Twisted Pair Cable - UTP vs STP

Twisted Pair Cable is a type of wiring in which two conductors are twisted together to reduce crosstalk and cancel out electromagnetic interference (EMI). When looking for Twisted Pair Cable, you may find UTP (Unshielded Twisted Pair) and STP (Shielded Twisted Pair).


The main difference is STP comes with additional shielding.

STP, with its additional shielding, can have better noise and interference immunity,In exchange, the extra shielding raises its total cost and weight as compared to UTP cable. In your application, STP’s shielding must be properly terminated. If there is any problem in its shielding termination such as poor grounding or an open circuit, STP’s performance will be greatly affected. In addition, STP installation and maintenance requirements are relatively high.

In general, STP cable is often used in high end applications that require high bandwidth and outdoor environments. UTP cable is often used in home, office and large scale businesses.