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Siemens 3RW4073-6BB34 SIRIUS Soft Starter - Phased Out

Siemens 3RW4073-6BB34 SIRIUS Soft Starter (Phased-Out)

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ManufacturerSiemens

Part number3RW4073-6BB34

Current Rating 120 A

Motor Power 150 hp @ 460 V

Control Voltage 200-460 V AC

Ambient Temp 50°C

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Reduced starting current Smooth motor acceleration Integrated overload protection Screw terminal connections SIRIUS design

Product description

The Siemens 3RW4073-6BB34 is a SIRIUS soft starter designed to reduce the starting current and torque of electric motors, preventing mechanical stress and electrical surges. This unit is rated for a 120 A continuous current and is suitable for motors up to 150 hp at 460 V, operating within a 200-460 V AC control voltage range and a 50°C ambient temperature. It features screw terminals for connection and is now a phased-out product.

Soft starters like this are commonly used in applications where smooth motor start-up is crucial, such as in pump systems, fan applications, compressors, and conveyor belts. They protect motor windings and mechanical components during the initial acceleration phase.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4073-6BB34. While this product is phased out, we can help you source this or its recommended successor, the Siemens 3RW5073-6AB14, ensuring your systems remain operational.

Technical specifications

Current Rating	120 A
Motor Power	150 hp @ 460 V
Control Voltage	200-460 V AC
Ambient Temp	50°C
Terminals	Screw
Product Status	Phased-Out

Common applications

Pump Control

Fan Systems

Conveyor Belts

Compressors

Industrial Machinery

Motor Starting

Compatible systems

AC Induction Motors Standard 3-phase motors Siemens control systems

Also known as

Siemens SIRIUS Soft Starter Siemens 3RW40 Soft Starter Motor Soft Starter

Replaces / compatible with

Phased-out product. Successor is SIRIUS 3RW5. Preferred successor type is 3RW5073-6AB14.

Technical note

Expert tip

Ensure correct wiring and matching of motor parameters to the soft starter settings for optimal performance and protection.

What happens next?

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Frequently asked questions

What is the recommended successor for the Siemens 3RW4073-6BB34 soft starter?

The Siemens 3RW4073-6BB34 is a phased-out product. The preferred successor recommended by Siemens is the SIRIUS 3RW5073-6AB14 soft starter, offering updated features and technology.