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Printed Circuit Board Connectors

Electronic Module Design Recommendations

Deutsch connectors are designed to handle all environmental conditions typically seen on heavy duty equipment. Design

considerations have been given for temperature, vibration, and high current levels to exist simultaneously in a connector

with no performance degradation.

Applications with data input/output signals of 0 to 5 volts require special consideration in the terminal selection. The pri-

mary concern is ensuring the low voltage signal is carried through the circuit. To minimize signal degradation, select a gold

plated terminal. Gold is a better plating choice for 0 to 5 volt applications because it does not oxidize and easily conducts

lower voltage signals. Nickel and tin platings are not designed for voltage levels less than 5 volts. Terminals plated with

nickel and tin will over time form a layer of oxidation on the surface of the plating that only higher voltage signals are able

to break through. The small additional cost for the gold terminal can dramatically improve the reliability of the electronic

system.

 Low Voltage Circuits

 Air Tight Connections

In some applications, it is important to prevent air from

penetrating electronic enclosures. Air can bring in water

vapor and create condensation on the printed circuit

board. To prevent this from happening, potting or a light

conformal coating can be applied to the board.

Another method for protecting against air penetration

is to seal the enclosure after it is assembled and tested.

One drawback to consider is accommodating the con-

nector interface. The flange seal prevents air penetra-

tion at the flange, but there is still a possibility for air to

enter through the pin terminal area. Deutsch has several

designs that offer a seal around the terminal. This can

prevent any air penetration through the connector up to

a 5 p.s.i. pressure differential. Consult a Deutsch repre-

sentative for additional assistance.