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Siemens SIRIUS Soft Starter 3RW4423-3BC44 (Discontinued)

Siemens SIRIUS Soft Starter 3RW4423-3BC44 (Discontinued).

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ManufacturerSiemens

Part number3RW4423-3BC44

Standard Rating (400V, 40°C) 36 A, 18.5 kW

Inside-Delta Rating 62 A, 30 kW

Voltage 200-460 V AC

Terminals Spring-type (230V AC)

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Controlled motor acceleration Reduced inrush current Reduced mechanical stress Spring-type terminals Phased-out product

Product description

The Siemens 3RW4423-3BC44 is a SIRIUS soft starter designed for controlled motor acceleration. It offers standard ratings of 36 A and 18.5 kW at 400 V and 40 °C, with inside-delta ratings of 62 A and 30 kW. The unit operates on AC voltages from 200-460 V, with spring-type terminals for 230 V AC connections.

This specific model is a phased-out product. The recommended successor is the SIRIUS 3RW5 series, with the preferred successor type being 3RW5517-3HA14. Soft starters are crucial for reducing mechanical stress on machinery and electrical inrush current during motor startup.

Stanlo Automation, a veteran-owned surplus distributor, can help you source parts like the Siemens 3RW4423-3BC44, or its modern equivalents. We specialize in providing reliable industrial automation components for your operational needs.

Technical specifications

Standard Rating (400V, 40°C)	36 A, 18.5 kW
Inside-Delta Rating	62 A, 30 kW
Voltage	200-460 V AC
Terminals	Spring-type (230V AC)
Product Status	Phased-out

Common applications

Motor starting

Pump control

Fan control

Conveyor systems

Industrial machinery

HVAC systems

Compatible systems

Suitable for 200-460V AC motor control applications

Also known as

SIRIUS 3RW44 Siemens soft starter

Replaces / compatible with

Phased-out product. Successor is SIRIUS 3RW5. Preferred successor type is 3RW5517-3HA14.

Technical note

Expert tip

As this is a discontinued product, consider the 3RW5 series for new installations or replacements requiring full manufacturer support and updated features.

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Frequently asked questions

What is the successor to the Siemens 3RW4423-3BC44 soft starter?

The Siemens 3RW4423-3BC44 is a phased-out product. Its successor is the SIRIUS 3RW5 series, with the preferred successor type being the 3RW5517-3HA14.