Home › Manufacturers › Siemens › 3RW4037-1BB05

Siemens

Siemens 3RW4037-1BB05 SIRIUS S2 Soft Starter

Siemens SIRIUS S2 Soft Starter - 63A, 37kW

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number3RW4037-1BB05

Manufacturer Siemens

Part Number 3RW4037-1BB05

Series SIRIUS S2

Rated Operational Current 63 A

Get a price for 3RW4037-1BB05

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

Smooth Motor Starting Reduces Inrush Current Minimizes Mechanical Stress Compact Design Screw Terminal Connections 24V AC/DC Control

Product description

The Siemens 3RW4037-1BB05 is a SIRIUS S2 soft starter designed for smooth and controlled starting of three-phase asynchronous motors. With a rated operational current of 63 A and a power rating of 37 kW at 500 V, it provides efficient motor control. The unit operates with a control voltage of 24 V AC/DC and features convenient screw terminals for secure connections.

This soft starter is widely used in industrial applications to reduce mechanical stress on machinery, limit inrush currents, and optimize energy consumption during motor startup. It is suitable for use in pump, fan, compressor, and conveyor systems across sectors like general manufacturing, water management, and building services.

Stanlo Automation, a veteran-owned surplus distributor, offers this Siemens SIRIUS soft starter to help you maintain and upgrade your industrial control systems. We ensure quality surplus parts are available, providing reliable solutions for your automation needs at competitive prices.

Technical specifications

Manufacturer	Siemens
Part Number	3RW4037-1BB05
Series	SIRIUS S2
Rated Operational Current	63 A
Rated Power	37 kW (at 500 V)
Control Voltage	24 V AC/DC
Terminal Type	Screw Terminals
Operating Temperature	40 °C

Common applications

Pumps

Fans

Compressors

Conveyor Systems

Material Handling

General Manufacturing

Compatible systems

Three-Phase Asynchronous Motors Standard Industrial Control Panels

Also known as

Siemens SIRIUS 3RW40 Soft Starter 3RW40371BB05 Siemens S2 Starter

Replaces / compatible with

This soft starter is designed to provide controlled starting for motors, replacing direct-on-line starters to reduce mechanical and electrical stress.

Technical note

Expert tip

Ensure proper heat dissipation by maintaining the specified 40 °C ambient temperature or derating the current if operating in higher temperatures.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the maximum motor power this Siemens soft starter can handle?

The Siemens 3RW4037-1BB05 SIRIUS S2 soft starter is rated for a maximum motor power of 37 kW at a voltage of 500 V.