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Siemens SIRIUS 3RW4435-6BC45 Soft Starter - 134A, 90kW

Siemens SIRIUS soft starter - 134A, 90kW (500V).

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ManufacturerSiemens

Part number3RW4435-6BC45

Rated Current (standard) 134 A (40°C)

Rated Power (standard, 500V) 90 kW

Rated Current (inside-delta) 232 A

Rated Power (inside-delta, 500V) 160 kW

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Smooth motor acceleration Reduced inrush current Protection against mechanical stress Overload protection capability SIRIUS design

Product description

The Siemens 3RW4435-6BC45 is a SIRIUS soft starter with standard ratings of 134 A at 500 V and 40°C, supporting 90 kW motor power. In an inside-delta connection, it can handle 232 A and 160 kW. It operates on AC voltages from 400-600 V and is controlled by a 230 V AC coil, featuring screw terminals for connections. Please note this is a phased-out product.

This soft starter is designed for smooth acceleration of three-phase motors, reducing mechanical stress on machinery and electrical inrush current. It is ideal for applications in pumps, fans, conveyors, and compressors where gradual start-up is beneficial for equipment longevity and power system stability.

Stanlo Automation, a veteran-owned surplus distributor, offers this Siemens SIRIUS soft starter. We provide access to essential industrial components, including legacy parts, to ensure your automation systems remain operational. Rely on us for your surplus part needs.

Technical specifications

Rated Current (standard)	134 A (40°C)
Rated Power (standard, 500V)	90 kW
Rated Current (inside-delta)	232 A
Rated Power (inside-delta, 500V)	160 kW
Control Voltage	230 V AC
Main Circuit Voltage	400-600 V AC
Terminals	Screw terminals
Product Status	Phased-out

Common applications

Pump control

Fan control

Conveyor systems

Compressor control

Industrial machinery

Compatible systems

Three-phase AC motors, 400-600V systems

Also known as

Siemens SIRIUS Soft Starter 3RW44 3RW4435-6BC45 Siemens starter

Replaces / compatible with

Phased-out product. Preferred successor is SIRIUS 3RW5535-6HA16. Compatible with SIRIUS 3RW44 series accessories.

Technical note

Expert tip

Ensure the internal delta connection is correctly wired if utilizing the higher current/power ratings. Verify compatibility with the specific motor and application requirements.

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Frequently asked questions

What is the successor for the Siemens 3RW4435-6BC45 soft starter?

The Siemens 3RW4435-6BC45 is a phased-out product. The preferred successor is the SIRIUS 3RW5535-6HA16. While the successor offers updated features, the 3RW44 provides robust soft-starting capabilities for motors.