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Registered Member #3824
Joined: Sun Apr 10 2011, 08:29PM
Location: Edmonton, Alberta, Canada
Posts: 54
Hi, has anybody ever tried to heatsink the leads of components while they are soldering? I am soldering a string of 1n4008 diodes and they are getting VERY hot even when only touched for a second or two. Is there any good way of heatsinking the leads so as to not destroy the diodes?
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
I find forceps really useful for holding wires or components still whilst soldering and they act as quite a good heatsink. A very useful tool for general grip.
Some people use alligator clips as lead heatsinks during soldering, There are heat sink clips avalible but they should be unnecessary for making a diode string. How are you going about assembling them? I've seen some people bend the leads into hooks where as I just clip the leads to length and solder them by having a blob of solder on the iron tip. Although that only works if the leads are fresh/not oxidized, otherwise they need more heat/flux. What kind of soldering iron and solder are you using?
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
LD LANGER wrote ...
Hi, has anybody ever tried to heatsink the leads of components while they are soldering? I am soldering a string of 1n4008 diodes and they are getting VERY hot even when only touched for a second or two. Is there any good way of heatsinking the leads so as to not destroy the diodes?
Diodes and most other components are built to withstand the heat of soldering. After all, in the real world they are either baked at very high temperatures or sent over a waterfall of molten metal...
Registered Member #509
Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329
If you can do the joint in 5 seconds or less, you should be fine. If its taking more then 5 seconds, you need a bigger soldering iron tip (more thermal mass, more contact area) or a higher soldering iron temp. Careful with a higher temp though, as it makes overheating easier if you do go past the 5 seconds. All this is assuming your tip is clean, and holds a tin well, so it can make a "solder bridge" to the part for thermal transfer.
Obviously the 5 second rule doesnt really apply as much when it comes to bigger stuff. But if you had an iron capable of doing so, it really wouldnt hurt.
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heatsink for soldering
