Mach-1™ Bi-directional SSCMach 1 Bi directional Solid State Contactor is not polarity sensitive. They can be used for both AC and DC applications up to 1500V, and 300A. Sample applications include Timer Interrupt Cathodic Protection Systems, ACGV, DCGV and other corrosion prevention applications. Features and Selection Guide Bi directional solid state switching No moving parts, arc free and noise free PLC TTL CMOS Input Options MTBF 3 million hours Made in Canada,