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Siemens 3RW4037-2BB05 SIRIUS Soft Starter - 37kW, 63A, 400-600V AC

Siemens 3RW4037-2BB05 SIRIUS S2 soft starter, 63A, 37kW, 400-600V AC.

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ManufacturerSiemens

Part number3RW4037-2BB05

Series SIRIUS 3RW40

Size S2

Rated Operational Current (Ie) 63 A (at 40 °C)

Motor Power 37 kW (at 500 V)

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Veteran-owned

CAGE: 9NK75

Smooth motor start Reduces mechanical stress Limits inrush current 37 kW motor rating 63 A current rating Spring-type terminals Wide voltage range

Product description

The Siemens 3RW4037-2BB05 is a SIRIUS soft starter, part of the S2 size range, designed for smooth motor starting. It supports motor power up to 37 kW at 500V and has a rated operational current of 63 A at 40°C. The device operates with a wide voltage range of 400-600V AC and utilizes 24V AC/DC for its control voltage, featuring convenient spring-type terminals for easy and secure wiring.

This soft starter is essential for applications requiring controlled acceleration of three-phase motors, reducing mechanical stress on machinery and electrical inrush currents. It's commonly used in pump control, fan applications, conveyor systems, and general motor control where soft starting capabilities are needed to protect equipment and the power supply.

Stanlo Automation, your trusted veteran-owned surplus parts distributor, provides this Siemens SIRIUS soft starter. We ensure you receive reliable automation components to keep your operations running smoothly.

Technical specifications

Series	SIRIUS 3RW40
Size	S2
Rated Operational Current (Ie)	63 A (at 40 °C)
Motor Power	37 kW (at 500 V)
Control Voltage	24 V AC/DC
Main Circuit Voltage	400-600 V AC
Terminals	Spring-type

Common applications

Pump Control

Fan Control

Conveyor Systems

Compressors

General Motor Starting

Industrial Machinery

Compatible systems

Three-phase AC motors (400-600V AC)

Also known as

Siemens SIRIUS Soft Starter 3RW40 Soft Starter S2 Soft Starter

Replaces / compatible with

Replaces direct-on-line starters or older soft starter models requiring 63A and 37kW motor capacity with 400-600V AC supply.

Technical note

Expert tip

Ensure the control voltage is set correctly to 24V AC/DC for proper operation and to avoid damage to the control circuitry.

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Frequently asked questions

What is the maximum motor power that the Siemens 3RW4037-2BB05 soft starter can handle?

The Siemens 3RW4037-2BB05 soft starter is designed to handle a maximum motor power of 37 kW when operating at a voltage of 500V AC. It is rated for a continuous operational current of 63 A.