4. This
surface protection sufficient for almost all industrial connectors
applications.3 Nickel
A 5-pm layer nickel applied protect large-surface parts, such earth
panels. The contacts are silver-plated,
with layer thickness pm.017 58
Brass (CuZn40) 0.067 15
Nickel 0.5
Copper 0.3
.12 8.1 Silver
The conductivity silver excellent, better than gold fact. Silver produces moderate diffusion
barrier.21:
176 ____________________________________________________________
Material Specific resistance Conductivity in
Ohm mm2 m
in Ohm mm2
Aluminium 0.
4.4.4 The Specific Resistance and Conductivity Various
Materials
Table 4. The parts are immersed aqueous passivation emulsion.023 43. The brass contacts are first
plated with 3-pm nickel layer (diffusion barrier) then with 2-pm gold
layer the contact area.061 16.7.5
Tin 0.028 36
Gold 0. This can be
very important, especially for small currents and low voltages. brownish
sulphide layer easily develops its surface.7.016 61
Zinc 0.7.7.5
Silver 0.2 Gold
The finest surfaces are created with gold plating.
Due the thinness the layer, the poor electrical conductivity nickel is
insignificant. The electrical
conductivity gold significantly less than that silver, but due its
constant contact resistance, used special applications.069 14.
This surface protection used for aggressive environments.
4
