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Siemens SIRIUS 3RW5073-6TB14 Soft Starter

Siemens SIRIUS 3RW50 Soft Starter with Thermistor Input

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ManufacturerSiemens

Part number3RW5073-6TB14

Voltage 200-480V AC

Current 250A

Control Voltage 110-250V AC

Terminals Screw

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12-month warranty

All units tested

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Same-day dispatch

Order by 2pm CST

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Worldwide delivery

US, EU, Asia, Middle East

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Veteran-owned

CAGE: 9NK75

Thermistor motor protection Smooth start/stop Reduced mechanical stress Electronic overload protection Wide voltage range

Product description

The Siemens 3RW5073-6TB14 is part of the SIRIUS 3RW50 soft starter series, engineered for robust motor control. It operates within a voltage range of 200-480V AC and handles a current of 250A, with screw terminals for secure connections. The control voltage is 110-250V AC, and it is equipped with a thermistor input for motor protection.

This soft starter is ideal for applications requiring precise motor protection and controlled starting, such as in HVAC systems, pump stations, and compressor units. Its thermistor input allows for direct monitoring of motor winding temperature, preventing overheating and extending motor life.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 3RW5073-6TB14. We provide surplus industrial parts with a commitment to quality and customer satisfaction, ensuring you get the best value for your automation needs.

Technical specifications

Voltage	200-480V AC
Current	250A
Control Voltage	110-250V AC
Terminals	Screw
Input	Thermistor
Series	3RW50

Common applications

HVAC systems

Pump stations

Compressor units

Industrial fans

General motor control

Compatible systems

Compatible with industrial control panels and motor control centers.

Also known as

SIRIUS 3RW5073-6TB14 Siemens 3RW50 Series Soft Starter

Replaces / compatible with

Compatible with Siemens SIRIUS 3RW50 series accessories and control systems.

Technical note

Expert tip

Ensure proper wiring of the thermistor input circuit to prevent false tripping or failure to protect the motor in case of over-temperature conditions.

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Frequently asked questions

What is the primary function of the thermistor input on the 3RW5073-6TB14?

The thermistor input on the Siemens 3RW5073-6TB14 allows for direct monitoring of the motor's winding temperature using PTC or Klixon thermistors. This feature provides critical protection against overheating, thereby preventing motor damage and extending its operational life.