OverviewAll product unitsProduct unitPassive ComponentsProduct groupCapacitorsProduct familyAluminum Electrolytic CapacitorsMounting StyleRadial THTProduct seriesWCAP-AT1H Aluminum Electrolytic Capacitors

WCAP-AT1H Aluminum Electrolytic Capacitors

Long Life +105 °C

Products

All
⌀ 5 mm
⌀ 6.3 mm
⌀ 8 mm
⌀ 10 mm
⌀ 13 mm
⌀ 16 mm
⌀ 18 mm
Order Code Data­sheet Simu­lation Downloads StatusCVR
(V (DC))
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
PackagingDesign Kit Samples
860241475018SPEC
3 files Active i| Production is active. Expected lifetime: >10 years.4.7 µF 450 8000 110 185 20 5 10 16 Ammopack
860240672001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.6.8 µF 50 5000 -40 °C up to +105 °C 75 3.4 10 2 5 11 Ammopack860241
860241478002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.6.8 µF 450 10000 -25 °C up to +105 °C 240 222.4 20 5 13 20 Ammopack
860240672002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 50 5000 -40 °C up to +105 °C 97 5 10 2 5 11 Ammopack860241
860240572001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 35 5000 -40 °C up to +105 °C 65 3.5 12 2 5 11 Ammopack
860241375002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 400 10000 -25 °C up to +105 °C 274 260 20 5 10 16 Ammopack860241
860241175001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 250 10000 -25 °C up to +105 °C 320 200 15 5 10 20 Ammopack860241
860241075003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 200 10000 -25 °C up to +105 °C 310 180 15 5 10 20 Ammopack
860240975001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 160 10000 -25 °C up to +105 °C 280 164 15 5 10 16 Ammopack
860241478003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.10 µF 450 10000 -25 °C up to +105 °C 390 280 20 5 13 20 Ammopack
860240472001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 25 5000 -40 °C up to +105 °C 100 5.5 14 2 5 11 Ammopack
860240572002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 35 5000 -40 °C up to +105 °C 125 7.7 12 2 5 11 Ammopack860241
860240673003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 50 5000 -40 °C up to +105 °C 130 11 10 2.5 6.3 11 Ammopack860241
860241378003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 400 10000 -25 °C up to +105 °C 557 452 20 5 13 20 Ammopack860241
860241178002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 250 10000 -25 °C up to +105 °C 490 320 15 5 13 20 Ammopack860241
860241075004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 200 10000 -25 °C up to +105 °C 470 276 15 5 10 20 Ammopack
860240975002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 160 10000 -25 °C up to +105 °C 450 240.8 15 5 10 20 Ammopack
860241175002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 250 10000 -25 °C up to +105 °C 420 320 15 5 10 20 Ammopack
860241478004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.22 µF 450 10000 -25 °C up to +105 °C 632 496 20 5 13 25 Ammopack
860240372001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 16 5000 -40 °C up to +105 °C 115 5.28 16 2 5 11 Ammopack
860240472002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 25 5000 -40 °C up to +105 °C 130 8.25 14 2 5 11 Ammopack
860240573003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 35 5000 -40 °C up to +105 °C 178 11.55 12 2.5 6.3 11 Ammopack860241
860240674004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 50 8000 -40 °C up to +105 °C 241 16.5 10 3.5 8 11.5 Ammopack860241
860241178003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 250 10000 -25 °C up to +105 °C 750 430 15 5 13 25 Ammopack860241
860241381004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 400 10000 -25 °C up to +105 °C 870 628 20 7.5 18 21 Ammopack860241
860241078005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 200 10000 -25 °C up to +105 °C 620 364 15 5 13 20 Ammopack
860240978003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 160 10000 -25 °C up to +105 °C 610 311.2 15 5 13 20 Ammopack
860241481006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.33 µF 450 10000 -25 °C up to +105 °C 883 694 20 7.5 18 21 Ammopack
860240372002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 16 5000 -40 °C up to +105 °C 145 7.52 16 2 5 11 Ammopack
860240272001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 10 5000 -40 °C up to +105 °C 100 4.7 19 2 5 11 Ammopack
860240473003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 25 5000 -40 °C up to +105 °C 160 11.75 14 2.5 6.3 11 Ammopack
860240674005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 50 8000 -40 °C up to +105 °C 287 23.5 10 3.5 8 11.5 Ammopack860241
860240574004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 35 8000 -40 °C up to +105 °C 240 16.45 12 3.5 8 11.5 Ammopack860241
860241180004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 250 10000 -25 °C up to +105 °C 930 570 15 7.5 16 21 Ammopack860241
