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Testing a Triac (BT136-600E)

Discussion in 'General Electronics Chat' started by Teufelwolf, Jun 24, 2013.

  1. Teufelwolf

    Teufelwolf Member

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    I got a couple of the BT136's
    http://www.nxp.com/products/thyristors/4_quadrant_triacs/BT136-600E.html

    I was trying to use them in place of a C106B
    http://www.mouser.com/ds/2/308/C106-D-108983.pdf
    for the Lesson 13 in Electronic Circuits for the Evil Genius (see attached).
    Could not get it work, but I don't have a speaker or buzz, just used a LED.
    Also tried it with a SCR TYN612 as the book seems to use TRIAC and SCR interchangeably.
    http://www.st.com/web/catalog/sense_power/FM144/CL1220/SC127/PF65526
    Still didn't work.
    I found a very basic Triac test circuit.
    circuit-for-testing-triac.jpg (used a 6W Led Lamp as the load L1)

    I've read over the datasheets, but I admit that a lot of the graphs and data is still over my level of comprehension at this point. Am I missing something obvious?
     

    Attached Files:

  2. Mr RB

    Mr RB Well-Known Member

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    The C106B only needs 0.2mA to activate its gate, the BT136 needs a lot more, maybe 10-20mA.

    Your 1k gate resistor needs to be reduced for 12v operation. The Triac test circuit you showed seems ok, with a gate resistor of about 270 ohms. You could even reduce that further to about 100 ohms.
     
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  3. Teufelwolf

    Teufelwolf Member

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    Ah that worked. Thanx.
     

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