KEMET EMEA webinars 2017. Clearing up the confusion and providing insight on the details of ceramic safety capacitors.

1. Ceramic Safety Capacitors
Avoiding the Confusion
December 2017

2. Outline
• What are safety capacitors?
• Classification and Certification
• KEMET Ceramics Offering
• Key Takeaways

3. Outline
• What are safety capacitors?
• Classification and Certification
• KEMET Ceramics Offering
• Key Takeaways

4. What they are Not

5. Devices Need Power
240V
120V / 220V

6. Home Dryer Example
Ideal Scenario
240VAC
Time (s)
Voltage

7. Home Dryer Example
Real Scenario
Lightning Strike
240VAC
Time (s)
Voltage

8. How do we Reduce EMI on AC Line?
AC Line Filter
AC line filterLine/HOT
Neutral
Ground
Cx Cx Cx
Cy
Cy
Cy
Cy
Inductor

9. What happens if X or Y capacitor fails?
Cx
L
N
Application
CY
L
N
Application
Failure could result in
blown fuse or fire
Failure could result in
electric shock
Class X Capacitor (Line-to-Line)
Class Y Capacitor (Line-to-Ground)

10. Defining Safety Capacitors
Safe

X / Y
Filtering

11. Outline
• What are safety capacitors?
• Classification and Certification
• KEMET Ceramics Offering
• Key Takeaways

12. Sub Classification
Subclass Peak Impulse
Voltage in Service
Application Peak Impulse before
endurance test
X1 >2.5 kV
≤ 4.0 kV
High pulse application
(Industrial)
4 kV per C ≤ 1µF
4/√C kV per C >1µF
X2 ≤ 2.5 kV General purpose
(Home appliance)
2.5 kV per C ≤1µF
2.5/√C kV per C >1µF
X3 ≤ 1.2 kV General purpose None
Subclass Rated Voltage Type of Bridged
Insulation
Peak Impulse before
endurance test
Y1 ≤ 500 Vac Double insulation or
reinforced Insulation
(Industrial)
8 kV
Y2 ≥ 150 Vac
≤ 500 Vac
Basic insulation or
supplementary insulation
(Home appliance)
5 kV

13. Safety Certifications
60384-14
for US and Canada
UL 60384-14

14. Safety Certifications
Purpose of 60384-14?

15. Safety Certifications
60384-14
Testing is performed by recognized certification bodies, not necessarily the
manufacturer:
• Example: VDE, TUV, UL, FIMKO, IMQ
• Each certification body has the capability to
• Test and certify capacitors per the standard
• Define their marking for the capacitor
• Inspect manufacturers factory for compliance to the standard
• Certification of Safety Capacitors is the “evidence” of conforming to the standard
• Qualification packages are not needed for the customer

16. Safety Certifications
Certification Process
VDE IMQ TUV DEMKO
IEC 60384-14
FIMKO
Main Specification
Certification Body
Individual Certification
Body Mark
Harmonized Certification Mark

17. Safety Certifications
KEMET Markings
• All KEMET safety discs are marked either with ENEC and/or with the
certification body’s marking.
• Harmonization of the standards within Europe have allowed markings
by certification bodies to be equal in application
=
• Because UL is not harmonized with the European
standard, the UL marking for USA and CA is separate
• Some customers may “prefer” a VDE mark over TUV
mark due to its recognizability. Can be thought of as a
“brand”.

18. Substitution
Can you substitute one class with another?
Class Substitution1
X1 Y1 or Y2
X2 X1, Y1, or Y2
Y2 Y1
Y1 None
1Substitutions are of the same or higher voltage rating

19. Outline
• What are safety capacitors?
• Classification and Certification
• KEMET Ceramics Offering
• Key Takeaways

20. KEMET Offering
C900 Series
X1 400 VAC / Y2 250 VAC
X1 440 VAC / Y2 300 VAC
X1 760 VAC / Y1 500 VAC
X1 400 VAC / Y1 250 VAC
X1 400 VAC / Y1 400 VAC
Dielectrics NP0, SL, Y5P, Y5U, Y5V
Cap Range 10 pF – 10 nF
Lead Spacing 5.0mm, 7.5mm, 10mm
Certification UL, VDE, ENEC

21. KEMET Offering
ERO, ERK, ERP Series
X1 440 VAC / Y2 250 VAC
X1 440 VAC / Y2 300 VAC
X1 760 VAC / Y1 500 VAC
Dielectrics U2J, Y5S, Y5T, Y5U
Cap Range 33 pF – 12 nF
Lead Spacing
5.0mm, 7.5mm, 10mm,
12.5mm
Certification UL, VDE, ENEC

22. KEMET Offering
KJN, KJY Series
X1 440 VAC / Y1 400 VAC
X1 400 VAC / Y1 250 VAC
Dielectrics Y5P, Y5V, Y5U
Cap Range 100 pF – 10 nF
Lead Spacing
5.0mm, 7.5mm, 10mm,
12.5mm
Certification UL, TUV, ENEC

23. KEMET Offering
Lead Options
Straight
Vertical/In-Line Kink
Outside Kink
Inside Kink

24. Construction
1
2
3
4
5
Description Material
1 Insulation Coating Epoxy polymer
2 Dielectric Element Ceramic
3 Solder Tin-silver
4 Electrodes Ag
5 Lead wire Tinned copper clad steel wire
Single layer capacitor

25. Safety Standard Recognized
X1/Y2 and X2 Classifications
High Reliability / BME Technology
250 VAC Rated Voltage
Peak Impulse Voltage Capable up to 5KV
C0G and X7R Dielectrics
1808 – 2225 Case Sizes
SMD Safety Certified Capacitors
Under Development
Target Release: Q1 CY2018

26. Key Takeaways
• Interference suppression
• Certified to IEC-60384-14 specification
• KEMET offers both X and Y ceramic safety capacitors
• Multiple lead styles are available
• Be on the look-out for Safety SMD

27. More Information
http://www.kemet.com/Ceramic Interference Suppression Safety Certified Capacitors

28. Thank You!!!
Mark R. Laps
Technical Product Manager
Ceramic Business Unit
KEMET Electronics
Cell Phone: +1-864-399-4879
Office Phone: +1-864-963-6383
www.kemet.com | marklaps@kemet.com