860241381005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 400 10000 -25 °C up to +105 °C 1050 852 20 7.5 18 21 Ammopack860241
860241078002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 200 10000 -25 °C up to +105 °C 980 476 15 5 13 20 Ammopack
860240978004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 160 10000 -25 °C up to +105 °C 680 400.8 15 5 13 20 Ammopack
860241481007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 450 10000 -25 °C up to +105 °C 1120 946 20 7.5 18 31.5 Ammopack
860241380015SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.47 µF 400 10000 -40 °C up to +105 °C 1200 852 20 7.5 16 25 Ammopack
860240272002SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 10 5000 -40 °C up to +105 °C 130 6.8 19 2 5 11 Ammopack
860240373003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 16 5000 -40 °C up to +105 °C 200 10.88 16 2.5 6.3 11 Ammopack
860240474004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 25 8000 -40 °C up to +105 °C 230 17 14 3.5 8 11.5 Ammopack
860240574005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 35 8000 -40 °C up to +105 °C 270 23.8 12 3.5 8 11.5 Ammopack860241
860240675006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 50 10000 -40 °C up to +105 °C 356 34 10 5 10 12.5 Ammopack860241
860241181005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 250 10000 -25 °C up to +105 °C 1300 780 15 7.5 18 21 Ammopack860241
860241381006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 400 10000 -25 °C up to +105 °C 1460 1188 20 7.5 18 31.5 Ammopack860241
860241080006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 200 10000 -25 °C up to +105 °C 1190 644 15 7.5 16 25 Ammopack
860240978005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.68 µF 160 10000 -25 °C up to +105 °C 1100 535.2 15 5 13 25 Ammopack
860241381008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.82 µF 400 10000 1530 1412 20 7.5 18 25 Ammopack
860240273003SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 10 5000 -40 °C up to +105 °C 190 10 19 2.5 6.3 11 Ammopack
860240374004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 16 8000 -40 °C up to +105 °C 245 16 16 3.5 8 11.5 Ammopack
860240474005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 25 8000 -40 °C up to +105 °C 327 25 14 3.5 8 11.5 Ammopack
860240575006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 35 10000 -40 °C up to +105 °C 390 35 12 5 10 12.5 Ammopack860241
860240675007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 50 10000 -40 °C up to +105 °C 500 50 10 5 10 16 Ammopack860241
860241181006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 250 10000 -25 °C up to +105 °C 1500 1100 15 7.5 18 25 Ammopack860241
860241081007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 200 10000 -25 °C up to +105 °C 1380 900 15 7.5 18 21 Ammopack
860240981006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 160 10000 -25 °C up to +105 °C 1310 740 15 7.5 18 21 Ammopack
860241480001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.100 µF 450 5000 -25 °C up to +105 °C 610 1900 17 7.5 16 35.5 Ammopack
860240273004SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 10 5000 -40 °C up to +105 °C 220 15 19 2.5 6.3 11 Ammopack
860240374005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 16 8000 -40 °C up to +105 °C 300 24 16 3.5 8 11.5 Ammopack
860240475006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 25 10000 -40 °C up to +105 °C 460 37.5 14 5 10 12.5 Ammopack
860240575007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 35 10000 -40 °C up to +105 °C 632 52.5 12 5 10 16 Ammopack860241
860240675008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 50 10000 -40 °C up to +105 °C 747 75 10 5 10 20 Ammopack860241
860241181007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 250 10000 -25 °C up to +105 °C 1870 1600 15 7.5 18 31.5 Ammopack860241
860241081008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 200 10000 -25 °C up to +105 °C 1800 1300 15 7.5 18 25 Ammopack
860240981007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.150 µF 160 10000 -25 °C up to +105 °C 1780 1060 15 7.5 18 25 Ammopack
860240273005SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 10 5000 -40 °C up to +105 °C 270 22 19 2.5 6.3 11 Ammopack
860240374006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 16 8000 -40 °C up to +105 °C 420 35.2 16 3.5 8 11.5 Ammopack
860240475007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 25 10000 -40 °C up to +105 °C 580 55 14 5 10 16 Ammopack
860240575008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 35 10000 -40 °C up to +105 °C 760 77 12 5 10 20 Ammopack860241
860240678009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 50 10000 -40 °C up to +105 °C 977 110 10 5 13 20 Ammopack860241
