AC-Filter capacitors are used in power electronic equipment like UPS, Motor Drives, Inverters or Battery Chargers in order to absorb the harmonic current generated in the different power conversion stages. Film dielectric has the best performance in term of safety thanks to its self-healing property particularly important in AC application. The new C4AF series, available in 250Vac,310Vac and 400Vac voltage ratings, combines strong performances in current thanks to the low dissipation along with a heavy-duty characterization, being able to withstand 85°C / 85% RH test at rated voltage.

1. WEB SEMINAR
C4AF - AC Filtering Power Box Film capacitor
C4AQ - DC Link Box Film capacitor
July 2018

2. Agenda
1. C4AF series for AC Filtering
❑ PCB Applications
❑ Industrial
❑ Automotive
2. C4AQ series DC-Link Box Film capacitor
❑ PCB application
❑ Industrial
❑ Automotive

3. Agenda
1. C4AF series for AC Filtering
❑ PCB Applications
❑ Industrial
❑ Automotive

4. C4AF series - AC Filtering
Overview
The C4AF is a polypropylene metallized film with a rectangular plastic box-type design (white or grey color),
filled with resin and 2 or 4 tinned copper wires.
Applications
Typical applications include AC filtering in harsh environmental conditions (automotive grade) in
Alternative energy, Industrial and Automotive.
Features & Benefits
• Rated voltage: 250 – 400 VAC
• Capacitance range: 1.0 – 62.0 μF
• Lead spacing: 27.5 – 52.5 mm
• Capacitance tolerance: ±5%, ±10%
• Endurance test: – 500 + 500 hours @ 1.25 x Vr AC @ 85°C
– 500 + 500 hours @ 1.25 x VOP105 AC @ 105°C
• Max. operating temperature TMAX: +105°C
• Climatic category: 55/105/56 IEC 60068-1
• Biased Humidity test: 85°C, 85% RH, 240 VAC/310 VAC, 500 hours
• Automotive Grade AEC–Q200

5. C4AF series - Electrical characteristics table
Temperature Range -55°C to +105°C
Qualifications AEC-Q200
Dissipation Factor PP Maximum (tgδ0) ≤ 0.0007 at +25°C ±5°C
Surge voltage 1.5 * VNDC for maximum 10 times in life time at 25°C ±5°C
Overvoltage
(IEC 61071)
1.15 * VNDC for maximum 30 minutes - once per day
1.3 * VNDC for maximum 1 minute - once per day
Peak non Repetitive Current 1.5 * IPKR - maximum 1,000 times in life time
Insulation Resistance IR x C ≥ 30.000 seconds at 100 VDC 1 minute (+25°C ±5°C)
Capacitance deviation in the operating
temperature range -55°C to +105°C
±2% maximum on capacitance value measured at +25°C ±5°C
Test Voltage between terminations 1.5 * UNDC for 10s or 1.65 * UNDC for 2s @ +25°C ±5°C
Permissible Relative Humidity - Storage
Annual average ≤ 70%; 85% on 30 days/year randomly
distributed throughout the year. Dewing not admissible
Rated Voltage (VAC) @ 85°C 250 310 350 400
Operating Voltage (VAC) @ 105°C 175 217 245 280

6. C4AF series - Size /Capacitance / Voltage tables
C4AF Case Size Voltage (VAC) 85°C
(B x H x L – p) [mm] 250 310 350 400
11 x 20 x 31.5 – 27.5 1.0 – 1.5 µF 1.0 µF
13 x 25 x 31.5 – 27.5 2.2 µF 1.5 µF 1.0 µF
14 x 28 x 31.5 – 27.5 2.2 µF 1.5 µF 1.0 µF
19 x 29 x 31.5 – 27.5 3.3 – 4.7 µF 3.3 µF 2.28 µF 1.5 µF
22 x 37 x 31.5 – 27.5 6.8 – 7.5 µF 4.7 µF 3.3 – 3.7 µF 2.2 – 2.5 µF
20 x 40 x 42 – 37.5 10 µF 6.8 µF 4.7 µF 3.3 µF
28 x 37 x 42 – 37.5 10 µF 6.8 µF 4.7 µF
30 x 45 x 42 – 37.5 15 µF 6.8 µF
35 x 50 x 42 – 37.5 22 – 24.5 µF 15 – 17 µF 10 – 12.5 µF 9.0 µF
30 x 45 x 57.5 – 52.5 10 µF
35 x 50 x 57.5 – 52.5 33 µF 22 µF 15 µF
45 x 56 x 57.5 - 52.5 47 - 55 µF 33 – 37.5 µF 22 – 27 µF 15 – 20 µF
45 x 65 x 57.5 - 52.5 62 µF 42 µF 32 µF 22.5 µF
Items in red – available from November 2018

