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Siemens SIRIUS 3RW4425-1BC34 Soft Starter - 51A/88A

Siemens SIRIUS 3RW4425-1BC34 Soft Starter.

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ManufacturerSiemens

Part number3RW4425-1BC34

Standard Rating 51A (30hp)

Inside-Delta Rating 88A (60hp)

Voltage 200-460V AC

Terminals Screw

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Soft Starting Integrated Bypass Torque Control 51A/88A Ratings Screw Terminals Phased-Out Product

Product description

The Siemens SIRIUS 3RW4425-1BC34 is a high-feature soft starter designed for soft starting and ramp-down of three-phase asynchronous motors. It offers standard ratings of 51A (30hp) and inside-delta ratings of 88A (60hp) at 460V, 50°C. The unit operates on 200-460V AC and features screw terminals.

This soft starter provides intelligent monitoring functions, an integrated bypass for compact construction and low heat dissipation, and torque control for ideal motor startup. It is suitable for applications requiring smooth motor acceleration and deceleration, reducing current peaks and mechanical stress.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4425-1BC34. Please note this is a phased-out product; a preferred successor is the SIRIUS 3RW5525-1HA14. Contact us for availability of this component for your critical applications.

Technical specifications

Standard Rating	51A (30hp)
Inside-Delta Rating	88A (60hp)
Voltage	200-460V AC
Terminals	Screw
Series	SIRIUS 3RW44

Common applications

Motor Control

Pumps

Fans

Compressors

Conveyor Systems

Industrial Machinery

Compatible systems

Three-phase asynchronous motors.

Also known as

Siemens SIRIUS Soft Starter 3RW4425-1BC34 3RW44 Series Soft Starter

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5525-1HA14.

Technical note

Expert tip

This product is phased out; consult the successor model 3RW5525-1HA14 for current availability and features.

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Frequently asked questions

What are the standard and inside-delta current ratings for the Siemens 3RW4425-1BC34 soft starter?

The Siemens SIRIUS 3RW4425-1BC34 soft starter has a standard rating of 51A (30hp) and an inside-delta rating of 88A (60hp) at 460V, 50°C.