Datasheet

Material properties
The metal parts of the UT... screw
connection terminal blocks are made from
high-grade, strain-crack, and corrosion-
proof copper alloys as a standard feature.
This eliminates the possibility of electrolytic
corrosion in the presence of moisture and
the risk of rusting. The consequences, such
as unreliable electrical contacts and/or
jammed screws, are also prevented.
Another advantage is the low temperature
rise due to good electrical conductivity. The
surface of the metal parts is protected by
lead-free, galvanic nickel or tin plating.
The insulating housing of the UT... screw
connection terminal blocks is made from
recyclable PA6.6. This elastic plastic with
high impact strength is halogen-free and UV
resistant. Further characteristics include the
good tropical and termite resistance, high
chemical resistance, and excellent aging
characteristics. Polyamide 6.6 can be used
with operating temperatures up to
130°Cand is certified for inflammability
class V0 according to UL94.
Connection principle
UT... screw connection terminal blocks
are designed for the most stringent
requirements. For more than 80 years, they
have proven themselves a billion times over
in all applications. An important
characteristic is the maintenance-free
conductor connection. There is no need to
tighten the terminal block screws. The
screws are prevented from loosening by the
Reakdyn principle, a screw locking
technique developed by Phoenix Contact.
Phoenix Contact UT... screw connection
terminal blocks can be clamped without any
pretreatment. Splicing protection can also
be implemented in the form of ferrules. A
special characteristic of the screw clamping
body is the multi-conductor connection,
which is often required.
Very large conductor cross sections up to
240mm can also be wired gas-tight and
with long-term stability thanks to the high
contact forces.
System features - screw connection
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