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Siemens 3RW4434-6BC45 SIRIUS Soft Starter - Phased Out

Siemens 3RW4434-6BC45 SIRIUS soft starter.

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ManufacturerSiemens

Part number3RW4434-6BC45

Voltage 400-600 V AC

Control Voltage 230 V AC

Standard Current 113 A (500V, 40°C)

Inside-Delta Current 196 A

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Veteran-owned

CAGE: 9NK75

High motor starting power Smooth acceleration control Reduced system shock Overload protection Integrated bypass contactor Screw terminal connections

Product description

The Siemens 3RW4434-6BC45 is a high-capacity SIRIUS soft starter designed for robust industrial motor control. It offers 113 A at 500 V (40°C standard) and 196 A inside-delta, with substantial power ratings of 75 kW and 132 kW respectively. This unit operates on 400-600 V AC and uses 230 V AC for control, featuring reliable screw terminals.

This soft starter is engineered for heavy-duty applications such as large industrial pumps, fans, crushers, and mixers, where smooth and controlled acceleration is critical to prevent damage to machinery and reduce electrical strain. It is widely used in mining, cement production, and heavy manufacturing industries.

Stanlo Automation, a veteran-owned surplus parts distributor, is your go-to source for discontinued and hard-to-find automation components. We offer the Siemens 3RW4434-6BC45 to ensure the continued operation and maintenance of your critical industrial systems. Partner with Stanlo Automation for quality, reliability, and cost-effective solutions.

Technical specifications

Voltage	400-600 V AC
Control Voltage	230 V AC
Standard Current	113 A (500V, 40°C)
Inside-Delta Current	196 A
Standard Power	75 kW (500V, 40°C)
Inside-Delta Power	132 kW
Terminals	Screw

Common applications

Heavy industrial motor control

Mining equipment

Cement production

Large pumps and fans

Crushers and mixers

Manufacturing automation

Compatible systems

Siemens SIRIUS motor control systems

Also known as

Siemens SIRIUS 3RW44 series 3RW4434 soft starter Siemens 113A soft starter

Replaces / compatible with

This product is phased out. The preferred successor is the Siemens 3RW5534-6HA16.

Technical note

Expert tip

For applications requiring higher power, the inside-delta connection utilizes the motor windings more effectively, offering higher starting torque and power output.

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Frequently asked questions

What are the current and power ratings for the Siemens 3RW4434-6BC45 soft starter?

The Siemens 3RW4434-6BC45 soft starter has a standard current rating of 113A and an inside-delta rating of 196A at 500V (40°C). This corresponds to 75kW and 132kW respectively. It operates on 400-600V AC.