SIEMENS 3RT1044-1A Product Description

The SIEMENS 3RT1044-1A is a SIRIUS classic 3-pole power contactor sized S3 for motor switching and industrial load control in automation cabinet systems. This power contactor features AC-3 rated 65A current and 30kW capacity at 400V, specially designed for direct on-line starting and stopping of three-phase induction motors. This power contactor adopts screw terminal connection for stable wiring and easy field assembly inside control cabinets. This power contactor can be fitted with optional auxiliary contact blocks and thermal overload relays to build a complete motor protection control unit.

This SIEMENS contactor delivers long mechanical service life and stable switching performance under repeated operation cycles. Its high endurance main contact assembly is manufactured with silver alloy material to resist electric arc erosion during frequent make-and-break operations. The main contact assembly maintains low contact resistance and prevents excessive heating under rated continuous load. The main contact assembly suppresses arc generation effectively to extend component lifespan during motor startup surge current. The robust structure of the main contact assembly reduces contact welding risks when handling heavy inrush current in pump and conveyor circuits.

The model supports modular combination with overload relays, surge suppressors and auxiliary switches to expand control functions. Reliable motor switching control realizes remote start and stop commands for fans, pumps, compressors and conveyor motors. Stable motor switching control isolates power circuit safely and cuts off load current immediately when emergency stop signal triggers. Flexible motor switching control integrates seamlessly with PLC output signals to build automatic production line logic. Secure motor switching control works together with protection devices to avoid motor burnout caused by overload or phase failure.

The SIEMENS 3RT1044-1A has IP20 front protection grade, preventing accidental touch of live terminals in control cabinets. It operates normally within ambient temperature range from -25°C to +60°C and allows installation altitude up to 2000 meters above sea level. The compact S3 frame design saves cabinet space and simplifies multi-device layout for panel builders. Surge suppressor accessories can be mounted to absorb coil back electromotive force and protect adjacent electronic control components. It fully complies with IEC 60947-4-1 international standard and carries CE certification for global industrial applications. Widely used in water treatment, chemical, packaging and material handling industries, this SIEMENS power contactor provides dependable low-voltage switching solutions for motor control circuits worldwide.