Snubberless triac and need for external snubber circuit.

[mukhtarfarid]

Posted on March 08, 2015 at 12:10

I have simple question about snubberless triac. When it is said that the triac is snubberless do still need an external snubber circuit?

[Benoit RENARD]

Posted on December 06, 2016 at 09:50

Hello,

Sorry for the delay, but it can help anyone else.

No. No need of a snubber with a snubberless Triac.

The definition of a snubber is a R-C circuit in parrallel of the device to help it to be properly turned off.

The Snubberless technology by ST allows to have devices with a strong turn-off commutation performance (see dI/dtc parameter, and whatever the dV/dt reppalied to the device).

I can advice you to read the application note AN 439 'Snubberlessâ„¢ and logic level TRIAC behavior at turn-off' for more information.

Best Regards

Benoit