Siemens SIRIUS 3RT1025-1AV00-0TA0 — Size S0 Power Contactor, 3 NO, 400 V 50 Hz
Motor ratings and duty cycles
For motor switching, this contactor is rated at 10 kW at 500 V and 11 kW at 690 V, covering the common European 400 V and 690 V industrial supply voltages. For resistive loads (AC-12), the maximum operating current is 10 A.
Main current circuit connections use screw-type terminals. The solid conductor capacity accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). For stranded conductors, the range is 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), and up to 2x 10 mm². AWG equivalents for main contacts are 2x (16 to 12), 2x (14 to 10), and 1x 8. These ranges cover the vast majority of motor feeder cables up to about 4 mm² per phase — no need for lug adapters on standard runs.
This distinction is critical for panel designers deciding whether the contactor must survive a fault without replacement.
The contactor occupies a 45 mm width, 85 mm height, and 91 mm depth footprint.