Page 595 - Wago_PCB_TerminalBlocksConnectors_Volume2_2015_US

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• Minimum Current / Special Connector Applications

The contact surfaces of WAGO connectors are tin-plated. This surface exhibits excellent conductivity, along with outstanding pro-
tection against corrosion. Pollution layer deposits may penetrate this pure tin coating when the contacts are connected, providing
low contact resistance.

The following information regarding proper selection of suitable WAGO components should be taken into account for applica-
tions in which connectors are used with minimal current and voltage levels and under special conditions, involving, for example,
temperature, aggressive gases, vibration, shock, etc.

Signal corruption may occur in applications with minimal current and voltage levels under the special conditions cited above. In
such cases, we recommend using gold-plated contacts. Here, the user must always examine the suitability of the connectors for
the application at hand.

The diagram below is based on practical experience.

U
WAGO also offers connectors with
gold-plated contacts upon request.
Tin

100 mV
Gold

10 mA I
Fig.: Selection of surface properties for special conditions

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