860241081009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 200 10000 -25 °C up to +105 °C 2350 1860 15 7.5 18 31.5 Ammopack
860240981008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.220 µF 160 10000 -25 °C up to +105 °C 2290 1508 15 7.5 18 25 Ammopack
860240274006SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 10 8000 -40 °C up to +105 °C 390 33 19 3.5 8 11.5 Ammopack
860240374007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 16 8000 -40 °C up to +105 °C 500 52.8 16 3.5 8 16 Ammopack
860240475008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 25 10000 -40 °C up to +105 °C 805 82.5 14 5 10 20 Ammopack
860240578009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 35 10000 -40 °C up to +105 °C 1035 115.5 12 5 13 20 Ammopack860241
860240678010SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 50 10000 -40 °C up to +105 °C 1150 165 10 5 13 25 Ammopack860241
860241081001SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.330 µF 200 10000 -25 °C up to +105 °C 3220 2740 15 7.5 18 35.5 Ammopack
860240275007SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.470 µF 10 10000 -40 °C up to +105 °C 540 47 19 5 10 12.5 Ammopack
860240375008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.470 µF 16 10000 -40 °C up to +105 °C 730 75.2 16 5 10 16 Ammopack
860240475009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.470 µF 25 10000 -40 °C up to +105 °C 950 117.5 14 5 10 20 Ammopack
860240578010SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.470 µF 35 10000 -40 °C up to +105 °C 1100 164.5 12 5 13 25 Ammopack860241
860240680011SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.470 µF 50 10000 -40 °C up to +105 °C 1552 235 10 7.5 16 25 Ammopack860241
860240275008SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.1000 µF 10 10000 -40 °C up to +105 °C 900 100 19 5 10 16 Ammopack
860240378009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.1000 µF 16 10000 -40 °C up to +105 °C 1173 160 16 5 13 20 Ammopack
860240478010SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.1000 µF 25 10000 -40 °C up to +105 °C 1552 250 14 5 13 25 Ammopack
860240580011SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.1000 µF 35 10000 -40 °C up to +105 °C 1932 350 12 7.5 16 31.5 Ammopack860241
860240681012SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.1000 µF 50 10000 -40 °C up to +105 °C 2093 500 10 7.5 18 31.5 Ammopack860241
860240278009SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.2200 µF 10 10000 -40 °C up to +105 °C 1540 220 19 5 13 20 Ammopack
860240380010SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.2200 µF 16 10000 -40 °C up to +105 °C 2093 352 16 7.5 16 25 Ammopack
860240480011SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.2200 µF 25 10000 -40 °C up to +105 °C 2400 550 14 7.5 16 31.5 Ammopack
860240280010SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.3300 µF 10 10000 -40 °C up to +105 °C 1900 330 19 7.5 16 25 Ammopack
860241480005
4 files Active i| Production is active. Expected lifetime: >10 years. Ammopack
Order Code Data­sheet Simu­lation
860241475018SPEC
860240672001SPEC
860241478002SPEC
860240672002SPEC
860240572001SPEC
860241375002SPEC
860241175001SPEC
860241075003SPEC
860240975001SPEC
860241478003SPEC
860240472001SPEC
860240572002SPEC
860240673003SPEC
860241378003SPEC
860241178002SPEC
860241075004SPEC
860240975002SPEC
860241175002SPEC
860241478004SPEC
860240372001SPEC
860240472002SPEC
860240573003SPEC
860240674004SPEC
860241178003SPEC
860241381004SPEC
860241078005SPEC
860240978003SPEC
860241481006SPEC
860240372002SPEC
860240272001SPEC
860240473003SPEC
860240674005SPEC
860240574004SPEC
860241180004SPEC
860241381005SPEC
860241078002SPEC
860240978004SPEC
860241481007SPEC
860241380015SPEC
860240272002SPEC
860240373003SPEC
860240474004SPEC
860240574005SPEC
860240675006SPEC
860241181005SPEC
860241381006SPEC
860241080006SPEC
860240978005SPEC
860241381008SPEC
860240273003SPEC
860240374004SPEC
860240474005SPEC
860240575006SPEC
860240675007SPEC
860241181006SPEC
860241081007SPEC
860240981006SPEC
860241480001SPEC
860240273004SPEC
860240374005SPEC
860240475006SPEC
860240575007SPEC
860240675008SPEC
860241181007SPEC
860241081008SPEC
860240981007SPEC
860240273005SPEC
860240374006SPEC
860240475007SPEC
860240575008SPEC
860240678009SPEC
860241081009SPEC
860240981008SPEC
860240274006SPEC
860240374007SPEC
860240475008SPEC
860240578009SPEC
860240678010SPEC
860241081001SPEC
860240275007SPEC
860240375008SPEC
860240475009SPEC
860240578010SPEC
860240680011SPEC
860240275008SPEC
860240378009SPEC
860240478010SPEC
860240580011SPEC
860240681012SPEC
860240278009SPEC
860240380010SPEC
860240480011SPEC
860240280010SPEC
860241480005
Samples
Order Code Data­sheet Simu­lation Downloads StatusCVR
(V (DC))
Endurance
(h)
Operating TemperatureIRIPPLE
(mA)
ILeak
(µA)
DF
(%)
Pitch
(mm)
Ø D
(mm)
L
(mm)
PackagingDesign Kit Samples

