X and Y Capacitors. Copyright 2008 KEMET
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1 X and Y Capacitors
2 X Capacitors
3 Two Major Types: X2 and X1 X2 capacitors Agency tested with 2,500 volt surge test. Satisfies 99% of the applications. X1 capacitors Agency tested with 4,000 volt surge test. Only used if the safety agency tells the designer it is necessary. May be used in X2 applications.
4 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Met. Impregnated Paper PME271M
5 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Met. Impregnated Paper PME271M
6 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Meets agency requirements. Met. Impregnated Paper PME271M Greater surge withstand capability.
7 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Meets agency requirements. Stable. Met. Impregnated Paper PME271M Greater surge withstand capability. Stable.
8 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Meets agency requirements. Stable. Good self healing. Failure mode is open circuit. Met. Impregnated Paper PME271M Greater surge withstand capability. Stable. Excellent self healing. Failure mode is open circuit.
9 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Meets agency requirements. Stable. Good self healing. Failure mode is open circuit. Good flame resistance. Met. Impregnated Paper PME271M Greater surge withstand capability. Stable. Excellent self healing. Failure mode is open circuit. Excellent flame resistance.
10 X Capacitor Comparison Choosing between film and paper caps Metallized Film R46 & PHE840M Less expensive. Meets agency requirements. Stable. Good self healing. Failure mode is open circuit. Good flame resistance. Smaller, up to 10µF. Met. Impregnated Paper PME271M Greater surge withstand capability. Stable. Excellent self healing. Failure mode is open circuit. Excellent flame resistance. Available up to 0.6µF.
11 R46 & PHE840M Features Benefits for the designer
12 R46 & PHE840M Features Benefits for the designer Competitive prices, small sizes.
13 R46 & PHE840M Features Benefits for the designer Competitive prices, small sizes. Many values in standard leadspacings plus new smaller alternates. 1µF in 27.5mm and new µf in 37.5mm and new 27.5.
14 R46 & PHE840M Features Benefits for the designer Competitive prices, small sizes. Many values in standard leadspacings plus new smaller alternates. 1µF in 27.5mm and new µf in 37.5mm and new Max. C-value is 10µF for high power SMPS. Eliminates the need for 2 capacitors in parallel.
15 R46 & PHE840M Features Benefits for the designer Competitive prices, small sizes. Many values in standard leadspacings plus new smaller alternates. 1µF in 27.5mm and new µf in 37.5mm and new Max. C-value is 10µF for high power SMPS. Eliminates the need for 2 capacitors in parallel. PHE840M UL approved at 280VAC. Eases design-ins for 277VAC applications.
16 R46 & PHE840M Features Benefits for the designer Competitive prices, small sizes. Many values in standard leadspacings plus new smaller alternates. 1µF in 27.5mm and new µf in 37.5mm and new Max. C-value is 10µF for high power SMPS. Eliminates the need for 2 capacitors in parallel. PHE840M UL approved at 280VAC. Eases design-ins for 277VAC applications. Low loss polypropylene design for high frequency applications. (Polyester caps can heat up too much.) High frequency motor drives, aircraft power (400Hz).
17 A Product for Every Voltage X caps for industrial applications AC voltage Film Paper 275/280 R46, PHE840M PME271M 300 R46, PHE840E PME271E 330 PHE841, R49 440/480 PHE844, R47 PME & up PHE845 PME264 Use one capacitor of the correct voltage instead of two low-voltage parts in series.
18 Y Capacitors
19 Two Major Types: Y2 and Y1 Y2 capacitors Agency tested with 5,000 volt surge test. Satisfies nearly all the applications. Y1 capacitors Agency tested with 8,000 volt surge test. Double insulation / reinforced insulation. Only used if the safety agency tells the designer it is necessary. Because common Y cap C-values are small (for example 4700pF) ceramics are also offered.
20 IEC950 Push Test Effect on ceramic Y capacitors 10N 10N Ceramic Y Capacitor Boxed Y Capacitor
21 Ceramic Y Capacitor Solutions to the Push Test Problem Put an insulating sleeve over the capacitor. Adds to the total cost.
