NEW ARRIVAL: Siemens SIRIUS 3RW4046-1TB04 Soft Starter Available Immediately

2025-12-01

Model Description

We are pleased to announce the immediate availability of the Siemens SIRIUS 3RW4046-1TB04 soft starter, a sophisticated AC semiconductor motor starting solution designed for smooth acceleration of three-phase asynchronous motors. This 3RW40 series device handles currents up to 80A at 400V AC, making it ideal for controlling motors up to 45kW in industrial applications. The integrated bypass contactor eliminates the need for external contactor installation, reducing panel space and wiring complexity. The unit features Class 10 motor overload protection with adjustable current settings from 32A to 80A, accommodating a wide range of motor HP ratings. Control voltage options include 115V AC and 230V AC for versatile integration with existing control circuits. The compact housing mounts on standard 35mm DIN rails and features screw terminals for secure power and control connections, supporting conductor cross-sections from 0.5 to 25 mm² for power terminals.

Key Features

The 3RW4046-1TB04 delivers exceptional motor starting performance with comprehensive protection features. The soft starter provides adjustable ramp-up time from 0 to 20 seconds and initial voltage from 30% to 100% of rated voltage, enabling customized starting profiles for mechanical load characteristics. Integrated bypass contactor engagement occurs automatically at 85% of rated speed, eliminating thyristor heat generation during continuous operation and improving energy efficiency. Motor protection functions include phase imbalance detection, motor overtemperature evaluation via thermistor inputs, and under-voltage monitoring. The device withstands short-circuit currents up to 100kA with type 2 coordination when combined with appropriate fuses. Operating temperature range spans -25°C to +60°C, with storage capability from -60°C to +80°C. IP20 protection rating ensures safe panel installation, while compliance with IEC 60947-4-2, UL, and CSA standards validates global deployment. The starter reduces mechanical stress on motors, gearboxes, and driven equipment by limiting starting current to 4-6 times rated current.

Related Models in the SIRIUS 3RW40 Series

The SIRIUS 3RW40 family offers scalable soft starting solutions for diverse motor applications. The 3RW4047-1BB04 provides 106A capacity for 55kW motors, while 3RW4046-1BB04 offers identical 80A rating with 24V DC control coil for DC control circuits. The 3RW4045-1TB04 supplies 65A capacity for 37kW applications, and 3RW4048-1TB04 extends capability to 135A for 75kW motors. For applications with integrated overload relay, the 3RW4046-1BB04 features internal motor protection evaluation. Customers requiring communication capability can select 3RW4056-6BB44 with integrated PROFIBUS DP module. The 3RW4046-2TB04 variant provides alternative terminal configurations. All models share identical ramp control algorithms, protection functions, and mounting dimensions, enabling standardized panel design across varying motor power requirements while optimizing control voltage and current ratings for specific applications.

Our Competitive Advantages

As a specialized Industrial Automation trader, we deliver unmatched supply chain responsiveness and procurement flexibility. Our versatile payment solutions accommodate wire transfer arrangements and customized credit terms for qualified customers, streamlining purchasing workflows. We maintain substantial strategic inventory in regional distribution hubs, enabling delivery within 5-7 business days to major industrial markets worldwide. Our extensive sourcing network spans premium European and Asian distribution channels, ensuring authentic Siemens component traceability without single-supplier constraints. This multi-channel approach guarantees availability even during manufacturer stock constraints. Our technical specialists provide application consultation on mechanism selection, installation guidance, and compatibility verification. Through optimized logistics and direct manufacturer partnerships, we eliminate unnecessary intermediaries while accelerating order fulfillment, making us the preferred solution provider for urgent panel assembly and maintenance projects.

For immediate quotations or technical consultation, please contact our dedicated sales team.

About Us

We are a dedicated industrial automation components trader focused on delivering authentic Siemens SIRIUS signaling solutions with rapid response, financial flexibility, and technical competence.