SIRIUS S0 power contactor — 3RT2027-4AG60
Its headline AC-3 rating is 27 A at 480 V — that's the motor-switching current it handles without welding the main contacts during normal starting and stopping. The S0 frame keeps the width at 45 mm, height 85 mm, depth 97 mm, so it fits standard 45 mm-wide DIN-rail slots alongside other motor starters.
The 27 A at 480 V AC-3 rating is the one that decides whether this contactor fits a given motor branch. AC-3 covers squirrel-cage motors: making and breaking during running, with infrequent plugging or inching. The 3RT2027-4AG60 also carries an AC-1 (resistive load) maximum of 1 000 switching cycles per hour, AC-3 at 750 cycles/h, and AC-4 (plugging/reversing) at 250 cycles/h — so if your application does frequent reversing, you'll want to check the thermal duty cycle against your actual load profile. Auxiliary contact ratings span from 10 A at 24 V up through 3 A at 400 V and 0.6 A at 440 V, all at 50/60 Hz; the 480 V auxiliary rating is 27 A (likely the main pole rating repeated for the auxiliary circuit, so verify the auxiliary contactor's own 480 V rating separately).
Coil connection is a ring cable lug, so you'll need ring terminals on the control wiring — no push-on or screw-clamp coil spade.