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Reply To: | TechNet E-Mail Forum. |
Date: | Tue, 15 Jun 2004 11:54:08 -0700 |
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Ofer,
I would be very cautious using ENIG for the 60A circuit.
Even .1 ohm could cause an explosion (P = I2R = 360 Watts)!!
Use electrolytic gold for this one!
David A. Douthit
Manager
LoCan LLC
Ofer Cohen wrote:
>Techneters,
>I have to decide on a lead-free coating for a PCB. My natural tendency (based on previous experience) is to use immersion tin. There is one major issue - the PCB surface is in contact with bronze surface for safety grounding. How will the immersion tin behave along time?
>
>In another instance I selected ENIG, because the surface contact is used as a power conductor, and will conduct continuously 60A on an area of 220 square mm (~.35 square "). Will the surface contact withstand this current? Is gold plating better for this application?
>
>Regards
>Ofer Cohen
>Seabridge Ltd. - A Siemens Company
>
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