The Siemens SIRIUS 3RT2027-4AC20 is a size S0 power contactor with a 24 VAC coil rated for both 50 Hz and 60 Hz. The headline rating here is 27 A at 480 V — that's the AC-3 motor-switching current, so it handles a 3-phase motor load up to that level without welding the contacts.
The S0 frame is 45 mm wide, 85 mm tall, 97 mm deep — a standard footprint that fits alongside other SIRIUS S0 gear on the same DIN rail. The coil connection uses a ring cable lug. Mounting position is flexible: +/-180° rotation on a vertical surface, and can be tilted forward/backward by +/-22.5°. Operating temperature range is -25 to +60 °C; storage from -55 to +80 °C.