Würth Elektronik capacitors

Big portfolio available ex stock

Würth Elektronik capacitors

Big portfolio available ex stock

Würth Elektronik has extended its capacitor portfolio. You will find an overview of our current technologies available ex stock in the graph. More details (e.g. series, characteristics, features, applications, etc.) about each product family can be found in the flyer or for example below. In our flyer you will also find information about our services.

Relationship between voltage and capacitance in the diagram

Available series

  • Series WCAP-ATXX

    • Mounting Style: Radial THT
    • Series: ATG8, ATG5, AT1H, ATET, ATLI, ATUL, ATLL
    • Capacitance: 0.47 – 33000 µF
    • Voltage: 10 – 450 V (DC)
  • Series WCAP-ASXX

    • Mounting Style: V-Chip SMT
    • Series: ASLI, ASLL, ASLU, ASNP, AS5H
    • Capacitance: 0.47 – 6800 µF
    • Voltage: 6.3 – 450 V (DC)
  • Series WCAP-AIXX

    • Mounting Style: Snap-In
    • Series: AIG8, AIE8, AIG5, AI3H
    • Capacitance: 33 – 10000 µF
    • Voltage: 63 – 450 V (DC)
  • Series WCAP-AWXX

    • Mounting Style: Screw
    • Serien: AWG8, AWG5
    • Capacitance: 470 µF – 1 F
    • Voltage: 16 – 630 V (DC)

Comparison of aluminum capacitors

Aluminium-Elektrolytkondensatoren

Aluminum electrolytic capacitors

  • Stable capacitance values at high temperature
  • High voltage ratings
  • Low leakage current
Aluminium-Hybrid-Polymer-Kondensatoren

Aluminum hybrid polymer capacitors

  • Low ESR
  • High ripple current characteristics
  • High stability over the temperature range
  • Low leakage current
  • High lifetime performance
Aluminium-Polymer-Kondensatoren

Aluminum polymer capacitors

  • Low ESR
  • High ripple current characteristics
  • High lifetime performance

Construction

Drawing of a wound capacitor with labels for anode foil, cathode foil, separator paper (soaked with electrolyte), and terminals for anode and cathode.

