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Siemens 3RW4423-1BC36 SIRIUS Soft Starter (Phased-Out)

Siemens SIRIUS soft starter, 32A (standard), 25hp (standard) at 575V.

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ManufacturerSiemens

Part number3RW4423-1BC36

Rated Current (Standard) 32 A

Rated Power (Standard) 25 hp

Rated Voltage 400-690 V AC

Control Voltage 115 V AC

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CAGE: 9NK75

Smooth motor start-up Reduced inrush current Screw terminal connections Suitable for 575V applications Phased-out product with successor available

Product description

The Siemens 3RW4423-1BC36 is a SIRIUS soft starter designed for smooth motor acceleration. It supports standard values at 575 V, 50 °C of 32 A and 25 hp, with inside-delta ratings of 55 A and 50 hp. It operates on 400-690 V AC and 115 V AC control voltage, featuring screw terminals. Please note this is a phased-out product with a preferred successor being the SIRIUS 3RW5524-1HA16.

Soft starters like this are crucial in applications requiring reduced mechanical stress on machinery, such as pumps, fans, compressors, and conveyors, helping to prolong equipment life and save energy by minimizing inrush current.

Stanlo Automation offers a reliable source for industrial automation parts, including Siemens components. As a veteran-owned business, we understand the critical need for dependable equipment and provide efficient service to keep your operations running.

Technical specifications

Rated Current (Standard)	32 A
Rated Power (Standard)	25 hp
Rated Voltage	400-690 V AC
Control Voltage	115 V AC
Terminals	Screw
Series	SIRIUS 44

Common applications

Pump control

Fan control

Compressor starting

Conveyor systems

General motor starting

Compatible systems

Siemens SIRIUS motor control systems

Also known as

Siemens SIRIUS 3RW44 soft starter 3RW44231BC36

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5524-1HA16. It replaces older soft starter models within the SIRIUS line.

Technical note

Expert tip

While phased out, this unit offers specific starting characteristics for older systems; ensure compatibility with control voltage before replacing.

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Frequently asked questions

What is the successor to the Siemens 3RW4423-1BC36?

The Siemens 3RW4423-1BC36 is a phased-out product. The preferred successor is the SIRIUS 3RW5524-1HA16. This ensures you can find modern alternatives for your motor control needs.