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Siemens 3RW4426-1BC35 SIRIUS Soft Starter - Phased Out

Siemens 3RW4426-1BC35 SIRIUS soft starter.

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ManufacturerSiemens

Part number3RW4426-1BC35

Voltage 400-600 V AC

Control Voltage 115 V AC

Standard Current 68 A (575V, 50°C)

Inside-Delta Current 118 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Controlled motor acceleration Reduced start-up stress Overload protection Energy efficiency Screw terminal connections High reliability

Product description

The Siemens 3RW4426-1BC35 is a SIRIUS soft starter designed for reliable and controlled motor starting. It delivers 68 A at 575 V (50°C standard) and 118 A inside-delta, with power ratings of 50 hp and 100 hp respectively. This unit is designed for 400-600 V AC power supply and utilizes 115 V AC for its control circuits, featuring screw terminals.

This soft starter is ideal for applications where smooth acceleration is crucial, such as in heavy machinery, large pumps, and industrial fans. Its function is to minimize the initial inrush current and torque, thereby extending the life of motor and connected equipment. It finds use in sectors like manufacturing, oil and gas, and material processing.

Stanlo Automation, a veteran-owned business, specializes in providing surplus and hard-to-find industrial automation parts. We offer the Siemens 3RW4426-1BC35, a discontinued but capable soft starter, ensuring you can maintain your existing infrastructure without compromise. Trust Stanlo Automation for your critical component needs.

Technical specifications

Voltage	400-600 V AC
Control Voltage	115 V AC
Standard Current	68 A (575V, 50°C)
Inside-Delta Current	118 A
Standard Power	50 hp (575V, 50°C)
Inside-Delta Power	100 hp
Terminals	Screw

Common applications

Industrial motor control

Heavy machinery

Pump systems

Fan applications

Manufacturing plants

Oil and gas industry

Compatible systems

Siemens SIRIUS motor control systems

Also known as

Siemens SIRIUS 3RW44 soft starter 3RW4426 soft starter Siemens 68A soft starter

Replaces / compatible with

This product is phased out. The preferred successor is the Siemens 3RW5526-1HA16.

Technical note

Expert tip

While phased out, this unit offers robust performance for applications requiring significant motor starting torque and current control. Ensure proper heat dissipation in enclosed panels.

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Frequently asked questions

What are the power and current ratings for the Siemens 3RW4426-1BC35?

The Siemens 3RW4426-1BC35 soft starter is rated for 68A (standard) and 118A (inside-delta) at 575V (50°C). This corresponds to 50hp and 100hp motor power respectively. It operates on 400-600V AC.