016 61
Zinc 0. Silver produces moderate diffusion
barrier. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels.5
Tin 0. The contacts are silver-plated,
with layer thickness pm.7.5
Copper 0.069 14.12 8.017 58
Brass (CuZn40) 0.028 36
Gold 0.5
Silver 0.4 The Specific Resistance and Conductivity Various
Materials
Table 4. brownish
sulphide layer easily develops its surface.7.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0. This can be
very important, especially for small currents and low voltages.2 Gold
The finest surfaces are created with gold plating.3
.023 43.4.061 16.
This surface protection used for aggressive environments.1 Silver
The conductivity silver excellent, better than gold fact.
4. The parts are immersed aqueous passivation emulsion.
4.067 15
Nickel 0.7.7.
4.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area. This
surface protection sufficient for almost all industrial connectors
applications
