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Siemens SIRIUS Soft Starter S2 - 72A

Siemens SIRIUS soft starter S2, 72A, 45kW, 400-600V AC.

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ManufacturerSiemens

Part number3RW4038-2TB05

Rating S2

Current 72 A

Power 45 kW (at 500 V)

Voltage 400-600 V AC

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12-month warranty

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Veteran-owned

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S2 Soft Starter 72A Current Rating 45kW Power 400-600V AC Operation 24V AC/DC Control Spring-type terminals Thermistor motor protection

Product description

The Siemens SIRIUS soft starter 3RW4038-2TB05 is a sophisticated device designed for smooth motor acceleration and deceleration. Rated as an S2 soft starter with a current of 72A, it can handle motor loads up to 45 kW at 500 V. It operates within a voltage range of 400-600V AC and features 24V AC/DC spring-type terminals for control power.

This soft starter is ideal for applications where reducing mechanical stress on machinery and electrical inrush current is crucial. It is widely used in pump control, fan systems, compressors, and conveyor belts. The integrated thermistor motor protection provides an added layer of safety and operational reliability.

Stanlo Automation, a veteran-owned business, offers the Siemens 3RW4038-2TB05 soft starter. Equip your systems with reliable and efficient motor control solutions from our extensive inventory of surplus industrial automation parts.

Technical specifications

Rating	S2
Current	72 A
Power	45 kW (at 500 V)
Voltage	400-600 V AC
Control Voltage	24 V AC/DC
Terminals	Spring-type
Protection	Thermistor motor protection

Common applications

Motor Control

Pump Systems

Fan Control

Conveyor Systems

Compressors

HVAC

Industrial Automation

Compatible systems

AC Motors Standard Motor Protection Relays Control Systems

Also known as

SIRIUS 3RW40 Siemens soft starter

Replaces / compatible with

Replaces direct-on-line starters for smoother starting, reducing mechanical shock and electrical stress.

Technical note

Expert tip

The spring-type terminals offer vibration resistance and quick installation, suitable for environments with frequent shock or vibration.

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Frequently asked questions

What is the maximum motor power for the Siemens 3RW4038-2TB05 soft starter at 500V?

The Siemens 3RW4038-2TB05 soft starter is rated for a maximum motor power of 45 kW at 500 V AC. It operates with a 72 A current and supports 400-600V AC supply.