Reconnecting the lead onto a peltier

compjunkie · 12-29-2001, 05:23 PM

I was fitting my 172W peltier into a neoprene gasket I had made for insulaitng between the coldplate and the block of my Maze2-1. I was pulling on of the wire leads down into a slit I had made for it in the neoprene when I pulled a little too hard and the lead just came off. My question is, how do I reconnect it? Would the heat from soldering the lead damge the pelt? Another option I considered is conductive epoxy (I can get a free sample from Chemtronics), but wasn't sure if it would work right since it is designed for repairing circuits on boards not connecting broken wires. If anyone has any other ideas on how to reconnect it, it would be great.

GigaFrog · 12-30-2001, 06:45 PM

The solder used for the junctions of a pelt are high temp, the risk of reflow is low.
The wires are soldered with low temp solder, so that if your pelt overheats, the lead solder will reflow, the wires will them come off and the pelt will get disconnected, preventing meltdown of the junctions solder. The lead solder will reflow at a much lower temp than the junctions solder.
The best would be to heat up the area where the lead was soldered, until solder reflows, then apply the wire lead and remove the soldering iron.

It is strange that the lead came off like that. Probably a bad solder.

Brad · 12-31-2001, 03:38 PM

just try to solder it back on, you've got nothing to lose

H2o · 01-13-2002, 07:55 PM

where did you get the TEC? dangerden? if so, my friends TEC did the same thing, except his came broken in the package

compjunkie · 01-13-2002, 11:19 PM

I bought it used from a guy on [H]ard, I ended up just buying a new one from dangerden because I could not get it to solder right.

Brad · 01-14-2002, 06:10 PM

one of my pelts blew up, looking back on it, it may just be the soldering..

12-29-2001, 05:23 PM	#1
compjunkie Cooling Neophyte Join Date: Nov 2001 Posts: 6	Reconnecting the lead onto a peltier I was fitting my 172W peltier into a neoprene gasket I had made for insulaitng between the coldplate and the block of my Maze2-1. I was pulling on of the wire leads down into a slit I had made for it in the neoprene when I pulled a little too hard and the lead just came off. My question is, how do I reconnect it? Would the heat from soldering the lead damge the pelt? Another option I considered is conductive epoxy (I can get a free sample from Chemtronics), but wasn't sure if it would work right since it is designed for repairing circuits on boards not connecting broken wires. If anyone has any other ideas on how to reconnect it, it would be great.

12-30-2001, 06:45 PM	#2
GigaFrog Cooling Neophyte Join Date: Nov 2001 Location: NorthWest (French & US) Posts: 88	The solder used for the junctions of a pelt are high temp, the risk of reflow is low. The wires are soldered with low temp solder, so that if your pelt overheats, the lead solder will reflow, the wires will them come off and the pelt will get disconnected, preventing meltdown of the junctions solder. The lead solder will reflow at a much lower temp than the junctions solder. The best would be to heat up the area where the lead was soldered, until solder reflows, then apply the wire lead and remove the soldering iron. It is strange that the lead came off like that. Probably a bad solder. __________________ Got water? Water cooled for 3 years. Safe with thermal switch. Now silent with fan thermostat.

12-31-2001, 03:38 PM	#3
Brad Thermophile Join Date: Oct 2001 Location: Nuu Zeeelin Posts: 3,175	just try to solder it back on, you've got nothing to lose

01-13-2002, 07:55 PM	#4
H2o Cooling Neophyte Join Date: Jan 2002 Posts: 7	where did you get the TEC? dangerden? if so, my friends TEC did the same thing, except his came broken in the package

01-13-2002, 11:19 PM	#5
compjunkie Cooling Neophyte Join Date: Nov 2001 Posts: 6	I bought it used from a guy on [H]ard, I ended up just buying a new one from dangerden because I could not get it to solder right.

01-14-2002, 06:10 PM	#6
Brad Thermophile Join Date: Oct 2001 Location: Nuu Zeeelin Posts: 3,175	one of my pelts blew up, looking back on it, it may just be the soldering..

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