Is this triac circuit suitable for driving loads up to 20A?

Question

Arduino

To control the warm, I decided to use a triac.
I got this circuit

. There are 2 important components in the circuit.

1. Triac BT139
   
2. Optothyristor MOC3041
   

Unfortunately, my knowledge is not enough to determine whether this scheme is suitable for the requirements

• Control with 5V
  
• Permissible load up to 20A
  

Perhaps something should be changed in the scheme? Is it worth it to make and use such a device on your own, without experience?

Answer 1

This is a typical MOC wiring diagram, nothing needs to be changed. Only now the BT139 triac will not pull 20A ( datasheet ) You need something more powerful .
It's worth a try ("experience is the son of difficult mistakes") Do not forget safety precautions!

Answer 2

Without a huge radiator, the triac will burn out at 20A. Approximately 1.3V falls on the simistor, the thermal resistance of the TO220 case is 62 deg / W.

Answer 3

As an alternative, I found this Thermostat with rs-485