1SAM250000R1009 MS116-6.3 MANUAL MOTOR STARTER, 3 POLE, 690VAC, 3 PHASE, 4-6.3A. he MS116-6.3 manual motor starter (also known as motor protection circuit breaker or manual motor protector) is a compact 45 mm width device with a rated operational current of Ie = 6.3 A. This device is used to manually switch on and off motors and to protect them reliably and without the need for a fuse from short-circuits, overload and phase failures.