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Siemens SIRIUS 3RW4454 Soft Starter - 551A @ 460V

Siemens SIRIUS Soft Starter, 551A (standard) / 954A (delta) @ 460V.

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ManufacturerSiemens

Part number3RW4454-6BC34

Standard Current (460V) 551 A

Inside-Delta Current (460V) 954 A

Max HP (460V) 450 hp

Control Voltage 200-460 V AC

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Veteran-owned

CAGE: 9NK75

Controlled Motor Starting Reduced Inrush Current Motor and System Protection 460V Operation 450hp Motor Capacity Screw Terminals

Product description

The Siemens SIRIUS Soft Starter (3RW4454-6BC34) is a robust device designed for controlled starting of three-phase motors. It offers standard starting current values of 551A and inside-delta starting currents of 954A at 460V, supporting motors up to 450hp. The control voltage range is 200-460V AC with screw terminals for secure connections. Please note this is a phased-out product.

This soft starter is critical for applications requiring reduced mechanical stress during motor start-up, such as conveyors, pumps, and fans, protecting both the motor and the driven equipment. It helps to minimize power surges and prolong the life of electrical components. It is designed for standard applications at 50°C ambient temperature.

Stanlo Automation, your veteran-owned source for industrial surplus, has the Siemens 3RW4454-6BC34 available. Find this phased-out soft starter and ensure your systems continue to run smoothly, with the assurance of quality from Stanlo.

Technical specifications

Standard Current (460V)	551 A
Inside-Delta Current (460V)	954 A
Max HP (460V)	450 hp
Control Voltage	200-460 V AC
Terminals	Screw
Ambient Temp	50 °C

Common applications

Pump Control

Fan Control

Conveyor Systems

Compressor Starters

Machine Tool Spindles

Industrial Automation

Compatible systems

Three-phase AC motors 200-460V AC control circuits SIRIUS system components

Also known as

Siemens SIRIUS Soft Starter 3RW4454 3RW4454 Soft Starter Siemens Motor Starter

Replaces / compatible with

This is a phased-out product. The preferred successor type is Siemens SIRIUS 3RW5552-6HA14. Always consult Siemens documentation for exact replacement compatibility.

Technical note

Expert tip

The 3RW4454-6BC34 has internal bypass contactors, which reduce heat loss during motor run operation, improving efficiency compared to older direct-on-line starters.

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Frequently asked questions

What is the successor to the Siemens 3RW4454-6BC34 SIRIUS soft starter?

The Siemens SIRIUS 3RW4454-6BC34 is a phased-out product. Its preferred successor is the Siemens SIRIUS 3RW5552-6HA14. While the 3RW5 series offers updated features, ensure your application requirements match the specifications of the new model.