THREE-PHASE THERMAL MAGNETIC MOTOR PROTECTIVE DEVICE ADJUSTABLE FROM 6.3-11 AMPS............The PKZM family features adjustable bi-metal thermal trips and a fixed magnetic trip of 14x rated uninterrupted current. This provides superior protection for standard and high efficiency motors. The PKZM0-T version has a fixed magnetic trip of 20x times rated uninterrupted current, providing optimal protection for today