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Siemens SIRIUS 3RT2045-1KB40-1AA0 80A 37kW Contactor for PLC

Siemens SIRIUS 3RT2045-1KB40-1AA0 80A 3-pole Contactor for PLC

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ManufacturerSiemens

Part number3RT2045-1KB40-1AA0

Poles 3

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

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

Coil Voltage 24 V DC

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24V DC coil Integrated varistor Suitable for PLC outputs 80A AC-3e/AC-3 rating 37kW @ 400V power 1 NO + 1 NC auxiliary contacts Size S3

Product description

The Siemens SIRIUS 3RT2045-1KB40-1AA0 is a versatile 3-pole power contactor designed for applications requiring compatibility with PLC outputs. Rated for AC-3e/AC-3 at 80A and 37 kW at 400 V, this contactor features a 24 V DC coil with an integrated varistor for surge suppression. It comes equipped with 1 NO and 1 NC auxiliary contacts and utilizes screw terminals in a Size S3 frame.

This contactor is specifically suitable for environments utilizing Programmable Logic Controllers (PLCs), offering reliable switching for motors and other loads. Its robust design makes it ideal for use in control panels, motor control centers, and various automation systems across manufacturing, processing, and building automation industries.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RT2045-1KB40-1AA0 with a commitment to quality and customer satisfaction. Trust us to deliver the essential components you need for your industrial automation projects, ensuring efficiency and reliability.

Technical specifications

Poles	3
Current Rating (AC-3e/AC-3)	80 A
Power Rating (AC-3)	37 kW @ 400 V
Coil Voltage	24 V DC
Auxiliary Contacts	1 NO + 1 NC
Terminal Type	Screw
Size	S3
Features	Integrated varistor, Suitable for PLC outputs

Common applications

PLC controlled systems

Motor control centers

Automation panels

Industrial machinery

Manufacturing

Process control

Compatible systems

Siemens S7 series PLCs Allen-Bradley MicroLogix Other PLCs with 24V DC outputs

Also known as

Siemens Contactor 3RT2045-1KB40-1AA0 SIRIUS 3RT2 Contactor 24V DC

Replaces / compatible with

Designed to replace older Siemens 3RT1045 series contactors with similar specifications.

Technical note

Expert tip

The integrated varistor in the 3RT2045-1KB40-1AA0 helps suppress voltage transients, crucial when interfacing with sensitive electronic components like PLC outputs.

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Frequently asked questions

What makes the Siemens 3RT2045-1KB40-1AA0 suitable for PLC outputs?

The Siemens 3RT2045-1KB40-1AA0 is designed with a low-power 24V DC coil and an integrated varistor, making it compatible with the output requirements of many PLCs. This configuration helps protect the PLC from voltage spikes during switching.