7. C4AF series
Life expectancy / Failure Quota vs. Hot-Spot temperature, Voltage derating
Life expectancy &
Failure Quota are a
function of:
❑ Hot-Spot temperature
❑ Voltage

8. C4AQ Series - Data for Hot Spot Temperature calculation

9. C4AF series
Power Losses & Hot Spot Temperature Calculation
Calculation of the Hot Spot Temperature: Dielectric Power Losses

10. C4AF series
Power Losses & Hot Spot Temperature Calculation
Calculation of the Hot Spot Temperature: Joule Power Losses

11. C4AF series
Power Losses & Hot Spot Temperature Calculation
Calculation of the Hot Spot Temperature: Total Power Losses

12. C4AF series
Power Losses & Hot Spot Temperature Calculation
Example of Power Calculation : C4AF series 10µF / 310 VAC

13. C4AF series
Typical Biased Humidity Test trend

14. AC Filtering Power Film Capacitors Applications
• Solar/Wind Converters
• UPS
• Welding machines
• Ventilation systems
• Automotive systems
Positions (for examples):
1. C4AF
2. C4AQ
3. C4AF

15. C4AF series Cross reference
Function
KEMET
Series
TDK/EPCOS Vishay Faratronic HJC Wima
AC
Harmonic
Filtering
C4AF B32754…B32758
MKP1847
C6A MPBF MKP 4F
MKP1847HC

16. C4AF series for AC Filtering
Questions ?

17. Agenda
2. C4AQ series DC-Link Box Film capacitor
❑ PCB application
❑ Industrial
❑ Automotive

18. C4AQ series DC-Link filtering
Overview
The C4AQ is a polypropylene metallized film with a rectangular plastic box-type design filled with resin and 2
or 4 tinned copper wires.
Applications
Typical applications include DC-Link filtering in harsh environmental conditions (automotive grade) in
Alternative energy, Industrial and Automotive.
Features & Benefits
• Rated voltage: 500 – 1500 VDC
• Capacitance range: 1 – 210 μF
• Lead spacing: 27.5 – 52.5 mm
• Capacitance tolerance: ± 5%, ± 10%
• Max. operating temperature TMAX: +105°C
• Climatic category: 55/105/56 IEC 60068-1
• Biased Humidity test: 85°C, 85% RH, 240 VAC/310 VAC, 500 hours
• Automotive Grade AEC–Q200
• Long life expectancy > 100 000 hours
• Biased humidity test 60°C / RH 95% / Vndc / 1000 hours

19. C4AQ series - DC Link Film Capacitors Applications
Industrial & Automotive
• Motor Drives
• Inverters
• Welding machines
• Rectifiers
• SMPS
• Solar/Wind Converters
• Ventilation systems
• Electric Vehicle
Charging Stations
• On Board Battery
Chargers

20. C4AQ series - Electrical characteristics Tables
Rated voltage VR 500 – 1,500 VDC
Capacitance range 1.0 µF to 210.0 µF
Capacitance Tolerance ±5%, ±10%
Temperature Range 55/105/56 IEC 60068
Dissipation Factor PP typical (tgδ0) ≤ 0.0002 at 10 kHz and +25°C (±5°C)
Surge voltage 1.5 * VNDC for maximum 10 times in life time at 25°C
Overvoltage IEC 61071
1.15 * VNDC for maximum 30 minutes - once per day
1.3 * VNDC for maximum 1 minute - once per day
Peak non Repetitive Current 1.5 * IPKR - maximum 1,000 times in life time
Insulation Resistance IR x C ≥ 30.000 seconds at 100 VDC 1 minute (+25°C)
Capacitance deviation in operation ±2% maximum on capacitance value measured at (+25°C)
Test Voltage between terminations 1.5 * UNDC for 10s or 1.65 * UNDC for 2s @ +25°C.
Permissible Relative Humidity - Storage
Annual average ≤ 70%; 85% on 30 days/year randomly distributed throughout the
year. Dewing not admissible

