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Siemens SIRIUS 3RW4435-2BC45 Soft Starter (Phased Out)

Siemens SIRIUS 3RW4435-2BC45 soft starter for motor control.

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ManufacturerSiemens

Part number3RW4435-2BC45

Manufacturer Siemens

Part Number 3RW4435-2BC45

Series SIRIUS

Voltage 400-600 V AC

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Smooth Motor Start Reduced Inrush Current Mechanical Stress Reduction Spring-Type Terminals 400-600V AC Operation Phased-Out Model

Product description

The Siemens SIRIUS 3RW4435-2BC45 is a soft starter designed for controlled starting of three-phase motors. It offers smooth acceleration, reducing mechanical stress on machinery and electrical inrush currents. For a standard setup at 500V and 40°C, it handles 134A and 90kW, while in an inside-delta configuration, it manages 232A and 160kW. This unit operates on 400-600V AC power and features spring-type terminals.

This soft starter is ideal for applications requiring gradual motor ramp-up, such as pumps, fans, compressors, and conveyors, helping to prevent system shock and extend equipment life. It is particularly useful in industries like water treatment, building services, and material handling.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RW4435-2BC45. Please note this is a phased-out product, with the preferred successor being the 3RW5535-2HA16. We provide access to legacy and current automation components.

Technical specifications

Manufacturer	Siemens
Part Number	3RW4435-2BC45
Series	SIRIUS
Voltage	400-600 V AC
Standard Current (500V)	134 A
Standard Power (500V)	90 kW
Inside-Delta Current (500V)	232 A
Inside-Delta Power (500V)	160 kW
Terminals	Spring-type
Status	Phased-out Product

Common applications

Pump Control

Fan Control

Conveyor Systems

Compressor Starting

Motor Soft Start

Industrial Machinery

Compatible systems

Three-Phase Induction Motors 400-600V AC Power Systems

Also known as

Siemens Soft Starter SIRIUS Soft Starter 3RW44 3RW4435-2BC45 Siemens Motor Starter

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5535-2HA16. It provides similar functionality for motor starting applications.

Technical note

Expert tip

As a phased-out product, availability may be limited. Consider the successor 3RW5535-2HA16 for new installations or direct replacements.

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Frequently asked questions

What are the key electrical specifications for the Siemens 3RW4435-2BC45 soft starter at 500V?

At 500V, the Siemens 3RW4435-2BC45 soft starter has a standard current rating of 134A and a power rating of 90kW. In an inside-delta configuration, these ratings increase to 232A and 160kW, respectively.