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Siemens 3RW4435-6BC35 SIRIUS Soft Starter - Phased Out

Siemens 3RW4435-6BC35 SIRIUS soft starter.

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ManufacturerSiemens

Part number3RW4435-6BC35

Voltage 400-600 V AC

Control Voltage 115 V AC

Standard Current 117 A (575V, 50°C)

Inside-Delta Current 203 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

High power motor starting Smooth acceleration Reduced electrical and mechanical stress Overload protection Integrated bypass Screw terminal connections

Product description

The Siemens 3RW4435-6BC35 is a heavy-duty SIRIUS soft starter designed for high-power motor applications. It provides 117 A at 575 V (50°C standard) and 203 A inside-delta, with substantial power ratings of 100 hp and 200 hp respectively. This unit operates on 400-600 V AC and uses 115 V AC for control, featuring reliable screw terminals.

This soft starter is ideal for demanding industrial uses such as large pumps, compressors, conveyors, and processing machinery where smooth acceleration and reduced mechanical stress are critical. It helps to protect the motor and connected equipment from the shock of direct-on-line starts. Its applications include heavy manufacturing, mining, and large-scale material handling.

Stanlo Automation, a veteran-owned surplus parts distributor, is your trusted source for obsolete and hard-to-find automation components. We offer the Siemens 3RW4435-6BC35 to help you maintain your existing systems and ensure operational continuity. Rely on Stanlo Automation for quality parts and responsive service.

Technical specifications

Voltage	400-600 V AC
Control Voltage	115 V AC
Standard Current	117 A (575V, 50°C)
Inside-Delta Current	203 A
Standard Power	100 hp (575V, 50°C)
Inside-Delta Power	200 hp
Terminals	Screw

Common applications

Heavy industrial motor control

Large pump systems

Industrial compressors

Conveyor systems

Material handling

Mining applications

Compatible systems

Siemens SIRIUS motor control systems

Also known as

Siemens SIRIUS 3RW44 3RW4435 soft starter Siemens 117A soft starter

Replaces / compatible with

This product is phased out. The preferred successor is the Siemens 3RW5535-6HA16.

Technical note

Expert tip

The high current and power ratings make this soft starter suitable for extremely demanding applications, ensuring smooth starts and protecting equipment from severe mechanical shock.

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Frequently asked questions

What are the key specifications for the Siemens 3RW4435-6BC35 soft starter?

The Siemens 3RW4435-6BC35 operates on 400-600V AC with a 115V AC control voltage. It features standard and inside-delta current ratings of 117A and 203A respectively at 575V (50°C), corresponding to 100hp and 200hp.