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© KEMET Electronics Corporation. All Rights Reserved.
Ceramic Safety Capacitors
Avoiding the Confusion
© KEMET Electronics Corporation. All Rights Reserved.
Outline
• What are safety capacitors?
• Certification and Classification
• Lead Styles
• KEMET Ceramics Offering
• Key Takeaways
© KEMET Electronics Corporation. All Rights Reserved.
Outline
• What are safety capacitors?
• Certification and Classification
• Lead Styles
• KEMET Ceramics Offering
• Key Takeaways
© KEMET Electronics Corporation. All Rights Reserved.
Primary Function?
© KEMET Electronics Corporation. All Rights Reserved.
Devices Need Power
© KEMET Electronics Corporation. All Rights Reserved.
Home Dryer Example
Ideal Scenario
240VAC
Time (s)
Voltage
© KEMET Electronics Corporation. All Rights Reserved.
Home Dryer Example
Real Scenario
Lightning Strike
240VAC
Time (s)
Voltage
© KEMET Electronics Corporation. All Rights Reserved.
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
Class X Capacitors
Line to Neutral
Line to Line
Class Y Capacitors
Line to Ground
© KEMET Electronics Corporation. All Rights Reserved.
What happens if X or Y capacitor fails?
Blow fuse or fire Electric Shock
Class X Capacitors Class Y Capacitors
© KEMET Electronics Corporation. All Rights Reserved.
Defining Safety Capacitors
✓
Line to Line
Line to Ground
X / Y
© KEMET Electronics Corporation. All Rights Reserved.
Outline
• What are safety capacitors?
• Certification and Classification
• Lead Styles
• KEMET Ceramics Offering
• Key Takeaways
© KEMET Electronics Corporation. All Rights Reserved.
Safety Certifications
IEC 60384-14
UL 60384-14
© KEMET Electronics Corporation. All Rights Reserved.
Safety Certifications
Purpose of IEC 60384-14?
© KEMET Electronics Corporation. All Rights Reserved.
Safety Certifications
The Process
VDE IMQ TUV DEMKO
IEC 60384-14
FIMKO
Main Specification
Certification Body
Individual Certification
Body Mark
Harmonized Certification Mark
UL 60384-14
UL
=
© KEMET Electronics Corporation. All Rights Reserved.
Safety Certifications
✓ Proper markings per 60384-14
✓ Up-to-date license (certificate) available
© KEMET Electronics Corporation. All Rights Reserved.
Sub Classification
Per IEC 60384-14
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
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
Example → X1 400 VAC / Y2 250 VAC
© KEMET Electronics Corporation. All Rights Reserved.
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
X1
© KEMET Electronics Corporation. All Rights Reserved.
Outline
• What are safety capacitors?
• Certification and Classification
• Lead Styles
• KEMET Ceramics Offering
• Key Takeaways
© KEMET Electronics Corporation. All Rights Reserved.
Lead Styles
Straight Outside
Kink
Inside
Kink
Vertical / Inline
Kink
© KEMET Electronics Corporation. All Rights Reserved.
Lead Styles
Straight
Outside
Kink
Inside
Kink
Vertical / Inline
Kink
PCB Board
© KEMET Electronics Corporation. All Rights Reserved.
Lead Styles
Outside vs Inside Kink
Outside
Kink
Inside
Kink
d
d
Space Issues Clearance Issues
© KEMET Electronics Corporation. All Rights Reserved.
Lead Styles
Straight vs Vertical / Inline Kink
Straight Vertical / Inline
Kink
d
Side View Side View
Top View Top View
© KEMET Electronics Corporation. All Rights Reserved.
Construction
© KEMET Electronics Corporation. All Rights Reserved.
Outline
• What are safety capacitors?
• Classification and Certification
• Lead Styles
• KEMET Ceramics Offering
• Key Takeaways
© KEMET Electronics Corporation. All Rights Reserved.
sdf
HIGH VOLTAGE
C900 Safety Disc
Safety SMD
ER Safety Disc
Class and Voltage Ratings:
• 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
Class and Voltage Ratings
• X1 250 VAC / Y2 250 VAC
• X2 250 VAC
• Up to 5 kV Pulse Capable
• Industrial Grade
Case Sizes:
• 1808-2225
Lead Styles:
• Straight
• Outside
• Vertical
Class and Voltage Ratings:
• X1 440 VAC / Y2 250 VAC
• X1 440 VAC / Y2 300 VAC
• X1 760 VAC / Y1 500 VAC
Lead Styles:
• Straight
• Outside
• Vertical
AC, AS, AH ERO, ERK, ERP
KJ Safety Disc
Class and Voltage Ratings:
• X1 440 VAC / Y1 400 VAC
• X1 400 VAC / Y1 250 VAC
Lead Styles:
• Straight
• Outside
• Vertical
KJN, KJY
COMING
SOON
© KEMET Electronics Corporation. All Rights Reserved.
Key Takeaways
• Interference suppression
• Certified to IEC-60384-14 specification
• Marking and Certificate
• KEMET offers both X and Y safety capacitors with a variety of lead styles
• Be on the look-out for Safety SMD
© KEMET Electronics Corporation. All Rights Reserved.
Thank You!!!