21. C4AQ series – Size /Capacitance / Voltage Tables
C4AQ Case Size Voltage (VDC) 70°C
(B x H x L – p) [mm] 500 650 800 1100 1300 1500
11 x 20 x 31.5 – 27.5 5.6 µF 3.3 µF 2.7 µF 1.5 µF 1 µF 1 µF
13 x 25 x 31.5 – 27.5 10 µF 5.6 µF 4 µF 2.7 µF 1.8 µF 1.5 µF
14 x 28 x 31.5 – 27.5 12.5 7 µF 5 µF 3.3 µF 2.2 µF 2 µF
19 x 29 x 31.5 – 27.5 15 µF 10 µF 8 µF 5 µF 3.3 µF 3 µF
22 x 37 x 31.5 – 27.5 25 µF 15 µF 12.5 µF 8 µF 5 µF 4.5 µF
20 x 40 x 42 – 37.5 40 µF 20 µF 15 µF 12 µF 8 µF 6 µF
28 x 37 x 42 – 37.5 50 µF 30 µF 20 µF 14 µF 10 µF 8 µF
30 x 45 x 42 – 37.5 70 µF 40 µF 30 µF 20 µF 12 µF 12 µF
35 x 50 x 42 – 37.5 90 µF 50 µF 40 µF 25 µF 18 µF 15 µF
30 x 45 x 57.5 – 52.5 100 µF 55 µF 45 µF 30 µF 20 µF 17 µF
35 x 50 x 57.5 – 52.5 130 µF 75 µF 55 µF – 60 µF 40 µF 25 µF – 27 µF 22 µF
45 x 56 x 57.5 - 52.5 170 µF 110 µF 85 µF 55 µF 38 µF 32 µF
45 x 65 x 57.5 - 52.5 210 µF 130 µF 100 µF 65 µF 45 µF 40 µF
Life expectancy (hrs) Vdc
100.000 Rated Voltage (VDC) @ 70°C Ths 500 650 800 1100 1300 1500
100.000 Operative Voltage (VDC) @ 85°C Ths 450 600 700 900 1100 1200
10.000 Operative Voltage (VDC) @ 105°C Ths 350 450 550 700 850 900
Items in red - available from November 2018

22. C4AQ series - Design in for the required expected life
1. Input data: Capacitance, Working Voltage, Irms, Ambient Temp, Expected life
2. Data from catalogue: ESR, Rth according to Capacitance and as a safety choice rated voltage ≥ Working voltage
3. Hot spot calculation
4. Component expected life using datasheet graphs

23. C4AQ series DC-Link Applications
Hot spot calculation
Hot spot calculation:
The hot spot is the internal point of the capacitor where the temperature reaches maximum value.
Rth and ESR are listed in the catalogue as a function of cap and Rated Voltage
𝑃 𝐷 = 𝐼𝑟𝑚𝑠2
∗ 𝐸𝑆𝑅
Δ 𝑇 𝐴𝑚𝑏 − 𝐻𝑆 = 𝑃 𝐷 ∗ 𝑅𝑡ℎ
𝑇 𝐻𝑆 = T 𝑎𝑚𝑏 + 𝑅𝑡ℎ * (𝐼𝑟𝑚𝑠2
∗ 𝐸𝑆𝑅)
In DC-Link capacitors the ESR is constant in the range 2KHz – 50KHz,
We can simply consider the total Irms instead of the harmonic composition
• Rth = Thermal resistance
• PD = Power dissipated
• ESR = Equivalent Series Resistance @ 10KHz
Input data: Irms, T 𝑎𝑚𝑏
Catalogue data: 𝑅𝑡ℎ , 𝐸𝑆𝑅
Output data: 𝑇 𝐻𝑆
𝑇 𝐻𝑆 = T 𝑎𝑚𝑏 + Δ 𝑇 𝐴𝑚𝑏 − 𝐻𝑆
Typical trend

24. C4AQ Series - Data for Hot Spot Calculation

25. C4AQ series DC-Link Applications
Life Expectancy
Life calculation example:
Hotspot = 85°C
Working voltage 810Vdc,
Rated Voltage 1100Vdc (select the graph)
Lifetime expectancy requested → > 100.000 hours
Step 3) Output lifetime expectancy
Step 2) Select the Voltage
Step 1) Select 85°C Hotspot curve
The value of Lifetime Expectancy
is higher than 100k hours
>100.000 hours

26. C4AQ series - Cross reference
Function Series TDK/EPCOS Vishay Faratronic HJC Wima
DC-Link C4AQ
B32674...B32678 MKP1848 C3D
EPB DC-LINK MKP 4
B32774...B32778 MKP1848C C3D(R)
B32774H...B32778H MKP1848S

27. C4AQ series DC-Link Applications
Questions ?

28. Thank you
Frank Lipski
FEBG Product manager
+49 162 245 1667
franklipski@kemet.com
KEMET Electronics GmbH
Hermann-Köhl-Strasse 2
86899 Landsberg am Lech
Germany
www.kemet.com
Andrea Tesi
FEBG Product manager
+49 8191 3350-718
andreatesi@kemet.com