What is Ballast Resistor?

Definition

A resistor used to limit current flow or stabilise voltage in a circuit. Ballast resistors are found in drive precharge circuits and lamp drivers, where they prevent damaging inrush current at power-up.

Related Terms

Bleeder Resistor

A resistor connected across DC bus capacitors to safely discharge stored energy ...

Braking Resistor

A power resistor used to dissipate excess energy generated when a motor decelera...

Inrush Current

The initial surge of current drawn when a motor, transformer, or capacitor bank ...

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