Technical Information


Don’t connect or disconnect HUMMEL Connectors under load.


Nominal Currrent:
Allowable current (Amp), that can be transmitted by each contact continuously and simultaneously.


Nominal Voltage:
Allowable voltage (Volt), that can be applied to each contact continuously and simultaneously.


Test Voltage
Voltage which, under certain conditions, a connector can be exposed to without breakdown.


Degree of Protection:
Potential dirt accumulation of a disconnected connector in a certain environment.


Degree of Protection 2:
No permanent conductive dirt accumulation will occur. Temporary conductive dirt accumulation, such as condensation, is possible. Typical for households, offices, laboratories and test labs.


Degree of Protection 3:
Conductive, as well as dry non-conductive dirt accumulation can occur. It can be temporarily conductive due to condensation. Typical for industrial and factory environments.


Additional remarks (pollution level):
If connectors being defined for pollution degree 1 and overvoltage category 1 are applied for other conditions (higher pollution degree and higher overvoltage category) voltages level reduce correspondingly. But the connectors can be used without any problems at reduced maximum voltages.


Mating cycles:
Mating cycles are the number of insertion and extraction cycles a connector can withstand before the electrical or mechanical failure in relationship to the connector’s design specification.


Air gap:
The minimum gap of air between two conducting surfaces permissible at given voltage.


Creep distance:
The minimum dimension along the surface of an insulating material between two conducting surfaces.


The PE-Contact is a ground contact for security reasons.

Safety Guidelines

When Hummel connectors are used for voltages greater than 50 Volts with conductive shell components they must be used in accordance with the safety regulations DIN VDE Part 410; IEC 60364-4-41. This regulation basically dictates that the power source should be turned off before mating and unmating connector. This regulation does not provide protection against electrical shock when mating and unmating connectors in the field.