Datasheet

Typical failure modes and factors of aluminum electrolytic capacitors.
Failure mode
Failure mechanism(internal
phenomenon)
Production factor Application factor
Capacitance
reduction
tan &
increase
Leakage current
increase
Use of Halogenated solvent
Use of adhesive
Use of coating material
Vent operates
Open
Short circuit
Over voltage applied
Excessive ripple
current
Reverse voltage applied
Severe
charging-discharging
AC voltage applied
Used for long period of
time
Stress applied to leads
Use for a high temperature
Infiltration of
CL
-
Reduced anode
foil capacitance
Increase in
internal pressu
re
Electrolyte
evaporation
Deterioration of
oxide film
Leads improperly connected
Corro-sion
Insulation breaddown of film
or electrolytic paper
Reduced cathode foil
capacitance
Increase in
internal
temperature
Burr(s) on foil
leads
Leads improperly
connect
Mechanical stress
Metal particles In
capacitor
Insufficient
electrolyte
Defect of oxide
film
Aluminum Electrolytic Capacitors
Distrelec Schweiz AG, Grabenstrasse 6, 8606 Nänikon, Switzerland, T [phone], [e-mail], distrelec.com