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Siemens 3RT1035-1AK64 SIRIUS Power Contactor — 40A, 18.5kW

Siemens 3RT1035-1AK64 SIRIUS 3-pole power contactor.

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ManufacturerSiemens

Part number3RT1035-1AK64

AC-3 Rating 40 A

Power 18.5 kW / 400 V

Coil Voltage 110 V AC (50 Hz) / 120 V AC (60 Hz)

Poles 3

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AC-3 Rated 40A 18.5kW @ 400V 110/120V AC Coil 2 NO + 2 NC Aux Contacts Size S2 Contactor Screw Terminals

Product description

The Siemens 3RT1035-1AK64 is a 3-pole power contactor from the SIRIUS 3RT1 series, rated for AC-3 applications at 40A and 18.5kW (400V). This model features a 110V AC coil (50 Hz / 120 V, 60 Hz) and includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, in addition to its main power contacts. It uses screw terminals and is a Size S2 device. This is a phased-out product, with the preferred successor being the SIRIUS 3RT2 series, specifically the 3RT2028-1AK60.

This power contactor is well-suited for motor control, control panel applications, and automation systems where auxiliary contacts are needed for signaling or interlocking. The combination of power and auxiliary contacts simplifies wiring and reduces the need for separate auxiliary contact blocks.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RT1035-1AK64. We provide reliable access to essential components for your maintenance and operational needs.

Technical specifications

AC-3 Rating	40 A
Power	18.5 kW / 400 V
Coil Voltage	110 V AC (50 Hz) / 120 V AC (60 Hz)
Poles	3
Auxiliary Contacts	2 NO + 2 NC
Size	S2
Terminals	Screw
Series	SIRIUS 3RT1

Common applications

Motor Control

Industrial Automation

Control Panels

Signaling Circuits

Manufacturing

Compatible systems

Compatible with SIRIUS 3RT2 accessories Suitable for general motor control with signaling

Also known as

Siemens 3RT1035-1AK64 Contactor SIRIUS 3RT1 110V AC Aux Contactor Siemens 40A 2 NO 2 NC Contactor

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2028-1AK60.

Technical note

Expert tip

The integrated 2 NO + 2 NC auxiliary contacts on the 3RT1035-1AK64 simplify control circuit design by eliminating the need for add-on blocks in many applications.

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Frequently asked questions

What auxiliary contacts are included with the Siemens 3RT1035-1AK64?

The Siemens 3RT1035-1AK64 power contactor is equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, in addition to its main power poles. These provide additional control and signaling capabilities.