BTA24-800CW can't switch off 60 W resistive lump

momensalah · ‎2025-07-27

i am using MOC3063 as an optocoupler and BTA24-800CW as a triac .with 220 V ac and it worked fine (switch on and off) with the 10W,5W,3W resistive loads but when using 60 W incandescent lump it only turn on but not off

i am using this basic circuit . Even tried with many different resistance value (Rled=100,R=330)

Peter BENSCH · ‎2025-08-07

Welcome @momensalah, to the community!

Your basic schematic only shows the principle of such controls. For clean control and operation, please read the application note AN5114 carefully, where such problems are discussed in detail, e.g. in section 2.4.

Furthermore, you have not specified what you mean by switching on and off: TRIACs are usually used to implement phase angle control. If you are doing the same, are you working with leading-edge or trailing-edge control?

Regards
/Peter

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