Not quite up to date

Positive at the terminals of the series UT and UK from Phoenix Contact was very well executed shock protection:
The screws are relatively low, and also the introduction of the conductors are not violable readily the
Top fastened screw bridges reduced the security not much.

NEGATIVE

A disadvantage is the poor visibility of the connections. In this respect many of today's better terminals with the above introduction.
The screws have an alloy with electrically probably very good properties at Phoenix Contact. However, this was
at the expense of the mechanical resistance of threads and screw heads: Excessive tightening torques or wrong screwdriver sizes
often attracted unsightly damage to itself.

Next was not always advantageous to the symmetrical profile rail towards the center of the form.
The terminals could be built facing the wrong way, saying "the open sides facing each other." This led (not always immediately)
to undesirable short circuits. At present, asymmetrischeren versions this confusion is less pronounced.

Especially the relatively soft material made a Re-tightening necessary if machines and equipment for long-distance transport
were put into operation. By today's spring or blade terminals to this issue is superfluous.

Although the associated ground terminals ("USLKG") also had a universal applicability for different profile rails. But as soon as the
Section was deformed, these terminals could be initially tightened it - and "jumped" then down.

This type of terminals had justified at that time. Today, however, there are better alternatives, which are more reliable and easier to use.