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Aluminum Electrolytic Capacitors . More Bang for the Buck. Aluminum Electrolytic Advantage. The high value capacitor choice Typically last more than 10 years Lowest cost dielectric for high capacitance and energy storage 4 to 10 times the capacitance per dollar of film capacitors

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aluminum electrolytic capacitors

Aluminum Electrolytic Capacitors

More Bang for the Buck

aluminum electrolytic advantage
Aluminum Electrolytic Advantage
  • The high value capacitor choice
  • Typically last more than 10 years
  • Lowest cost dielectric for high capacitance and energy storage
  • 4 to 10 times the capacitance per dollar of film capacitors
  • Great for power electronics bus capacitors to 600 V
aluminum electrolytic principal applications
Aluminum Electrolytic Principal Applications
  • Power-supply input capacitors output capacitors
  • Bus capacitors for inverters in UPS systems Motor-drives
  • Photoflash and Strobe Flash
  • Welders
linear power supply application
Linear Power Supply Application
  • Transformer steps 120 Vrms down to 12.6 Vrms
  • 12.6 Vrms AC voltage is 35.6 V peak to peak
  • Fullwave rectified voltage is 0 to 16.4 V
  • Add 200 µF capacitor: filtered voltage is 16 V with ±0.4 V ripple voltage.
ripple current is king
Ripple Current is King
  • Ripple is from rectification and switching
  • Ripple current heats the capacitor (blue peaks below)
  • Higher temperature shortens capacitor life
  • But operating life claims and calculation methods are not standardized, so the capacitor maker with the best models, technology, and technical sales force has an advantage
temperature rise
Temperature Rise
  • The temperature rise DT is the thermal resistance q from the capacitor core to ambient times the power PDT = qP = qI2(ESR)
  • To lower the temperature rise lower thermal resistance q lower power P
lowering temperature rise
Lowering Temperature Rise
  • Lower thermal resistance q with Thermal Pak capacitor construction
  • Lower power P with lower ESR from new electrolytes, separators & foils
  • You can lower q with capacitor choice and cooling with a fan or heatsink
thermal pak
Compression Design with extended cathode, low thermal resistance

Better shock and vibration

Safety vent can’t be blocked by tar

Lighter weight

Thermal Pak™

Extended Cathode Handles High Ripple Current

Extended cathode foil at right gets heat out

Double Peg Compression



cde expected life calculator
CDE Expected Life Calculator
  • Allows you to predict life with your operating conditions
  • Calculates temperature rise and expected life for screw terminal capacitors snap-in capacitors
  • Accurate—Based on extensive thermal measurements of capacitor materials
the following is a cde calculator comparison of 550c to dcmc
The following is a CDE Calculator Comparison of 550C to DCMC
  • Both in 3 inch diameter by 5⅝ long cans
  • 550C is 3700 µF, 450 V
  • DCMC is 5600 µF, 450 V
  • Both 20 amps of ripple current at 360 Hz
  • Both 25 amps of ripple current at 2 kHz
  • Expected lives: 550C about 20 years, DCMC about 1 year.
type 550c the 105 c inverter capacitor1
Type 550C, The 105 °C Inverter Capacitor
  • Longest life, highest ripple current type
  • Standard of comparison
  • 200 V to 450 V, inverter voltage range
  • Compares with UCC LXR Series
  • Special specifications, part number 550CExxxx
type 520c the 85 c inverter capacitor
Type 520C, The 85 °C Inverter Capacitor
  • High value, high ripple current type
  • The next step below Type 550C
  • 200 V to 500 V, inverter voltage range
  • > 80% of Type 550C ripple capability
  • Compares with UCC RWF Series Rifa PEH 105 °C
type 500c long life capacitor
Type 500C, Long-Life Capacitor
  • Twice the life of Type DCMC
  • 6.3 V to 500 V, wide range
  • > 60% of Type 550C ripple capability
  • Compares with CDE Type 3188 Aerovox Type CG Rifa PEH 169 85 °C
type dcmc best value capacitor
Type DCMC, Best Value Capacitor
  • General purpose, first-choice low cost
  • 6.3 V to 550 V, widest range
  • 150% of Type 550C capacitance
  • > 40% of Type 550C ripple capability
  • Compares with CDE Type 3186 Aerovox Type CGS UCC U36D Series
typical hi ripple lifetimes 4700 f 450 v comparison 60 c 12 a @ 120 hz 400 v
Typical Hi-Ripple Lifetimes 4700 µF 450 V Comparison 60 °C, 12 A @ 120 Hz, 400 V
the snap in capacitors
Industry’s widest selection including

New Type SLPX 85°C, 3000 h, low cost

New Type SLP 105°C, 3000 h, low cost

25% smaller Types 380LQ & 381LQ

25% more ripple Type 381LR, 105°C

4 & 5 pin Types 382LX and 383LX

The Snap-in Capacitors
type mlp flatpack capacitor
Welded seal, flat capacitor can replace multiple snap-ins in high ripple aps

New, 450 V. Now available 7.5 to 450 V

Double the ripple capability with a heatsink

50-year life with nearly hermetic seal

MLS with stainless case, 100 year life

Type MLP, Flatpack Capacitor

Less than ½ inch tall20 joules of energy storageEasy to stack into modulesEasy to heatsink Great at cold to –55 °C

  • Remember CDE Cornell Dubilier as your source for aluminum electrolytic capacitors
  • Enjoy the benefits of the life calculator at http://www.cde/com/calc.htm
  • Go to major distributors for CDE Cornell Dubilier capacitors.