Datasheet

186

UTS Series

Technical Information

Rated Current & Working Voltage

The current carrying capacity of a connector is limited by the thermal properties of materials used in its construction. The amount of current that

can be handled depends on the size of cable used, the ambient temperature and the heat that is generated inside the connector. Part 3 of the

IEC 60512 standard determines through a derating curve, the maximum current permissible, which varies from one layout to another (Fig.1 &

Fig.2). Wire size plays an important role in dissipating heat and avoid overheating (Fig.1 & Fig.3).

Please note that the curve should be adjusted when dealing with potential hot spots, which can occur as a result of unequal loading of current

across a number of contacts. As a general rule, it is best to avoid placing power handling contacts in the middle of the connector; try to locate

them towards the edge where heat can be dissipated more effectively. Eventually you should nd a level which represents the permissible

operating range:

The rated current is dened as uninterrupted continuous current that a connector can take when all contacts are energized simultaneously

without exceeding the maximum limit of temperature. The earth contact is never loaded.

0 20 40 60 80 100 120

Current (A)

Ambient Operating Temperature (°C)

Fig.1:UTS12-4–1.5mm²wires

0 20 40 60 80 100 120

Current (A)

Ambient Operating Temperature (°C)

Fig.2:UTS12-8–1.5mm²wires

Current use

Limited use

Not recommended use

0 20 40 60 80 100 120

Current (A)

Ambient Operating Temperature (°C)

Fig.3:UTS12-4–2.5mm²wires

Current Carrying Capacity