SIRIUS Size S2 power contactor — 65 A at 480 V
The Siemens SIRIUS 3RT2037-1AN24 is a Size S2 power contactor rated for 65 A at 480 V in AC-3 duty — that's the motor-switching current, so it handles a 480 V three-phase motor load up to that ampacity.
Panel fit and clearances
Dimensions: 55 mm wide, 114 mm high, 174 mm deep. That 174 mm depth is the key dimension for gland-plate clearance and enclosure depth selection.
Switching performance and mechanical life
Arcing time 10–20 ms; closing time 10–18 ms. Mechanical life typical 10,000,000 operations. Maximum switching rates vary by duty: 800 cycles/hour AC-1, 700/h AC-3 and AC-3e, 400/h AC-2, 200/h AC-4. Main contact reliability figure: 18 to 1 million operations.
Auxiliary contact and coil ratings
No built-in auxiliary switch — this is a bare main contactor, so add a separate auxiliary contact block if needed. Coil draws 0.36 A at 50 Hz, 0.39 A at 60 Hz at 220 V. Auxiliary contact ratings across voltages: 6 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.
Current production lifecycle stage. No official successor has been announced; this is the active catalog number.