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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™


Aluminum electrolytic capacitors

Extended Cathode Handles High Ripple Current resistance

Extended cathode foil at right gets heat out

Double Peg Compression

Potted

Rilled


Cde expected life calculator
CDE Expected Life Calculator resistance

  • 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 resistance

  • 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 resistance

  • 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 resistance

  • 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 resistance

  • 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 resistance

  • 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 resistance 4700 µF 450 V Comparison 60 °C, 12 A @ 120 Hz, 400 V


The snap in capacitors

Industry’s widest selection including resistance

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

http://www.cde.com/catalog/alum/#snap-in

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


Aluminum electrolytic capacitors
Next high ripple aps

  • 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.