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How to Replace a Resistor With Higher Wattage

A resistor is an electrical device that limits current through a circuit. Resistors impede the flow of current and convert some of the power passed through the resistor into heat. Each resistor has a power -- or wattage -- rating in addition to the specified resistance rating. When power exceeding the resistor power rating is applied to the resistor, the resistor will quickly overheat and burn out. If this has occurred in your circuit, you may wish to substitute the failed resistor with a resistor having a higher power rating.

Things You'll Need

Circuit with installed resistor
Replacement resistor
Electrical pliers
Electronic solder
Soldering iron

Instructions

- 1
  Use the electrical pliers to cut one the leads from the installed resistor. Cut these leads as close to the body of the resistor as possible. Dispose of this resistor accordingly.
- 2
  Twist one of the leads from the replacement resistor to one of the cut wire leads. Melt a small drop of solder to the twisted wire joint, and smooth out the soldered joint using the tip of the soldering iron. Make sure that the soldered joint is shiny and free of lumps.
- 3
  Twist together the remaining lead from the replacement resistor with the remaining cut wire lead. Solder this electrical joint.

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