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Siemens 3RT1045-1AN20 Power Contactor - 80A AC-3, 37kW

Siemens 3RT1045-1AN20 is a 3-pole AC-3 power contactor.

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ManufacturerSiemens

Part number3RT1045-1AN20

AC-3 80 A

Power 37 kW / 400 V

Coil Voltage 220 V AC

Frequency 50/60 Hz

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12-month warranty

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Veteran-owned

CAGE: 9NK75

AC-3 rating 80A 37kW at 400V 220V AC coil Size S3 Screw terminals 3-pole configuration

Product description

The Siemens 3RT1045-1AN20 is a Size S3, 3-pole power contactor from the SIRIUS 3RT1 series. It is rated for AC-3 applications at 80A and 37kW at 400V, featuring a 220V AC coil and screw terminals. This product is phased-out, with the preferred successor being the SIRIUS 3RT2038-1AN20.

This contactor is built for reliable performance in industrial applications such as motor control, power switching, and automation systems. Its robust construction and high current rating make it suitable for demanding environments where consistent operation is essential.

Stanlo Automation, a veteran-owned surplus distributor, specializes in providing access to discontinued and hard-to-find automation components. We help ensure your existing machinery can be maintained and repaired with quality parts like the Siemens 3RT1045-1AN20.

Technical specifications

AC-3	80 A
Power	37 kW / 400 V
Coil Voltage	220 V AC
Frequency	50/60 Hz
Poles	3
Size	S3
Terminals	Screw

Common applications

Motor control circuits

Industrial automation

Power distribution

Machine safety

Control panels

Compatible systems

Compatible with Siemens SIRIUS 3RT1 accessories and control systems requiring 220V AC coil control.

Also known as

Siemens 3RT1045-AN20 SIRIUS 3RT1

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2038-1AN20.

Technical note

Expert tip

The 220V AC coil requires a stable control power source to ensure reliable contactor operation.

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Frequently asked questions

What is the power rating and coil voltage of the Siemens 3RT1045-1AN20?

The Siemens 3RT1045-1AN20 power contactor is rated for 80A AC-3 duty and can switch 37kW at 400V. It operates with a 220V AC coil.