Siemens 3RT2046-1NF34 — SIRIUS S3 Power Contactor
The Siemens 3RT2046-1NF34 is a SIRIUS-brand power contactor in the S3 frame size, designed for screw-and-snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715. It carries a coil rated at 83-155 V, drawing 3.5 VA at both 50 Hz and 60 Hz, with an inrush current peak of 1.5 A. The main contacts are screw-type terminals accepting solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm².
Duty Ratings and Switching Frequency
Switching frequency varies by duty class: 900 operations per hour at AC-1 (resistive), 850 at AC-3 and AC-3e (squirrel-cage motor starting), 350 at AC-2 (slip-ring motor), and 250 at AC-4 (plugging/inching). The arcing time is 10-20 ms, and the operating time (both AC and DC) is 38-57 ms. These ratings define the thermal cycling limits for the contactor in a given application — AC-3 is the typical motor-switching duty, and the 850 ops/h ceiling means it handles moderate cycling on a conveyor or pump without exceeding thermal rise limits.
Mounting and Clearance
Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715. The mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward.
Auxiliary Contacts and Environmental Range
An auxiliary switch is included. Its rated values at different voltages: 6 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The contactor is rated for a full-scale value of 1.1 (likely the rated operational current multiplier for overload conditions) and an initial value of 0.8 (possibly the pick-up voltage threshold relative to rated).