SIRIUS S3 Power Contactor — 3RT1446-6BB46-ZX95
The Siemens 3RT1446-6BB46-ZX95 is a SIRIUS S3 power contactor, rated for motor switching up to 38.2 kW at 690 V AC-3 and 29.9 kW at 500 V. The 24 VDC coil holds at 10 A, with pickup at 0.8x rated voltage and dropout at 1.1x. Screw-type terminals for both main and auxiliary circuits.
Panel Fit and Mounting
Snap-on mounting onto 35 mm or 75 mm standard DIN rail, with screw fastening as an option. Side-by-side mounting permitted without derating for heat buildup. Dimensions: 152 mm depth, 90 mm width, 146 mm height. Pollution degree 3 rating means it tolerates conductive dust in industrial enclosures.
Wire Termination and Temperature Derating
Main circuit screw terminals accept solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²); AWG range 7–1/0. At 40 °C ambient, minimum permissible conductor size is 50 mm²; at 60 °C, 35 mm². Operating temperature range -25 to +60 °C; storage -55 to +80 °C.