
Siemens 3RW4434-6BC35
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The Siemens SIRIUS 3RW4434-6BC35 soft starter is designed for reliable motor starting and protection in demanding industrial applications. Operating at 400–600 V AC with a control voltage of 115 V AC, this soft starter delivers a rated current of 100 A at 575 V, corresponding to 75 hp, and up to 173 A in inside-delta configuration for motors up to 150 hp.
As part of the proven Siemens SIRIUS range, this soft starter ensures smooth motor acceleration, reduced mechanical stress, and lower inrush current, contributing to extended motor and system lifetime. Screw terminals provide secure and practical installation in industrial control panels.
Please note that the 3RW4434-6BC35 is a phased-out product. For new installations or replacements, Siemens recommends the SIRIUS 3RW5 series, with the preferred successor type being 3RW5534-6HA16. This makes the unit primarily suitable for maintenance, service, or legacy system support where compatibility with existing installations is required.