Hi ericgibbs,hi R,
Why do you have the extra 360R and 0.05uF components in the circuit.?
The 0.01uF has to be a mains rated capacitor and the 39R say 0.5W
Also note the 330R in the d/sheet
E
View attachment 157877
Thank you E,hi R,
Check thru this Article link for capacitor information. @ndavis17
https://www.allaboutcircuits.com/technical-articles/safety-capacitor-class-x-and-class-y-capacitors/
I would always fit the 330R.
E
From this App Note:
The 330 ohms gate resistor (RG) is only necessary when the internal gate impedance of the triac or SCR is very high which is the case with sensitive gate thyristors. These devices display very poor noise immunity and thermal stability without RG. The value of the gate resistor in this
case should be between 100 and 500. The circuit designer should be aware that use of a gate resistor increases the required trigger current (IGT) since RG drains off part of IGT.
The document attached may also help. It includes some calculations. Consider that the circuit you attached is for 240VAC. Is that the operation voltage you wish?
In this case you shouldn't modify that much your first circuit. Although I suggest the schematic uploaded by @ericgibbs which omits the 470 ohms resistor and 0.05uF capacitor.thank you,,
i will read it ..
yes ,its (220-240)VAC
thank youIn this case you shouldn't modify that much your first circuit. Although I suggest the schematic uploaded by @ericgibbs which omits the 470 ohms resistor and 0.05uF capacitor.
by Duane Benson
by Aaron Carman
by Duane Benson