Where to purchase LM323K Heatsink?

5 posts / 0 new
Log in or register to post comments
Last post
September 24, 2009 - 10:01pm
#1
servobit
Offline
Last seen: 14 years 6 months ago
Joined: Apr 12 2006 - 23:01
Posts: 39
Where to purchase LM323K Heatsink?

Hi,

I'm looking for another heatsink for the LM323k voltage regulator.
(I have some, but they are about half the height)

Does anyone have a source for these?

thx in advance

John Calande
http://apple1computer.blogspot.com/

Top
September 25, 2009 - 4:28pm
servobit
Offline
Last seen: 14 years 6 months ago
Joined: Apr 12 2006 - 23:01
Posts: 39
Found heatsink at Mouser...

I think this is the right one... 1.25" high:

http://www.mouser.com/ProductDetail/Wakefield/680-125A/?qs=VVKQmw408U%252b09FGM51sA2A%3d%3d

Wakefield 680-125A

Top
December 30, 2014 - 9:55pm
Sdinet
Offline
Last seen: 8 years 10 months ago
Joined: Apr 8 2014 - 15:59
Posts: 23
Re: Where to purchase LM323K Heatsink?

I believe the part number recommended here is actually too tall at 1.25", instead it should be 1" tall. The number I recommend is WAKEFIELD 680-10A

Top
December 31, 2014 - 9:04am
ChristopherB
Offline
Last seen: 5 years 10 months ago
Joined: Aug 24 2013 - 11:46
Posts: 47
Re: Where to purchase LM323K Heatsink?

Based on the dimensions that I took from an original, Wakefield 680-10A is correct.

They are 1.81" (46mm) square, with a 1" (25.4mm) height.

In operation, it gets very warm. I would not recommend substituting the shorter
680-75A or 680-5A.

Top
December 31, 2014 - 2:51pm
Corey986
Offline
Last seen: 3 weeks 10 hours ago
Joined: Oct 9 2011 - 12:54
Posts: 1353
Re: Where to purchase LM323K Heatsink?

I would agree don't go smaller. In fact the height difference between the 1" and 1.25" is barely noticeable. The heat dissipation isn't. I would suggest going with the 1.25" just to be safe. When an LM323 goes it can just short the raw voltage across costing you many components on your board.

Cheers,
Corey

Top
Log in or register to post comments