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Siemens 3RW4435-6BC34 SIRIUS Soft Starter - Phased Out Product

Siemens 3RW4435-6BC34 SIRIUS Soft Starter (Phased Out).

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ManufacturerSiemens

Part number3RW4435-6BC34

Part Number 3RW4435-6BC34

Manufacturer Siemens

Series SIRIUS

Type Soft Starter

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Veteran-owned

CAGE: 9NK75

Smooth motor start-up Reduces starting current Protects motor and machinery Handles high currents (117A std, 203A delta) Screw terminals for connection

Product description

The Siemens 3RW4435-6BC34 is a SIRIUS soft starter, designed to gradually increase motor voltage to reduce starting current and mechanical stress. At 460V and 50°C, it handles 117A in standard configuration and 203A when connected inside-delta. This unit operates on 200-460V AC input power with a 115V AC control voltage and features screw terminals.

This soft starter is suitable for controlling the ramp-up of medium to large three-phase asynchronous motors in applications such as pumps, fans, compressors, and conveyors. Its function is to provide a smooth start, protecting both the motor and the connected machinery from the shocks of direct online starting.

Please note that this product is phased out. The preferred successor is the SIRIUS 3RW5 series, specifically type 3RW5535-6HA14. Stanlo Automation, a veteran-owned surplus parts distributor, may have this older unit or its successors available. Contact us for your industrial automation needs.

Technical specifications

Part Number	3RW4435-6BC34
Manufacturer	Siemens
Series	SIRIUS
Type	Soft Starter
Standard Rating (460V, 50°C)	117 A
Inside-Delta Rating (460V, 50°C)	203 A
Input Voltage	200-460 V AC
Control Voltage	115 V AC
Terminals	Screw
Status	Phased-out product

Common applications

Pump control

Fan control

Compressor start-up

Conveyor systems

Industrial Motor Control

Machinery Protection

Compatible systems

Three-phase asynchronous motors Standard motor control circuits

Also known as

Siemens SIRIUS 3RW44 3RW4435 soft starter Siemens motor starter

Replaces / compatible with

Phased-out product. The preferred successor is the SIRIUS 3RW5 series, with type 3RW5535-6HA14 being the recommended replacement.

Technical note

Expert tip

As this is a phased-out product, ensure availability of spare parts and consider the recommended successor, 3RW5535-6HA14, for new installations or replacements.

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Frequently asked questions

What are the current ratings for the Siemens 3RW4435-6BC34 soft starter at 460V?

The Siemens 3RW4435-6BC34 SIRIUS soft starter has a standard current rating of 117A at 460V (50°C) and an inside-delta rating of 203A at 460V (50°C). It is important to note this is a phased-out product.