Electrical

RC Snubbers: Protecting AC Triac Switches

Electrical Diagrams · made in Skemio

Schematic of 230V AC mains line powering an inductive motor load alongside an RC snubber branch with a damping resistor and capacitor.
Schematic of 230V AC mains line powering an inductive motor load alongside an RC snubber branch with a damping resistor and capacitor.
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What it shows

  • Sudden dV/dt transitions cause spurious turn-on in thyristors.
  • Series RC networks absorb rapid voltage steps across the switch.
  • The resistor damps ringing while capacitor absorbs surge energy.

The takeaway

An RC snubber limits dV/dt to keep inductive switching reliable and spark-free.

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