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Siemens 3RW4423-1BC35 SIRIUS Soft Starter - 32A, 25hp

Siemens SIRIUS Soft Starter - 32A, 25hp, 400-600V AC (Phased-out).

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ManufacturerSiemens

Part number3RW4423-1BC35

Standard 32 A, 25 hp

Inside-delta 55 A, 50 hp

Voltage 400-600 V AC

Control Voltage 115 V AC

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SIRIUS soft starter Standard rating 32A Inside-delta rating 55A 400-600V AC operating voltage 115V AC control voltage Screw terminals

Product description

The Siemens 3RW4423-1BC35 is a SIRIUS soft starter rated for 32 A and 25 hp at 575V (50 deg. C). In an inside-delta configuration, it handles 55 A and 50 hp. It operates on 400-600V AC and uses a 115V AC control voltage, with screw terminals. This is a phased-out product; the preferred successor is the SIRIUS 3RW5517-1HA15.

This soft starter is designed for smooth acceleration of industrial motors, reducing mechanical stress and electrical surges. It's suitable for high-power applications in industries such as manufacturing, mining, and material handling, providing essential motor protection.

Stanlo Automation, a veteran-owned surplus parts distributor, provides this Siemens soft starter. We offer quality components to support your industrial automation needs. Contact us for this part or its successors to ensure system continuity.

Technical specifications

Standard	32 A, 25 hp
Inside-delta	55 A, 50 hp
Voltage	400-600 V AC
Control Voltage	115 V AC
Temperature	50 deg. C

Common applications

Motor control

High-power applications

Industrial machinery

Manufacturing

Mining

Material handling

Also known as

Siemens SIRIUS 3RW44 soft starter

Replaces / compatible with

Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5517-1HA15<<

Technical note

Expert tip

This starter is well-suited for high-inertia loads where a smooth, controlled acceleration ramp is crucial to prevent system shock.

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Frequently asked questions

What is the inside-delta current rating for the Siemens 3RW4423-1BC35 soft starter?

The Siemens 3RW4423-1BC35 soft starter has an inside-delta current rating of 55A, which is used for higher horsepower motors when the motor windings are connected in a delta configuration during starting.