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Siemens 3RT1045-1AC20 Power Contactor - 80A, 24V AC Coil

Siemens 3RT1045-1AC20 3-Pole Power Contactor

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ManufacturerSiemens

Part number3RT1045-1AC20

AC-3 Rating 80 A

Power 37 kW / 400 V

Coil Voltage 24 V AC

Poles 3

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80A AC-3 rating 37kW motor power 24V AC control coil 3-pole configuration Size S3 SIRIUS series Screw terminals

Product description

The Siemens 3RT1045-1AC20 is a 3-pole power contactor from the SIRIUS line, designed for reliable motor control. It boasts an AC-3 rating of 80 Amps and can handle 37 kW at 400 Volts. This Size S3 contactor features a 24V AC coil for control circuits and is equipped with screw terminals for secure connections. It is compliant with IEC 60947 standards.

This contactor is ideal for three-phase motor starting and switching applications across various industries, including manufacturing, automation, and building services. Its 80A capacity and 24V AC coil make it a versatile choice for control panels and machinery requiring standard voltage control inputs.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RT1045-1AC20. We provide high-quality industrial automation components, ensuring your operations run smoothly. Trust Stanlo Automation for your critical parts needs, backed by expert support and a commitment to value.

Technical specifications

AC-3 Rating	80 A
Power	37 kW / 400 V
Coil Voltage	24 V AC
Poles	3
Size	S3
Terminals	Screw
Standard	IEC 60947

Common applications

Motor control

Three-phase motors

Industrial automation

Control panels

Manufacturing

Building automation

Compatible systems

Siemens SIRIUS motor starters Industrial control systems 35mm DIN rail mounting

Also known as

SIRIUS 3RT1045-1AC20 Siemens 80A Contactor

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2038-1AC20.

Technical note

Expert tip

The 24V AC coil is ideal for applications where lower control voltages are preferred or mandated for safety.

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Frequently asked questions

What is the coil voltage for the Siemens 3RT1045-1AC20 contactor?

The Siemens 3RT1045-1AC20 power contactor has a coil voltage of 24V AC. This is suitable for standard control circuits in industrial automation.