Support Forum (EN/FR)

Hello,

I have a K5201 kit and my Triacs keep blowing up. I replaced them. The only one still working is one from another K5201 kit
Could it be a IC that is broken.

The lights I use are 1watt Led Bulbs that work on 220V. So that should not be a problem since the triacs can handle 1,5A.

Is there something I'm missing?

Kind Regards,
Mark

Yes, the 1W led bulbs are most likely the cause of troubles, as they contain a SMPS. Did you try with regular lightbulbs, for which the kit has been designed?

I tried with regular lights before switching to led bulbs. I thought the triacs where old and replaced all of them with a simular model. The regular lights i tried where 40w bulbs. The only one still working came from a other K5201 kit which I used to use as slave unit. I might just go ahead an switch that one over and give the old one a spin. Might just do the trick.

What is the problem with an SMPS and a Triac by the way?

SMPS is a capacitive load. TRIACs are not happy with capacitive loads, unless they are switched at zero-cross, but still, SMPS's draw huge peak currents at turn-on, another thing they don't like.

Try checking the power supply voltage of your circuit. Did you use a regulator? The TRIAC is getting a high voltage that's why it keeps on blowing up and also try using another bulb. Check the input (Vcc) of your TRIAC and try a normal bulb and see if it's gonna work.


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