Siemens SIRIUS 3RT2047-1NB30-1AA0 Power Contactor, 110A, 55kW, AC-3, 20-33V AC/DC, Size S3, Screw Terminals Original Brand New

Overview

The Siemens SIRIUS 3RT2047-1NB30-1AA0 is a high-performance, 3-pole power contactor designed for reliable switching of motors and other high-current loads up to 110 A (for AC-3/AC-3e at 400 V) and 55 kW. Part of the globally trusted SIRIUS 3RT2 series, this robust contactor features a wide-range electronic operating mechanism (20-33 V AC/DC) for universal control voltage compatibility and includes an integrated varistor for effective coil surge suppression. Its compact Size S3 design, combined with secure screw terminals, makes it ideal for industrial control panels requiring high switching capacity and minimal downtime.

Function and Application

The primary function of the Siemens 3RT2047-1NB30-1AA0 contactor is to remotely make and break electrical power circuits, most commonly used in:

• Direct On Line (DOL) Motor Starters: Switching 3-phase motors up to 55 kW at 400 V.
• Full-Voltage Non-Reversing (FVNR) Applications.
• Controlling resistive, inductive, and capacitive loads in industrial automation and low-voltage switching gear.
• Integration into switchboards and control cabinets for machinery, HVAC systems, pumps, and conveyors.

Benefit

• Reliable Performance: High mechanical and electrical endurance characteristic of the SIRIUS 3RT2 series ensures long-term operational reliability.
• Universal Control: The wide-range AC/DC coil voltage (20-33V) simplifies stock-keeping and wiring, offering flexibility in different control system environments.
• Enhanced Protection: Integrated varistor effectively suppresses voltage peaks (coil surges), protecting adjacent electronic components, PLCs, and the control system from damage.
• Space-Saving Design: The compact Size S3 footprint maximizes cabinet space efficiency while handling high current ratings.
• Secure Connection: Robust screw terminals ensure a strong, reliable connection for both main and auxiliary circuits.

For more industrial automation and control products, including the full range of Siemens SIRIUS contactors and switching devices, visit Turll today!