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Siemens 3RT1045-1AD04 SIRIUS Power Contactor

Siemens 3RT1045-1AD04 3-Pole Power Contactor

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ManufacturerSiemens

Part number3RT1045-1AD04

Type Power Contactor

Manufacturer Siemens

Part Number 3RT1045-1AD04

AC-3 Rating 80 A

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AC-3 rating 80A 37 kW @ 400V 42V AC coil 3-pole configuration 2 NO + 2 NC auxiliary contacts Size S3

Product description

The Siemens 3RT1045-1AD04 is a 3-pole power contactor from the SIRIUS 3RT1 series. It is rated for AC-3 duty with an 80A current and 37 kW power at 400V. This unit features a 42V AC coil (50 Hz) and includes 2 Normally Open and 2 Normally Closed auxiliary contacts. It uses screw terminals for its main and auxiliary circuits and is classified as Size S3.

This contactor is engineered for robust performance in controlling high-power motors and switching loads in demanding industrial environments. Applications include motor control centers, large machine tools, and comprehensive automation systems where reliability is essential.

As a veteran-owned surplus distributor, Stanlo Automation is your trusted source for the Siemens 3RT1045-1AD04. Secure this component to maintain your operational continuity and leverage our expertise in industrial automation parts.

Technical specifications

Type	Power Contactor
Manufacturer	Siemens
Part Number	3RT1045-1AD04
AC-3 Rating	80 A
Power Rating	37 kW @ 400 V
Coil Voltage	42 V AC, 50 Hz
Poles	3
Auxiliary Contacts	2 NO + 2 NC
Size	S3
Terminal Type	Screw terminal
Series	SIRIUS 3RT1

Common applications

Motor control

Industrial automation

Machine tools

Power distribution

Control panels

High-power switching

Compatible systems

N/A (Component level)

Also known as

SIRIUS 3RT1045-1AD04 Siemens Contactor 3RT1045-1AD04 80A Contactor Siemens

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2038-1AD04.

Technical note

Expert tip

The 42V AC coil voltage requires a specific control transformer or power source, ensure compatibility with your system's voltage distribution.

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Frequently asked questions

What is the coil voltage and frequency for the Siemens 3RT1045-1AD04 contactor?

The Siemens 3RT1045-1AD04 power contactor operates with a 42V AC coil voltage, specified for a 50 Hz frequency. This is crucial for ensuring proper operation in compatible control systems.