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Siemens 3RW4422-1BC45 SIRIUS Soft Starter - 29A, 18.5kW

Siemens SIRIUS Soft Starter - 29A, 18.5kW, 400-600V AC (Phased-out).

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ManufacturerSiemens

Part number3RW4422-1BC45

Standard 29 A, 18.5 kW

Inside-delta 50 A, 30 kW

Voltage 400-600 V AC

Control Voltage 230 V AC

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SIRIUS soft starter Standard rating 29A Inside-delta rating 50A 400-600V AC operating voltage 230V AC control voltage Screw terminals

Product description

The Siemens 3RW4422-1BC45 is a SIRIUS soft starter with a standard rating of 29 A and 18.5 kW at 400-600V AC. In an inside-delta connection, it can handle up to 50 A and 30 kW. The control voltage is 230V AC, and it features screw terminals. This is a phased-out product, with the preferred successor being the SIRIUS 3RW5516-1HA15.

This soft starter is designed for smooth and controlled starting of medium to large industrial motors, offering excellent motor protection and reducing mechanical stress. It is suitable for demanding applications like pumps, fans, and compressors in various industrial settings.

Stanlo Automation, a veteran-owned surplus parts distributor, offers this Siemens soft starter. We are committed to providing reliable industrial automation components. If you need this part or a suitable replacement, contact us for assistance.

Technical specifications

Standard	29 A, 18.5 kW
Inside-delta	50 A, 30 kW
Voltage	400-600 V AC
Control Voltage	230 V AC
Terminals	Screw

Common applications

Motor control

Pump systems

Fan systems

Compressor control

Industrial applications

Also known as

Siemens SIRIUS 3RW44 soft starter

Replaces / compatible with

Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5516-1HA15<<

Technical note

Expert tip

Utilizing the inside-delta connection can increase the motor control capacity but requires specific wiring configurations.

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Frequently asked questions

What is the difference between the standard and inside-delta ratings for the Siemens 3RW4422-1BC45?

The Siemens 3RW4422-1BC45 soft starter has a standard rating of 29A for motors connected directly, and an inside-delta rating of 50A, which is used when the motor is connected in a Wye-Delta configuration for higher power output.