Wound capacitor

Aluminum electrolytic capacitors are wound capacitors. These consist of aluminum foils with a layer of paper in between.

Cross-sectional diagram of an aluminum electrolytic capacitor with labels for anode (aluminum foil), cathode (aluminum foil), separator paper (soaked with liquid electrolyte), dielectric (oxide layer), and liquid electrolyte. Positive (+) and negative (-) terminals are indicated at the top of the diagram.

Layer structure

The aluminum foil of the anode is formed by anodic oxidation before winding, so that the dielectric (oxide layer) is strengthened. The wound capacitor is completely soaked in electrolyte. This electrolyte is evenly distributed through the paper layer. In addition, the paper layer ensures a distance between the anode and cathode foil.

Example applications

Measurements

Redexpert

Measurements

Redexpert

With the help of REDEXPERT you will find the right capacitor based on your technical requirements. The tool supports, for example, with measured values for capacitance, impedance, ESR and dissipation factor (DF). The ability to compare individual components with each other in terms of measured values enables convenient component selection.

Computer screen with overlapping windows, graphs, and red 3D text: 'ONLINE PLATFORM BASED ON MEASURED VALUES.'

Lifetime

Lifetime calculator

With this tool you can calculate your maximum expected lifetime. Depending on the product family, a different formula is used for the calculation. This calculator can be found in the aluminum capacitor module on the REDEXPERT platform.

Icon of two parallel capacitors with a clock above, next to the text 'Lifetime Calculator.'

Expected lifetime vs. temperature

In this graph you can find the difference in expected lifetime between our different product families. The curves are based on the different formulas and the endurance of this product. The lifetime table and formula can be found in the information sheet.

Grafik, die das Verhältnis zwischen Temperatur und Lebensdauer von Kondensatoren zeigt.

Webinar

Introduction to the capacitor technologies and how to use them

Webinar

Introduction to the capacitor technologies and how to use them

Capacitors make up two thirds of all electronic components and there is a huge diversity of technologies which can overwhelm young engineers. All capacitors store electrical energy in the electrical field created in a dielectric material and they are used for very diverse applications like voltage stability and filtering. How that works differs between tiny MLCCs and huge electrolytic cells, from pF ratings up to the hundreds of Farads in supercapacitors. In this presentation, we introduce different capacitor solutions taking into account the advantages and disadvantages and with a focus on the final application.

alttext yt_img_for_code_YCVcrKE-6ok.jpg 1745304827

Application notes and documents

  • All Capacitors are "Audio Capacitors"

    There is an ongoing discussion within the audio engineering community about the sound quality of amplifiers concerning the audibility of signal distortions. Apparently, capacitors used for coupling and decoupling signals are suspected to be the source or at least a contributor to high-frequency distortions that influence the hearing impression.

  • Application Note ANP071: Aluminum Electrolytic vs. Aluminum Polymer Capacitor and how its benefits are used properly

    Aluminum polymer capacitor is a sub-form of the electrolytic capacitors. The special feature of these capacitor types is that a conductive polymer is used instead of a liquid electrolyte. This requires a special processing step, which is carried out during production. In this chemical reaction, the so-called polymerization, by heating, the still liquid monomer that has been impregnated in place of electrolyte in the separator paper is cross-linked to a solid polymer.

  • Support Note SN008: Expected Lifetime of Aluminum Electrolytic and Aluminum Polymer Capacitor

    The life cycle of a capacitor depends on many factors of the application. An important factor is the temperature or rather thermal load, as it is responsible for the fact that internal structures age over time and the electrical properties deteriorate. This results in increased leakage current, increasing the ESR, which in turn leads to a further increase of the temperature.

