The PAA150STR Series of transient surge suppressors are metal-oxide varistors (MOVs) featuring a rigid base mount package construction, and are useful in applications which are subject to vibration.The UL and CSA recognized varistors are available in awide range of operating voltages, from 130V to 660 V V M(AC)RMS. The base-mount package has a quick-connect tab terminal that provides a fast, secure lead attach. The mounting base forms the second electrical connection, usually chassis ground.Meeting rigid NEMA standards, PAA150STR series varistors have a creep and strike distance capability that minimizes breakdown along the package surface.