Product Description

Siemens SIRIUS Contactor AC-1 110A, 400V AC, 4-Pole, Size S3 – 3RT2344-1AV00

Product Description

The Siemens 3RT2344-1AV00 is a genuine Siemens SIRIUS 3RT23 four-pole contactor designed for reliable switching of electrical loads in industrial control and automation applications. It is rated for 110 A AC-1 at 400 V and 40°C, making it suitable for switching non-inductive or low-inductive loads in industrial electrical systems.

This 4-pole Siemens contactor features a 400 V AC control voltage at 50 Hz and includes 1 NO + 1 NC auxiliary contacts for control, signaling and interlocking functions. The main circuit uses screw terminals, providing a secure and practical connection method for panel installations. The contactor has a robust Size S3 construction suitable for demanding industrial applications.

The 3RT2344-1AV00 belongs to the Siemens SIRIUS 3RT.3 family of special-application four-pole contactors. Siemens documentation lists this series for AC-1 switching applications and specifies 110 A AC-1 at 40°C for the 3RT2344 size S3 variant. At 60°C, the corresponding AC-1 rating is 95 A.

With its four main contacts, integrated auxiliary contacts and industrial S3 design, the Siemens 3RT2344-1AV00 is suitable for resistive load switching, heating systems, power distribution, industrial automation panels, capacitor-free load switching, HVAC equipment, lighting control and other AC-1 applications.

The contactor provides a rated insulation voltage of up to 690 V and rated surge withstand voltage of 8 kV for the main circuit and 6 kV for the auxiliary circuit. The front protection class is IP20.

Key Features

• Genuine Siemens SIRIUS contactor

• Article Number: 3RT2344-1AV00

• Product Family: SIRIUS 3RT23

• Utilization Category: AC-1

• Rated Operational Current: 110 A at 400 V / 40°C

• AC-1 rating at 60°C: 95 A

• Rated Voltage: 400 V AC

• Control Voltage: 400 V AC

• Control Frequency: 50 Hz

• Number of Poles: 4-pole

• Main Contacts: 4 NO

• Auxiliary Contacts: 1 NO + 1 NC

• Connection Type: Screw Terminal

• Contactor Size: S3

• Rated Insulation Voltage: up to 690 V

• Main Circuit Surge Withstand Voltage: 8 kV

• Auxiliary Circuit Surge Withstand Voltage: 6 kV

• Front Protection: IP20

• Suitable for AC-1 load switching

• Suitable for screw and snap-on mounting on TH35 DIN rail

Applications

The Siemens 3RT2344-1AV00 AC-1 contactor is suitable for:

• Resistive load switching

• Heating systems

• Industrial heating equipment

• Electrical distribution panels

• HVAC control systems

• Industrial automation panels

• Lighting control applications

• Machine control cabinets

• Power switching systems

• Industrial control panels

• Manufacturing equipment

• OEM control cabinets

• AC load switching

• Factory automation systems

• Industrial electrical installations

Benefits

• High 110 A AC-1 switching capacity

• Suitable for loads up to 400 V AC

• Four-pole configuration provides flexible circuit switching

• Integrated 1 NO + 1 NC auxiliary contacts

• 400 V AC, 50 Hz control supply

• Screw terminals provide reliable electrical connections

• Robust S3-size construction

• Suitable for industrial control cabinets

• Supports DIN rail mounting

• High insulation and surge withstand capability

• Suitable for demanding AC-1 switching applications

• Genuine Siemens SIRIUS product

• Suitable for OEM, panel-building and maintenance applications

Frequently Asked Questions

What is Siemens 3RT2344-1AV00?

The 3RT2344-1AV00 is a Siemens SIRIUS 4-pole AC-1 contactor rated at 110 A at 400 V and 40°C, with a 400 V AC, 50 Hz control supply and 1 NO + 1 NC auxiliary contacts.

What is the AC-1 current rating of 3RT2344-1AV00?

The contactor is rated for 110 A AC-1 at 400 V and 40°C. At 60°C, its AC-1 rating is 95 A.

What is the control voltage?

The 3RT2344-1AV00 uses a 400 V AC control voltage at 50 Hz.

How many poles does the contactor have?

It is a 4-pole contactor with 4 normally open main contacts.

How many auxiliary contacts are included?

The contactor has 1 NO + 1 NC auxiliary contacts integrated into the device.

What is the size of Siemens 3RT2344-1AV00?

The contactor is Size S3.

What type of terminals does it use?

The 3RT2344-1AV00 uses screw terminals for electrical connections.

What is the insulation voltage?

The rated insulation voltage is up to 690 V.

What is the surge withstand voltage?

The rated surge withstand voltage is 8 kV for the main circuit and 6 kV for the auxiliary circuit.

Is 3RT2344-1AV00 suitable for motor applications?

This model is primarily an AC-1 contactor for non-inductive or low-inductive loads. Siemens lists the 3RT2344 variant with an AC-3 rating of not applicable in its special-application 4-pole contactor data, so it should not be selected as a conventional AC-3 motor contactor based only on its 110 A AC-1 rating.

Where can Siemens 3RT2344-1AV00 be used?

It is suitable for resistive loads, heating equipment, HVAC systems, power distribution, industrial automation, lighting control and other AC-1 switching applications.

What is the protection class?

The front of the contactor has IP20 protection.

Is Siemens 3RT2344-1AV00 suitable for industrial control panels?

Yes. Its 110 A AC-1 rating, 4-pole configuration, S3 construction and integrated auxiliary contacts make it suitable for industrial control panels and electrical load-switching applications.