  • Support Note SN008: Expected Lifetime of Aluminum Electrolytic and Aluminum Polymer Capacitor

    The life cycle of a capacitor depends on many factors of the application. An important factor is the temperature or rather thermal load, as it is responsible for the fact that internal structures age over time and the electrical properties deteriorate. This results in increased leakage current, increasing the ESR, which in turn leads to a further increase of the temperature.

  • Support Note SN019: Afraid of aging? The effects of time on electrolytic capacitors

    Since the development and production of electrolytic capacitors, designers have had to deal with the issues of aging and shelf life of these products. Electrolytic capacitors have been around for a very long time, but the rapid increase did not occur until the 1960s. There are still many "myths" from that time that revolve around the aging and shelf life of these capacitors.

  • ANP125 Acoustic Effect of Harmonic Distortions caused by Aluminum Electrolytic Capacitors

    This note reports a comparative study of total harmonic distortions (THD) caused by commercial electrolytic capacitors, as produced by Würth Elektronik eiSos as well as purpose-built items. The discussion about the audibility of distortions is made on the basis of human sound perception. This note arrives at the conclusion that capacitors do not add significant distortions to fundamental frequencies as they transfer signals. Modifications of the electrolyte or separation paper have almost no effect on the THD.

FAQ aluminium capacitors

Datasheet WCAP-CSRF

For most parts you can find the detailed information about packaging in the datasheet: If you cannot find them, please get in contact with Würth Elektronik. E.g. you can use the chat on the website.

Example: Page 3 of WCAP-CSRF component datasheet.


You can find the certifications in the datasheet, page 2.

In the case of X/Y safety capacitors, certification information can be found in PDF format in the online platform REDEXPERT.

These links are shown at the right end of the table, under the column “Certificates”.


We provide the document with all the values on our homepage.

You can also download the document by searching for “FIT” or “MTBF” in our download center.

This document reveals the FIT (Failures in time) and MTBF (Mean time between failures) values that can be calculated for each series based on the electrical stress (voltage applied in the case of capacitors) and the temperature applied according to calculation models of Telcordia SR-332 Issue 3.

Please refer to the table of contents at the beginning of the document to find the values for capacitors.


  1. Würth Elektronik part number
  2. Actual ambient operating temperature which the capacitor is used at (°C)
  3. Operating ripple current flowing through the capacitor (A, RMS)
  4. Frequency of the ripple current (Hz)
  5. Operating voltage which is applied to the capacitor (V(DC))

Table shows the multiplier for ripple current vs frequency

Please find the following example (datasheet, page 2)

For all capacitors of series WCAP-A***, WCAP-P*** and WCAP-H*** there is a maximum ripple current in the datasheet. This ripple current is defined at a specific frequency and temperature and it is given as a RMS (root mean square) value.

Since the ripple current is defined at a certain frequency, it can be converted into the respective value for certain frequencies using factors. These factors can be found in the data sheet.

Let’s assume that the rated ripple current of this part (400V part) is 1 A @ 120 Hz. The max. ripple current @ max. temperature and 10 kHz is then 1.41 A.Furthermore, the ripple current can also be increased if the temperature is below the maximum component temperature. However, this must always be considered in the context of the expected lifetime.

The lifetime calculation in RedExpert can be used for a simple estimate. For detailed considerations, please use one of the many ways of contacting Würth Elektronik to obtain a specific lifetime estimate for your capacitor selection. This value may be increased or decreased if the operating conditions in the application are different from the datasheet.


Extract from the Lifetime calculator in Redexpert

You can find the lifetime calculation on REDEXPERT.

The lifetime calculator may be opened with the sand clock button in the left of the Electrolytic/Polymer/Hybrid . The user must be registered and logged, as this functionality is restricted to registered users.

You can set the conditions in the input box and for Frequency and Temperature you may also move the sliders in the graphs in the right.


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Articles from this product series can be found in the following assortments:

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