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Siemens SIRIUS 3RT2045-1NB30 80A 37kW Contactor AC/DC Coil

Siemens SIRIUS 3RT2045-1NB30 80A 3-pole Contactor AC/DC Coil

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ManufacturerSiemens

Part number3RT2045-1NB30

Poles 3

Current Rating (AC-3e/AC-3) 80 A

Power Rating (AC-3) 37 kW @ 400 V

Coil Voltage 20-33 V AC/DC

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Wide 20-33V AC/DC coil Integrated varistor 80A AC-3e/AC-3 rating 37kW @ 400V power 1 NO + 1 NC auxiliary contacts Size S3

Product description

The Siemens SIRIUS 3RT2045-1NB30 is a versatile 3-pole power contactor designed for broad application flexibility. It is rated for AC-3e/AC-3 at 80A and can switch motor loads up to 37 kW at 400 V. This contactor features a unique 20-33 V AC/DC coil, making it adaptable to various control voltage requirements, and includes an integrated varistor for surge protection. It is equipped with 1 NO and 1 NC auxiliary contacts and utilizes screw terminals in a Size S3 frame.

This contactor is ideal for applications requiring a wide voltage tolerance for the control circuit, such as in systems with fluctuating power supplies or where a single contactor needs to accommodate different control voltage standards. It finds use in motor control, automation panels, and general industrial switching applications.

Stanlo Automation, your trusted veteran-owned surplus parts distributor, offers the Siemens 3RT2045-1NB30. We provide reliable access to essential industrial components, ensuring you receive quality parts to maintain and upgrade your automation systems.

Technical specifications

Poles	3
Current Rating (AC-3e/AC-3)	80 A
Power Rating (AC-3)	37 kW @ 400 V
Coil Voltage	20-33 V AC/DC
Auxiliary Contacts	1 NO + 1 NC
Terminal Type	Screw
Size	S3
Features	Integrated varistor

Common applications

Variable voltage control systems

Motor control

Automation panels

Industrial switching

Manufacturing

Electrical installations

Compatible systems

Systems with 24V AC/DC control circuits Automation control panels Variable voltage control applications

Also known as

Siemens Contactor 3RT2045-1NB30 SIRIUS 3RT Wide Voltage Contactor

Replaces / compatible with

This contactor can replace older Siemens 3RT1045 models and offers a wider coil voltage range.

Technical note

Expert tip

The 3RT2045-1NB30's wide AC/DC coil voltage range (20-33V) is beneficial for applications where power supply stability may be a concern or for using a single part number across multiple voltage systems.

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Frequently asked questions

What is the advantage of the 20-33V AC/DC coil on the Siemens 3RT2045-1NB30?

The 20-33V AC/DC coil provides flexibility for systems with varying control voltages. It accommodates a broader range than standard AC or DC coils, simplifying inventory and application in diverse electrical environments.