted area of their dielectric, leading to what is known as "self-healing" property.  Film & Metallization (slide 3)

    Question 6: Capacitors rated with an X or Y rated are suited for EMI suppression applications. Electric Vehicle Application

    Question 7: X-rated capacitors are only rated for line-to-line connections. Y-rated capacitors can be used only for line to ground applications. Electric Vehicle Application

    Question 8: DC-Link capacitors provide smoothing in an inverter design. Inverters have an input and output stage, where the DC-Link temporarily stores energy as the voltage is converted from AC to DC or from AC to AC with a different frequency. Electric Vehicle Application

    Question 9: Unencapsulated surface mount capacitors do not have a plastic coating. They resemble large ceramic capacitors. Since they do not have a case, their physical size is relatively small, compared to other surface mount capacitors. Electric Vehicle Application

    Question 10: The resin type is a soft oil designed to fill the can. Aluminum Can Power Film Capacitors

    Question 11: Additionally, manufacturers like KEMET also need to know the ambient temperature to estimate the operational life of an industrial-grade film capacitor. C44P-R Product Presentation

    Question 12: Paper capacitors have better self-healing characteristics than other film capacitor dielectrics. Their metalization tends to be thicker, resulting in less risk of oxidation. Oxidation of the metalization layer contributes to capacitance loss. Filtering SMP253 Frequently Asked Questions

    Question 13: Y2-capacitors are designed to handle a large transient. Their rated voltage could be as high as 500 VAC. Filtering SMP253 Frequently Asked Questions

    Question 14: The Automotive Electronics Council’s Component Technical Committee publishes standards for automotive electronics. Q200 covers passive devices like capacitors, resistors, and inductors. Filtering F862-V054 Frequently Asked Questions or Stress Test Qualification for Passive Components, The Automotive Electronics Council

    Question 15: Pulse capacitors have a metalization pattern designed to support high energy density, high ripple currents, and very fast switching (dv/dt). Not all film capacitors are suitable for pulse applications. Pulse Capacitors Product Brief

    Question 16: Hi-Pot Test is a critical test for automotive-grade applications and in particular for Y-rated safety capacitors. R41T and F862 V054 Product Presentation - HN rev 1 02-24-2020

    Question 17: Class-X capacitors are designed for connection from line-to-ground. Class-Y capacitors are designed for connection from line-to-ground. However, you can use Class-Y in line-to-ground applications as well. R41T and F862 V054 Product Presentation - HN rev 1 02-24-2020 or Safety Film Product Brief

    Question 18: The F862 and F862-V054 are both rated for 310 Vac applications. Metallized Polypropylene Film EMI Suppression Capacitors for Harsh Environmental Conditions - F862, Class X2, 310 VAC (Automotive Grade)

    Question 19: The SMP253 is a metallized paper encapsulated paper capacitor with the paper layer impregnated by an epoxy material. Impregnated Metallized Paper EMI Suppression Capacitors SMP253, Class Y2, 250 VAC Surface Mount Device or Film safety capacitor Y2 series - SMP253  presentation

    Question 20: Paper Y2 SMD capacitors are self-healing, resistance to PCB flexing, and fail safe (open). Two trade-offs to keep in mind is that their max temperature is 115C and they tend to be slightly larger than a ceramic with the same capacitance rating. Film safety capacitor Y2 series - SMP253  presentation

    Question 21: There is an area called "margin" between where the active electrodes run and the terminal (lead wire or surface mount terminal) gets connected. It prevents shorts when the terminal is welded to the capacitor body. Film safety capacitor Y2 series - SMP253  presentation, Impregnated Metallized Paper EMI Suppression Capacitors SMP253, Class Y2, 250 VAC Surface Mount Device, or Capacitor Manufacturing

    Question 22:  "Stacked" capacitors get a better connection between the active electrode and the terminal, providing a higher peak-current handling capability. Capacitor Manufacturing

    Question 23: Y1-class capacitors require double insulation to get their rating. AC Applications

    Question 24: Aluminum is a common metal for metallizing DC film capacitors. Zinc may also be used, but can also be found in AC film capacitors. Metallization And Film

    Question 25: THB is a temperature and humidity test with voltage applied. Usually it is rated voltage of the capacitor for a specified amount of time. Power Conversion C44P-R + C44U-M + R75H + F862-V054 + SMP253