Mark R. Laps
Technical Product Manager
Ceramic Business Group
KEMET Electronics
Cell Phone: +1-864-399-4879
Office Phone: +1-864-963-6383
www.kemet.com | marklaps@kemet.com

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KEMET Webinar - Ceramic Safety Capacitors, Avoiding the Confusion

  • 1. © KEMET Electronics Corporation. All Rights Reserved. Ceramic Safety Capacitors Avoiding the Confusion
  • 2. © KEMET Electronics Corporation. All Rights Reserved. Outline • What are safety capacitors? • Certification and Classification • Lead Styles • KEMET Ceramics Offering • Key Takeaways
  • 3. © KEMET Electronics Corporation. All Rights Reserved. Outline • What are safety capacitors? • Certification and Classification • Lead Styles • KEMET Ceramics Offering • Key Takeaways
  • 4. © KEMET Electronics Corporation. All Rights Reserved. Primary Function?
  • 5. © KEMET Electronics Corporation. All Rights Reserved. Devices Need Power
  • 6. © KEMET Electronics Corporation. All Rights Reserved. Home Dryer Example Ideal Scenario 240VAC Time (s) Voltage
  • 7. © KEMET Electronics Corporation. All Rights Reserved. Home Dryer Example Real Scenario Lightning Strike 240VAC Time (s) Voltage
  • 8. © KEMET Electronics Corporation. All Rights Reserved. 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 Class X Capacitors Line to Neutral Line to Line Class Y Capacitors Line to Ground
  • 9. © KEMET Electronics Corporation. All Rights Reserved. What happens if X or Y capacitor fails? Blow fuse or fire Electric Shock Class X Capacitors Class Y Capacitors
  • 10. © KEMET Electronics Corporation. All Rights Reserved. Defining Safety Capacitors ✓ Line to Line Line to Ground X / Y
  • 11. © KEMET Electronics Corporation. All Rights Reserved. Outline • What are safety capacitors? • Certification and Classification • Lead Styles • KEMET Ceramics Offering • Key Takeaways
  • 12. © KEMET Electronics Corporation. All Rights Reserved. Safety Certifications IEC 60384-14 UL 60384-14
  • 13. © KEMET Electronics Corporation. All Rights Reserved. Safety Certifications Purpose of IEC 60384-14?
  • 14. © KEMET Electronics Corporation. All Rights Reserved. Safety Certifications The Process VDE IMQ TUV DEMKO IEC 60384-14 FIMKO Main Specification Certification Body Individual Certification Body Mark Harmonized Certification Mark UL 60384-14 UL =
  • 15. © KEMET Electronics Corporation. All Rights Reserved. Safety Certifications ✓ Proper markings per 60384-14 ✓ Up-to-date license (certificate) available
  • 16. © KEMET Electronics Corporation. All Rights Reserved. Sub Classification Per IEC 60384-14 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 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 Example → X1 400 VAC / Y2 250 VAC
  • 17. © KEMET Electronics Corporation. All Rights Reserved. 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 X1
  • 18. © KEMET Electronics Corporation. All Rights Reserved. Outline • What are safety capacitors? • Certification and Classification • Lead Styles • KEMET Ceramics Offering • Key Takeaways
  • 19. © KEMET Electronics Corporation. All Rights Reserved. Lead Styles Straight Outside Kink Inside Kink Vertical / Inline Kink
  • 20. © KEMET Electronics Corporation. All Rights Reserved. Lead Styles Straight Outside Kink Inside Kink Vertical / Inline Kink PCB Board
  • 21. © KEMET Electronics Corporation. All Rights Reserved. Lead Styles Outside vs Inside Kink Outside Kink Inside Kink d d Space Issues Clearance Issues
  • 22. © KEMET Electronics Corporation. All Rights Reserved. Lead Styles Straight vs Vertical / Inline Kink Straight Vertical / Inline Kink d Side View Side View Top View Top View
  • 23. © KEMET Electronics Corporation. All Rights Reserved. Construction
  • 24. © KEMET Electronics Corporation. All Rights Reserved. Outline • What are safety capacitors? • Classification and Certification • Lead Styles • KEMET Ceramics Offering • Key Takeaways
  • 25. © KEMET Electronics Corporation. All Rights Reserved. sdf HIGH VOLTAGE C900 Safety Disc Safety SMD ER Safety Disc Class and Voltage Ratings: • 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 Class and Voltage Ratings • X1 250 VAC / Y2 250 VAC • X2 250 VAC • Up to 5 kV Pulse Capable • Industrial Grade Case Sizes: • 1808-2225 Lead Styles: • Straight • Outside • Vertical Class and Voltage Ratings: • X1 440 VAC / Y2 250 VAC • X1 440 VAC / Y2 300 VAC • X1 760 VAC / Y1 500 VAC Lead Styles: • Straight • Outside • Vertical AC, AS, AH ERO, ERK, ERP KJ Safety Disc Class and Voltage Ratings: • X1 440 VAC / Y1 400 VAC • X1 400 VAC / Y1 250 VAC Lead Styles: • Straight • Outside • Vertical KJN, KJY COMING SOON
  • 26. © KEMET Electronics Corporation. All Rights Reserved. Key Takeaways • Interference suppression • Certified to IEC-60384-14 specification • Marking and Certificate • KEMET offers both X and Y safety capacitors with a variety of lead styles • Be on the look-out for Safety SMD
  • 27. © KEMET Electronics Corporation. All Rights Reserved. Thank You!!! Mark R. Laps Technical Product Manager Ceramic Business Group KEMET Electronics Cell Phone: +1-864-399-4879 Office Phone: +1-864-963-6383 www.kemet.com | marklaps@kemet.com