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Siemens SIRIUS 3RW44 Soft Starter - 82A, 60HP

Siemens SIRIUS soft starter for 60hp/100hp motors.

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ManufacturerSiemens

Part number3RW4427-3BC34

Standard Rating (460V, 50°C) 82A, 60 hp

Inside-Delta Rating 142A, 100 hp

Voltage 200-460 V AC

Control Voltage 115 V AC

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12-month warranty

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Same-day dispatch

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Worldwide delivery

US, EU, Asia, Middle East

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Veteran-owned

CAGE: 9NK75

Smooth motor start-up Reduced inrush current Mechanical stress reduction Wide voltage range Spring-type terminals

Product description

The Siemens 3RW4427-3BC34 is a SIRIUS soft starter designed for smooth and controlled motor acceleration. Under standard conditions at 50°C, it can handle 82A and 60 hp motors, while in an inside-delta configuration, it supports 142A and 100 hp motors. It operates with a voltage range of 200-460 V AC and features 115 V AC control voltage with spring-type terminals for easy connection.

This soft starter is ideal for applications where frequent motor starts and stops occur, reducing mechanical stress and electrical inrush current. Industries benefiting from this technology include conveyor systems, pumps, fans, and compressors, helping to extend equipment life and improve energy efficiency.

Stanlo Automation, a veteran-owned distributor, offers this Siemens 3RW4427-3BC34 soft starter. As a phased-out product, securing reliable inventory is crucial for maintenance and replacement. We provide access to these essential components, ensuring your industrial operations continue without interruption.

Technical specifications

Standard Rating (460V, 50°C)	82A, 60 hp
Inside-Delta Rating	142A, 100 hp
Voltage	200-460 V AC
Control Voltage	115 V AC
Terminals	Spring-type
Product Status	Phased-out

Common applications

Pump control

Fan control

Conveyor systems

Compressor control

Motor soft starting

Compatible systems

3AC motors (200-460V)

Also known as

SIRIUS 3RW44 soft starter Siemens 3RW4427

Replaces / compatible with

Phased-out product. Successor is SIRIUS 3RW5 series, with 3RW5527-3HA14 as the preferred successor type.

Technical note

Expert tip

This unit is phased out; ensure compatibility with successor models or maintain spare parts inventory for existing installations.

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Frequently asked questions

What is the successor to the Siemens 3RW4427-3BC34 soft starter?

The Siemens 3RW4427-3BC34 is a phased-out product. Its successor is the SIRIUS 3RW5 series, with the preferred successor type being the 3RW5527-3HA14.