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Siemens SIRIUS 3RW4027-1TB05 Soft Starter | 32A, 18.5kW

Siemens SIRIUS 3RW4027-1TB05 Soft Starter

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ManufacturerSiemens

Part number3RW4027-1TB05

Operational Current 32 A

Motor Power 18.5 kW at 500 V

Control Voltage 24 V AC/DC

Input Voltage 400-600 V AC

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Veteran-owned

CAGE: 9NK75

Soft Starting and Stopping Thermistor Motor Protection Integrated Bypass Adjustable Current Limitation Wide Voltage Range Enhanced Motor Longevity

Product description

The Siemens 3RW4027-1TB05 is a SIRIUS soft starter designed for robust motor control applications. It features a 32 A operational current rating and supports motors up to 18.5 kW at 500 V. This soft starter operates within a 400-600 V AC power range and uses a 24 V AC/DC control voltage. Equipped with thermistor motor protection and an integrated bypass, it ensures comprehensive safety and efficiency for motor starting and running.

This soft starter is ideal for demanding applications such as heavy-duty pumps, compressors, presses, and large fan systems in industrial and commercial settings. It provides smooth acceleration and deceleration, reducing mechanical shock and extending the lifespan of both the motor and the driven equipment.

Source your Siemens 3RW4027-1TB05 from Stanlo Automation, your reliable veteran-owned surplus parts supplier. We are committed to providing high-quality automation components and excellent customer support.

Technical specifications

Operational Current	32 A
Motor Power	18.5 kW at 500 V
Control Voltage	24 V AC/DC
Input Voltage	400-600 V AC
Protection	Thermistor Motor Protection, Integrated Bypass
Mounting	Screw Terminals
Series	SIRIUS 3RW40
Frame Size	S0

Common applications

Heavy-duty pumps

Large compressors

Industrial presses

Large fan systems

Hydraulic systems

Material handling

Compatible systems

Three-phase asynchronous motors

Also known as

Siemens 32A 18.5kW Soft Starter SIRIUS 3RW4027-1TB05 Siemens Motor Starter

Replaces / compatible with

This part is designed to replace other Siemens soft starters within the SIRIUS 3RW40 series that have similar current and power ratings. Always verify compatibility with your existing system.

Technical note

Expert tip

The thermistor input requires connection to a compatible motor thermistor for effective thermal overload monitoring.

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Frequently asked questions

What type of motor protection does the Siemens 3RW4027-1TB05 soft starter offer?

The Siemens 3RW4027-1TB05 soft starter provides thermistor motor protection, integrated bypass, and adjustable current limitation. This combination offers comprehensive safeguarding for the motor during startup and operation.