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Siemens SIRIUS 3RW4036-2TB04 Soft Starter - 45A, 22kW

Siemens SIRIUS 3RW4036-2TB04 S2 soft starter, 45A, 22kW, with thermistor protection.

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ManufacturerSiemens

Part number3RW4036-2TB04

Series SIRIUS 3RW40

Size S2

Rated Current 45 A

Motor Power 22 kW (at 400 V)

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Soft start and soft stop functionality Integrated thermistor motor protection Spring-type terminals for easy wiring Wide control voltage range (200-480V AC) Siemens SIRIUS quality Reduced mechanical and electrical stress

Product description

The Siemens SIRIUS 3RW4036-2TB04 is a Size S2 soft starter designed for smooth and controlled starting of three-phase motors. It has a rated operational current of 45A and is suitable for motor ratings up to 22kW at 400V. The device operates on a control voltage range of 200-480V AC and features 24V AC/DC auxiliary voltage for control circuits. It is equipped with convenient spring-type terminals for secure and efficient wiring and includes integrated thermistor motor protection.

This soft starter is ideal for applications where high inrush currents need to be managed, reducing mechanical stress on machinery and electrical systems. It is widely used in industrial settings for pumps, fans, compressors, conveyors, and other motor-driven equipment to provide soft start and soft stop functionalities.

Stanlo Automation, a veteran-owned surplus parts distributor, offers reliable Siemens SIRIUS components. We provide access to high-quality industrial automation parts to help you maintain your equipment and ensure operational continuity.

Technical specifications

Series	SIRIUS 3RW40
Size	S2
Rated Current	45 A
Motor Power	22 kW (at 400 V)
Control Voltage	200-480 V AC
Auxiliary Voltage	24 V AC/DC
Terminals	Spring-type
Protection	Thermistor motor protection

Common applications

Pump control

Fan control

Conveyor systems

Compressors

Machine tools

Motor soft starting

Industrial motor applications

Compatible systems

Three-phase induction motors Industrial control panels Motor control centers

Also known as

Siemens S2 soft starter SIRIUS 3RW40 45A motor starter Siemens soft start controller

Replaces / compatible with

This soft starter is part of the Siemens SIRIUS 3RW40 series and is designed to provide controlled motor starting. It replaces direct-on-line starters where reduced inrush current is desired.

Technical note

Expert tip

Ensure the motor's thermistor (PTC) leads are correctly connected to the dedicated terminals on the soft starter for proper thermal monitoring.

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Frequently asked questions

What is the motor power rating and type of protection for the Siemens 3RW4036-2TB04 soft starter?

The Siemens SIRIUS 3RW4036-2TB04 soft starter is rated for motors up to 22 kW at 400V. It features integrated thermistor motor protection to safeguard the motor against overheating.