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Old 12-02-2022, 10:56 AM   #1
mediaman083
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Default HML1225 Thyristor replacement

Hello again folks!

Need some help finding a suitable replacement for a couple HML1224 thyristor's.

These aren't manufactured any longer and the only comparable replacement I can find on Digikey is a MCR100-5 A1G.. and wouldn't you know it.. that one is no longer made either.

This is for a vintage Christmas light chaser function box.
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Old 12-02-2022, 11:16 AM   #2
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Default Re: HML1225 Thyristor replacement

got a datasheet for it?
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Old 12-02-2022, 11:21 AM   #3
mediaman083
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Default Re: HML1225 Thyristor replacement

Sure do!

https://pdf1.alldatasheet.com/datash...C/HXL1225.html

That's what I was trying to go by, but I can't find anything closely comparable. At least not in my limited knowledge.
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Old 12-02-2022, 08:18 PM   #4
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Default Re: HML1225 Thyristor replacement

Try Mouser.
Mouser #:
610-BRX49-PB

Mouser #:
610-CS92D-TL
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Old 12-03-2022, 08:52 AM   #5
mediaman083
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Default Re: HML1225 Thyristor replacement

Well, I was hoping to find one that was in stock so I could get them working this year, but I guess with something of this age I can't be super picky!

Thanks for finding those CapLeaker
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Old 12-03-2022, 10:42 AM   #6
stj
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Default Re: HML1225 Thyristor replacement

try a triac
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Old 12-03-2022, 03:19 PM   #7
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Default Re: HML1225 Thyristor replacement

Digikey P0102DA 5AL3 ?
Attached Files
File Type: pdf P01 series.pdf (180.2 KB, 3 views)
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Old 12-03-2022, 08:34 PM   #8
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Default Re: HML1225 Thyristor replacement

I would not use a triac because I have found one of these was multiplexed using the two line sine-wave polarities. Just to get more (colours to control) out of the few wires in the string I guess. They really need to have a fuse in these as well. The one I had gave me the creeps with the skinny wire and messy PCB with no clearances.

BT149G 600V 0.8A KGA pinout or BT169. Littelfuse seems to have different pinout.
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Old 12-04-2022, 05:03 PM   #9
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Default Re: HML1225 Thyristor replacement

Thank you redwire! Those all are in stock and look to be right what I was after. kudos!

Last edited by mediaman083; 12-04-2022 at 05:07 PM..
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