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Siemens 3RT1045-1AP04 Contactor - 80A, 37kW, 2 NO + 2 NC

Siemens 3RT1045-1AP04 is a 3-pole AC-3 power contactor with auxiliary contacts.

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ManufacturerSiemens

Part number3RT1045-1AP04

AC-3 80 A

Power 37 kW / 400 V

Coil Voltage 230 V AC

Frequency 50 Hz

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AC-3 rating 80A 37kW at 400V 230V AC coil 2 NO + 2 NC auxiliary contacts Size S3 Screw terminals

Product description

The Siemens 3RT1045-1AP04 is a 3-pole power contactor from the SIRIUS 3RT1 series, rated for AC-3 duty at 80A and 37kW at 400V. It features a 230V AC coil and includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts. This Size S3 unit with screw terminals is a phased-out product, with the preferred successor being the SIRIUS 3RT2038-1AP04.

This contactor is ideal for applications requiring auxiliary contacts for control or signaling in addition to power switching. It's commonly used in motor control, automation systems, and control panels where interlocking or status feedback is necessary.

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Technical specifications

AC-3	80 A
Power	37 kW / 400 V
Coil Voltage	230 V AC
Frequency	50 Hz
Poles	3
Aux Contacts	2 NO + 2 NC
Size	S3
Terminals	Screw

Common applications

Motor control with signaling

Automation circuits

Control panels

Machine tools

Conveyor systems

Compatible systems

Compatible with Siemens SIRIUS 3RT1 accessories and control systems requiring 230V AC coil control and auxiliary contact integration.

Also known as

Siemens 3RT1045-AP04 SIRIUS 3RT1

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2038-1AP04.

Technical note

Expert tip

The auxiliary contacts can be utilized for control logic, interlocking, or status indication within the automation system.

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Frequently asked questions

Does the Siemens 3RT1045-1AP04 have auxiliary contacts?

Yes, the Siemens 3RT1045-1AP04 power contactor is equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, in addition to its main power switching poles.