RC Snubber Calculator

How RC Snubber works

For RC Snubber, use τ in µs = R × C in µF. RC Snubber uses Resistance, Capacitance to report Snubber time constant.

With the loaded values, snubber time constant evaluates to 10.00 µs. Test resistance separately and preserve the baseline snubber time constant.

Inputs for RC Snubber

Resistance and Capacitance belong to RC Snubber. Keep source units with resistance. For coil current, use Relay Coil Current Calculator.

The RC Snubber defaults demonstrate arithmetic only. Replace resistance with case-specific data.

Resistance

Example entry: 100 Ω.

Capacitance

Example entry: 0.1 µF.

Reading the RC Snubber result

This output represents RC Snubber.

Before selecting equipment for RC Snubber, compare snubber time constant with available ratings and operating limits.

Measurement and units

Use component tolerances, voltage ratings, current limits, frequency behavior, and thermal data from the selected parts. Check prefixes on resistance.

Keep the resistance unit and measurement point consistent across RC Snubber cases.

Limits of this calculation

Snubber design must also limit resistor pulse energy.

Only the listed RC Snubber inputs contribute to snubber time constant. Unentered effects remain outside RC Snubber.

A useful RC Snubber comparison

Record snubber time constant before testing a different resistance value.

Document the alternate resistance source.

RC Snubber record notes

Record source and operating details for resistance.

Retain raw snubber time constant beside its selected rating.

Questions about RC Snubber