It carries a 21 A rating at 480 V under AC-3 duty, which is the standard category for squirrel-cage motors: starting, stopping, and running during service. The main contacts are configured as 3-pole normally open, with an auxiliary switch built in. Coil termination uses spring-type terminals — no screwdriver needed for the control wiring, which speeds up panel assembly and reduces torque-check steps.
The S0 frame footprint is 45 mm wide, 102 mm tall, and 97 mm deep — a standard slot in most motor control center buckets. That covers most panel layouts without derating, though the thermal curve above 40 °C ambient needs a look if you're packing multiple contactors in a sealed enclosure.
The headline rating is 21 A at 480 V AC-3 — that's the motor-switching current. For resistive loads (AC-1), the contactor can handle higher currents, but the AC-3 number is what governs motor branch-circuit sizing. The coil draws 10 A at 24 V rated value, stepping down to 0.3 A at 220 V — important for control transformer sizing and PLC output card selection. Switching frequency limits: 750 operations per hour under AC-3 duty, 250 per hour under AC-4 (plugging/reversing). Wire range: accepts 1 to 10 mm² solid or stranded for the power circuit, and 2x 0.5 to 2.5 mm² for the auxiliary circuit.