Square D Starter, Type S, 600 V AC, 18 A, 50/60 Hz, 3 hp/5 hp Motor, 110/120 VAC Coil, 3 Pole, (3) Thermal Melting Alloy Reset, 3 ph, Screw Clamp, Non-Reversing, Thermal Melting Alloy Overload Relay, Open, Starting Modes: Magnetic, 3.5 in W x 4.21 in D x 6.77 in H