Siemens 3RT2027-4AK60 SIRIUS Power Contactor — S0 Frame, 480 V AC-3 27 A
The Siemens 3RT2027-4AK60 is a SIRIUS power contactor in the S0 frame size, rated for 27 A at 480 V in AC-3 duty — the standard motor-switching category per IEC 60947-4-1. That 27 A at 480 V is the rating that governs motor load switching; the contactor also carries a 5 hp rating at 230 V. The coil is 110 VAC at 50 Hz, 120 VAC at 60 Hz. Switching frequency: up to 1000 cycles/hour at AC-1, 750 at AC-2/AC-3/AC-3e, and 250 at AC-4. Arcing time is 10 ms.
Auxiliary Contact Ratings and Coil Connection
Its rated currents vary by voltage: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V, 2 A at 500 V. The magnet coil connection uses a ring cable lug.