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  • ETD51 (-030) darlington transistor TO-220 case

    From [email protected]@21:1/5 to All on Mon Apr 25 17:45:37 2022
    Hi, can anyone point me in the direction of a data sheet for this device please? Failing that, even some basic data would be useful!

    TIA, Chris

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  • From Phil Hobbs@21:1/5 to [email protected] on Tue Apr 26 11:26:29 2022
    [email protected] wrote:
    Hi, can anyone point me in the direction of a data sheet for this device please?  Failing that, even some basic data would be useful!

    TIA, Chris

    I don't see anything online either. Is this a repair problem, or do you
    have a box of those things and want to know what they're good for?

    If it's a repair, I suggest posting a link to the schematic and a
    description of what the box does, to sci.electronics.repair--there are a
    lot more folks over there who can maybe help.

    Good luck!

    Cheers

    Phil Hobbs

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  • From [email protected]@21:1/5 to Phil Hobbs on Tue Apr 26 16:55:24 2022
    On 26/04/2022 16:26, Phil Hobbs wrote:
    [email protected] wrote:
    Hi, can anyone point me in the direction of a data sheet for this
    device please?  Failing that, even some basic data would be useful!

    TIA, Chris

    I don't see anything online either.  Is this a repair problem, or do you have a box of those things and want to know what they're good for?

    If it's a repair, I suggest posting a link to the schematic and a
    description of what the box does, to sci.electronics.repair--there are a
    lot more folks over there who can maybe help.

    Good luck!

    Cheers

    Phil Hobbs

    Ok, thanks for the guidance. For the record, a BU941ZT was suggested as
    an alternative (its a motorcycle TCI box) - but I am not sure on what
    basis. Either way, the latter doesn't work whereas the former did - to
    some extent :-/

    Chris

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  • From Three Jeeps@21:1/5 to [email protected] on Tue Apr 26 11:42:45 2022
    On Tuesday, April 26, 2022 at 11:55:27 AM UTC-4, [email protected] wrote:
    On 26/04/2022 16:26, Phil Hobbs wrote:
    [email protected] wrote:
    Hi, can anyone point me in the direction of a data sheet for this
    device please? Failing that, even some basic data would be useful!

    TIA, Chris

    I don't see anything online either. Is this a repair problem, or do you have a box of those things and want to know what they're good for?

    If it's a repair, I suggest posting a link to the schematic and a description of what the box does, to sci.electronics.repair--there are a lot more folks over there who can maybe help.

    Good luck!

    Cheers

    Phil Hobbs
    Ok, thanks for the guidance. For the record, a BU941ZT was suggested as
    an alternative (its a motorcycle TCI box) - but I am not sure on what
    basis. Either way, the latter doesn't work whereas the former did - to
    some extent :-/

    Chris
    Is what you posted ETD51 the correct p/n? I don't understand the suffix (-030). All combinations of the p/n string turn up empty (house number?)
    My cross ref catalogs the most recent is 2010, provides no crosses either.
    What does it do in the ckt?

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  • From [email protected]@21:1/5 to Three Jeeps on Wed Apr 27 12:53:16 2022
    On 26/04/2022 19:42, Three Jeeps wrote:
    On Tuesday, April 26, 2022 at 11:55:27 AM UTC-4, [email protected] wrote:
    On 26/04/2022 16:26, Phil Hobbs wrote:
    [email protected] wrote:
    Hi, can anyone point me in the direction of a data sheet for this
    device please? Failing that, even some basic data would be useful!

    Ok, thanks for the guidance. For the record, a BU941ZT was suggested as
    an alternative (its a motorcycle TCI box) - but I am not sure on what
    basis. Either way, the latter doesn't work whereas the former did - to
    some extent :-/

    Is what you posted ETD51 the correct p/n? I don't understand the suffix (-030). All combinations of the p/n string turn up empty (house number?)
    My cross ref catalogs the most recent is 2010, provides no crosses either. What does it do in the ckt?

    ETD51 I think is the generic type whereas ETD51-030 was from a specific
    vendor (I think!). It is used as a driver for the primary of the HT
    coil for the spark plug.

    I have a datasheet for the BU941ZT which declares it to be an NPN
    darlington - I just want to check the ETD51-030 has similar
    characteristics and, above all, has the same pinout.

    Chris

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  • From Gonzo333@21:1/5 to All on Fri May 12 18:45:03 2023
    Hi Chris ,in the event that you haven't sorted-it , a Bosch BIP373 should work better than the original , though it does have a thermal cut-out past a certain temp. Also , STD901T will also work as many have been fitted to the first-series TCI-boxes
    for the 81 yamaha v-twins . They are also superior to the originals . Happy-Trails, Dave NZ

    --
    For full context, visit https://www.electrondepot.com/components/etd51-030-darlington-transistor-to-220-case-35218-.htm

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  • From [email protected]@21:1/5 to All on Sat May 13 16:58:53 2023
    On 12/05/2023 19:45, Gonzo333 wrote:
    Hi Chris ,in the event that you haven't sorted-it ,  a Bosch BIP373
    should work better than the original , though it does have a thermal
    cut-out past a certain temp.  Also , STD901T will also work as many have been fitted to the first-series TCI-boxes for the 81 yamaha v-twins .
    They are also superior to the originals . Happy-Trails, Dave  NZ

    Ta for that. I never sorted the TCI box and ended up buying a
    replacement 2nd hand one. It didn't fix the original problem which
    turned out to be...

    ...the breather 'wadding' in the bike cap fuel vent had become
    non-breathing!
    This was eventually, and tortuously, diagnosed by realising there was a
    marked difference in float level between 'running' and 'static'

    Cheers, though, I would like to get the original box functional again so
    I'll give those a look.

    Chris

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