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Siemens 3RT2045-1AC20 Power Contactor - 80A, 37kW, 24V AC

Siemens 3RT2045-1AC20: 80A, 37kW 3-pole power contactor with 24V AC coil.

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ManufacturerSiemens

Part number3RT2045-1AC20

Rated operational current AC-3e/AC-3 80 A

Rated power AC-3 (at 400 V) 37 kW

Poles 3

Coil voltage 24 V AC 50/60 Hz

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AC-3e/AC-3 rated operation 80A current rating 37kW power capacity 24V AC coil S3 frame size 1 NO + 1 NC auxiliary contacts Screw terminals

Product description

The Siemens 3RT2045-1AC20 is a 3-pole power contactor designed for AC-3e/AC-3 applications, rated for 80A and 37 kW at 400V. This S3 frame size contactor operates with a 24V AC coil (50/60 Hz) and includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact. The main circuit connections are made via screw terminals. It is part of the Siemens SIRIUS line of industrial control components.

This contactor is suitable for a variety of industrial tasks, including motor control, load switching, and general power distribution in manufacturing plants, machine tools, and automation systems. The 24V AC coil voltage is a common standard in many control panels, offering flexibility in system design. Its S3 frame size indicates a higher current and power handling capability compared to smaller frame sizes.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RT2045-1AC20, providing a cost-effective solution for your automation needs. We ensure that our surplus inventory consists of quality, functional parts to keep your operations running efficiently. Choose Stanlo Automation for reliable surplus industrial parts and exceptional customer service.

Technical specifications

Rated operational current AC-3e/AC-3	80 A
Rated power AC-3 (at 400 V)	37 kW
Poles	3
Coil voltage	24 V AC 50/60 Hz
Auxiliary contacts	1 NO + 1 NC
Terminal type	Screw
Frame size	S3

Common applications

Motor control

Power switching

Industrial automation

Control panels

Machine tools

Manufacturing

Distribution systems

Compatible systems

Suitable for general industrial power switching and motor control applications using 24V AC control circuits.

Also known as

Siemens 3RT2045-1AC20 Contactor SIRIUS 3RT20 Contactor Siemens 80A 24V AC Contactor 3RT2045-1AC20

Replaces / compatible with

This contactor can replace other Siemens SIRIUS 3RT20 series contactors with similar ratings and coil voltages. Refer to Siemens documentation for precise compatibility information.

Technical note

Expert tip

The 3RT2045-1AC20, being an S3 frame size, is designed for higher power applications compared to smaller SIRIUS contactors, providing robust switching for demanding industrial loads.

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Frequently asked questions

What is the power rating and coil voltage of the Siemens 3RT2045-1AC20?

The Siemens 3RT2045-1AC20 is rated for 80A and 37 kW at 400V in AC-3e/AC-3 duty. It features a 24V AC coil, suitable for systems utilizing this common control voltage.