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Siemens SIRIUS 3RW4458-6BC34 Soft Starter - Phased Out

Siemens SIRIUS 3RW4458-6BC34 soft starter (phased out).

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ManufacturerSiemens

Part number3RW4458-6BC34

Manufacturer Siemens

Part Number 3RW4458-6BC34

Series SIRIUS

Type Soft Starter

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Veteran-owned

CAGE: 9NK75

Smooth motor starting Reduces mechanical stress High overload capability Screw terminals for easy connection Phased-out product

Product description

The Siemens SIRIUS 3RW4458-6BC34 is a soft starter designed for smooth motor acceleration and deceleration. This phased-out product offers a standard rating of 850A at 50°C (750 hp) and an inside-delta rating of 1472A (1300 hp). It operates on a 200-460V AC input and features a 115V AC control circuit voltage with screw terminals.

This soft starter is suitable for applications where high starting torque is required without the mechanical stress associated with direct-on-line starting. It is commonly used in pumps, fans, compressors, and conveyors. Please note that this is a phased-out product, and its successor is the SIRIUS 3RW5 series, with the preferred replacement being the 3RW5556-6HA14.

Stanlo Automation, a veteran-owned surplus parts distributor, may have this or compatible successor parts available. Contact us for your Siemens SIRIUS soft starter needs and explore our inventory for industrial automation solutions.

Technical specifications

Manufacturer	Siemens
Part Number	3RW4458-6BC34
Series	SIRIUS
Type	Soft Starter
Standard Rating	850 A (460V, 50°C) / 750 hp
Inside-Delta Rating	1472 A (460V, 50°C) / 1300 hp
Control Voltage	115 V AC
Terminals	Screw

Common applications

Pump control

Fan control

Compressor starting

Conveyor systems

Material handling

Compatible systems

Compatible with standard 3-phase AC induction motors. Check wiring diagrams for specific motor and application suitability.

Also known as

SIRIUS 3RW4458-6BC34, Siemens Soft Starter, 3RW4458

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5556-6HA14. Ensure compatibility when replacing.

Technical note

Expert tip

As this is a phased-out product, verify that the successor 3RW5556-6HA14 meets all necessary technical and application requirements.

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Frequently asked questions

What is the successor to the Siemens SIRIUS 3RW4458-6BC34 soft starter?

The Siemens SIRIUS 3RW4458-6BC34 is a phased-out product. Its preferred successor is the Siemens SIRIUS 3RW5556-6HA14, part of the newer 3RW5 series.