Hi Ken:
It is a mechanical process that occurs when two metals fuse to the point that are air tight due to pressure exerted on one against the other. One example is the pins of a press fit connector inside the barrels of a board. Hope this helps.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ken Patel
Sent: Tuesday, November 09, 2004 7:12 PM
To: [log in to unmask]
Subject: Re: [TN] Jumper Wire - Better insulation?
I never heard "cold-flow" word in my life (I am not EE!!??). Can someone
explain this to me?
Re,
Ken Patel
-----Original Message-----
From: COOKE, ROBERT W. (JSC-NX) (WGI) [mailto:[log in to unmask]]
Sent: Tuesday, November 09, 2004 8:31 AM
To: 'TechNet E-Mail Forum'; 'Ken Patel'
Subject: RE: [TN] Jumper Wire - Better insulation?
Ken,
For our applications, jumper wires are specified as solid, Teflon-insulated,
silver plated copper conductor (i.e.: wire wrap wire), although jumpers less
than 25mm (0.984 in.) may be uninsulated, provided the jumper is not liable
to short between lands or component leads, or cross over traces.
Type EE Teflon is rated at 1000V, +200C
Type E Teflon is rated at 600V, +200C
Type ET Teflon is rated at 250V, +200C
Standard kynar-insulated wirewrap wire, which has long been used as jumper
wire, is rated at 300V, +125C, and has good abrasion and cut-through
resistance. Tefzel is rated at 300V, +150C, and has good abrasion and
cut-through resistance, though cold-flow could be an issue.
If you have a design that routinely requires shorting / bridging links or
jumpers to hardwire-select options on the circuit board, there are zero-ohm
resistors available that are compatible with pick-and-place machines. They
are fairly expensive (compared to a regular resistor), but are required by
some customers that don't trust a piece of wire, and don't want to see any
thing on the board that looks "added".
Regards,
Bob
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ken Patel
Sent: Monday, November 08, 2004 5:44 PM
To: [log in to unmask]
Subject: [TN] Jumper Wire - Better insulation?
What different kind of jumper wire is available besides KYNAR as my boss is
looking for something thicker/better insulation than KYNAR?
Re,
Ken Patel
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