Author Topic: TO220 with low profile and heatsunk?  (Read 677 times)

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Online FaringdonTopic starter

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TO220 with low profile and heatsunk?
« on: May 17, 2022, 10:53:34 am »
Hi,
Are there any TO220 heatsinks made to be used as in the attached? We can find none.
Its bent back so its got low height
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Offline SMTech

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Re: TO220 with low profile and heatsunk?
« Reply #1 on: May 17, 2022, 12:53:15 pm »
Lots of them, more if you include the ones that physically allow it but are designed to be board mounted vertically.

530614B00000G as a starter
 
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Offline tooki

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Re: TO220 with low profile and heatsunk?
« Reply #2 on: May 18, 2022, 01:32:38 am »
Hi,
Are there any TO220 heatsinks made to be used as in the attached? We can find none.
Its bent back so its got low height
Gosh, I wonder why… you want the fins facing the PCB? Where, pray tell, is your airflow supposed to come from?
 
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Offline T3sl4co1l

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Re: TO220 with low profile and heatsunk?
« Reply #3 on: May 18, 2022, 12:34:17 pm »
I'd assume it's at the board edge, as, even if the fins were flush against the board (not a show stopper, but requires forced air and ducting, PITA) the pins won't be long enough to still reach the board for any reasonable height of heatsink.

Much more common to mount the device underneath (leads bent up), so the PCB can be mounted to the heatsink with standoffs.  Or at the board edge, PCB can be flush mounted to the heatsink.

Example: well, not a great one, but you can just see it anyways.



Note the large holes in the middle of the board, through which tabs can just be seen.

To minimize lead strain, the devices need to be soldered in place after fixing to the heatsink.

Tim
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