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Siemens SIRIUS 3RW4454-6BC44 Soft Starter - 615A, 355kW (400V)

Siemens SIRIUS soft starter, 615A (standard) / 1065A (in-delta) at 400V.

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ManufacturerSiemens

Part number3RW4454-6BC44

Rated Current (Standard) 615 A

Rated Power (Standard) 355 kW @ 400 V

Rated Current (Inside-Delta) 1065 A

Rated Power (Inside-Delta) 630 kW @ 400 V

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Smooth motor starting Reduced mechanical stress Reduced electrical stress High power ratings Screw terminal connections Part of the SIRIUS motor starter family

Product description

The Siemens SIRIUS soft starter, part number 3RW4454-6BC44, is designed for smooth motor start-ups. Under standard conditions at 40°C, it handles 615 A and is rated for 355 kW at 400 V. In an inside-delta connection, it can manage 1065 A and 630 kW. It operates on AC voltages from 200-460 V, with a 230 V AC control voltage, and features screw terminals for connection.

This soft starter is suitable for a wide range of motor control applications in industries such as material handling, pumps, fans, and compressors. It helps reduce mechanical stress on machinery and electrical stress on the power system during motor start-up, extending equipment life and improving system efficiency.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RW4454-6BC44. Although this is a phased-out product, we can help you find suitable alternatives like the SIRIUS 3RW5 series (e.g., 3RW5552-6HA14) or provide this component if available in our stock.

Technical specifications

Rated Current (Standard)	615 A
Rated Power (Standard)	355 kW @ 400 V
Rated Current (Inside-Delta)	1065 A
Rated Power (Inside-Delta)	630 kW @ 400 V
Voltage	200-460 V AC
Control Voltage	230 V AC
Terminals	Screw

Common applications

Motor control

Pump applications

Fan control

Conveyor systems

Compressors

Material handling

Industrial machinery

Compatible systems

AC induction motors Standard motor control circuits

Also known as

SIRIUS Soft Starter Siemens 3RW4454 3RW4454-6BC44 Siemens

Replaces / compatible with

This is a phased-out product. The preferred successor is the SIRIUS 3RW5552-6HA14.

Technical note

Expert tip

As a phased-out product, ensure availability and consider the successor 3RW5552-6HA14 for new installations or replacements requiring full manufacturer support.

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Frequently asked questions

What is the successor product for the Siemens SIRIUS 3RW4454-6BC44 soft starter?

The Siemens SIRIUS 3RW4454-6BC44 is a phased-out product. The preferred successor is the SIRIUS 3RW5552-6HA14. This soft starter is rated for 615 A (standard) or 1065 A (inside-delta) at 400V.