22 Ceramic Y Capacitor Solutions to the Push Test Problem Put an insulating sleeve over the capacitor. Adds to the total cost. Leave a keepout zone on the power supply. Creates a size penalty.
23 Y Capacitor Comparison Ceramic Metallized paper & film
24 Y Capacitor Comparison Ceramic Less expensive. Metallized paper & film
25 Y Capacitor Comparison Ceramic Less expensive. Unstable over time and temperature. Metallized paper & film Stable.
26 Y Capacitor Comparison Ceramic Less expensive. Unstable over time and temperature. Pushes over (may require additional insulation). Metallized paper & film Stable. Boxed types do not push over. (Lower total cost.)
27 Y Capacitor Comparison Ceramic Less expensive. Unstable over time and temperature. Pushes over (may require additional insulation). Maximum capacitance available is ~0.022µF. Metallized paper & film Stable. Boxed types do not push over. (Lower total cost.) Available up to 1.0µF. (Ideal for industrial apps.)
28 Y Capacitor Comparison Ceramic Less expensive. Unstable over time and temperature. Pushes over (may require additional insulation). Maximum capacitance available is ~0.022µF. Failure mode tends toward short circuit. Metallized paper & film Stable. Boxed types do not push over. (Lower total cost.) Available up to 1.0µF. (Ideal for industrial apps.) Self healing. Failure mode is open circuit.
29 NEW! New film Y cap PHE850 Alternative to ceramics
30 NEW! New film Y cap PHE850 Alternative to ceramics Metallized, self-healing construction. Safer failure mode at near-ceramic prices.
31 NEW! New film Y cap PHE850 Alternative to ceramics Metallized, self-healing construction. Safer failure mode at near-ceramic prices. Very wide C-value range: µF. Higher values excellent for industrial applications.
32 NEW! New film Y cap PHE850 Alternative to ceramics Metallized, self-healing construction. Safer failure mode at near-ceramic prices. Very wide C-value range: µF. Higher values excellent for industrial applications. Small physical size.
33 NEW! New film Y cap PHE850 Alternative to ceramics Metallized, self-healing construction. Safer failure mode at near-ceramic prices. Very wide C-value range: µF. Higher values excellent for industrial applications. Small physical size. Does not push over. Can lower total cost to use.
34 Summary Choosing X and Y Capacitors Y Capacitors X Capacitors
35 Summary Choosing X and Y Capacitors Y Capacitors Use metallized paper PME271Y for commercial & industrial applications. Provides excellent self-healing and flammability performance. X Capacitors
36 Summary Choosing X and Y Capacitors Y Capacitors Use metallized paper PME271Y for commercial & industrial applications. Provides excellent self-healing and flammability performance. Use metallized film (series PHE850 or R41) as an alternative to ceramics in consumer or low-cost applications. Low cost like ceramics but selfhealing and does not push over. X Capacitors
37 Summary Choosing X and Y Capacitors Y Capacitors Use metallized paper PME271Y for commercial & industrial applications. Provides excellent self-healing and flammability performance. X Capacitors Use metallized film R46 or PHE840M for most applications. Use metallized film (series PHE850 or R41) as an alternative to ceramics in consumer or low-cost applications. Low cost like ceramics but selfhealing and does not push over.
38 Summary Choosing X and Y Capacitors Y Capacitors Use metallized paper PME271Y for commercial & industrial applications. Provides excellent self-healing and flammability performance. Use metallized film (series PHE850 or R41) as an alternative to ceramics in consumer or low-cost applications. Low cost like ceramics but selfhealing and does not push over. X Capacitors Use metallized film R46 or PHE840M for most applications. Check out higher voltage parts where applicable.
39 Summary Choosing X and Y Capacitors Y Capacitors Use metallized paper PME271Y for commercial & industrial applications. Provides excellent self-healing and flammability performance. Use metallized film (series PHE850 or R41) as an alternative to ceramics in consumer or low-cost applications. Low cost like ceramics but selfhealing and does not push over. X Capacitors Use metallized film R46 or PHE840M for most applications. Check out higher voltage parts where applicable. Use metallized paper (series PMExxx) in high-rel applications such as critical industrial and telecom infrastructure applications.
40
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