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How to Replace Canister Capacitors

Capacitors are devices used to store electric charge. Polarized capacitors -- such as electrolytic capacitors -- are commonly used in applications where part of the circuit must maintain a higher direct current (DC) voltage than other parts of the circuit. Polarized capacitors are often packaged in a canister-type module. Since polarized capacitors generally do not have as long a lifespan as their non-polarized counterparts, it may be necessary to replace a polarized capacitor within a circuit.

Things You'll Need

Circuit with installed canister capacitor
Electrical pliers
Electronic solder
Soldering iron
Replacement capacitor

Instructions

- 1
  Identify the negative lead on the capacitor installed in the circuit. Use the pliers to cut the negative capacitor lead near the capacitor base.
- 2
  Twist together the negative lead from the replacement capacitor with the cut lead that is still attached to the circuit. Solder this connection.
- 3
  Cut the positive lead on the old capacitor near the capacitor base. Dispose of the old capacitor accordingly.
- 4
  Twist together the positive lead from the new capacitor to the cut lead still attached to the circuit. Solder this connection.

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