Higher current Switching triac

[kurrodu]

In the circuit below the triac BT 136 switches only upto 60Watts. I would like to use a higher wattage bulb (100 Watts). Could you please suggest another triac.
https://www.electronicsforu.com/EFYLinux/circuit/June2008/CI-05_June08.pdf

 

[gaspode42]

Hi

You forgot to attach the circuit, but try something like this.

 

[kurrodu]

Please check now, the link has been revised.

 

[gaspode42]

I may be incorrect but according to the data-sheet the BT136 will handle up to 4A, so a 100W bulb should work as is I think.

 

[kurrodu]

I connected one 60 watt bulb and one 40 watt in series which are dim when lit. Do you think I can use BT 136 replacing BT 139 in the circuit ?

 

[ericgibbs]

I connected one 60 watt bulb and one 40 watt in series which are dim when lit. Do you think I can use BT 139 replacing BT 169 in the circuit ?

hi,
The BT169 triac is only rated at 0.5Arms, whereas the BT139 is 4Arms.

 

[kurrodu]

Sorry Ericgibbs, I meant replacing Bt 136 with Bt 139

 

[mdorian]

Yes , you can , change R10 and R9 to 1..2 Kohm , at least 1W because BT139 need four times gate trigger current than BT136.

 

[ericgibbs]

Sorry Ericgibbs, I meant replacing Bt 136 with Bt 139

The BT139 is a 16Arms triac.

What are you planning to control.?

The latching and holding currents for the BT139 are approx double that of the BT136.

EDIT:
If you use the BT139, you may have to reduce the 5.6K on the MOC3021 to approx 3.9K.
The MOC and BC547 will be OK.

 

[Jirka46]

I connected one 60 watt bulb and one 40 watt in series which are dim when lit. Do you think I can use BT 136 replacing BT 139 in the circuit ?

Of course they are dim. If you want full power you have to connect them in parallel.
Jirka

 

[kurrodu]

Of course they are dim. If you want full power you have to connect them in parallel.
Jirka

You rock!!!.

I realized that after a made a post here.

THANK YOU ALL FOR THE SUPPORT