Product Description

Siemens SIRIUS Power Contactor AC-3e/AC-3 95A, 45kW, 400V, 3-Pole, 20–33V AC/DC, Size S3 – 3RT2046-1NB30

Product Description

The Siemens 3RT2046-1NB30 is a high-performance SIRIUS 3RT2 power contactor designed for reliable switching and control of three-phase motors and industrial electrical loads. It is rated at 95 A in AC-3e/AC-3 at 400 V and is suitable for motor applications up to 45 kW at 400 V.

This 3-pole power contactor features a flexible 20–33 V AC/DC control voltage with 50/60 Hz AC operation. An integrated varistor provides coil surge suppression, helping protect the control circuit from switching voltage transients.

The 3RT2046-1NB30 includes 1 NO + 1 NC auxiliary contacts for control, feedback, signaling and electrical interlocking functions. Screw terminals provide secure and reliable connections, while the Size S3 construction makes it suitable for industrial control cabinets and motor-control applications.

The contactor is suitable for demanding industrial motor-switching applications including pumps, fans, compressors, conveyors, machinery and automated production systems. Its AC-3 rating is 95 A at 400 V, while the AC-4 operational current is specified as 80 A at 400 V.

Key Features

• Genuine Siemens SIRIUS Power Contactor

• Article Number: 3RT2046-1NB30

• Product Family: SIRIUS 3RT2

• Utilization Category: AC-3e/AC-3

• Rated Operational Current AC-3: 95 A at 400 V

• Motor Power: 45 kW at 400 V

• Number of Poles: 3-pole

• Main Contacts: 3 NO

• Auxiliary Contacts: 1 NO + 1 NC

• Control Voltage: 20–33 V AC/DC

• Control Frequency: 50/60 Hz

• Integrated Varistor

• Connection Type: Screw Terminal

• Contactor Size: S3

• AC-1 Rated Current: 130 A at 400 V

• AC-4 Rated Current: 80 A at 400 V

• Main Circuit Surge Withstand Voltage: 8 kV

• Auxiliary Circuit Surge Withstand Voltage: 6 kV

• Front Protection: IP20

• Product Lifecycle: Active

• Suitable for industrial motor-control applications

Applications

The Siemens 3RT2046-1NB30 is suitable for:

• Three-phase motor control

• Direct-on-line (DOL) motor starters

• Motor starting and stopping

• Motor Control Centers (MCC)

• Industrial automation systems

• Machine control panels

• Pump control systems

• Fan and blower control

• Compressor control

• Conveyor systems

• HVAC motor applications

• Manufacturing machinery

• Industrial production equipment

• OEM control cabinets

• Electrical control panels

• Factory automation systems

Benefits

• High 95 A AC-3/AC-3e switching capacity

• Suitable for motors up to 45 kW at 400 V

• Flexible 20–33 V AC/DC control voltage

• Integrated varistor for coil surge suppression

• 1 NO + 1 NC auxiliary contacts for control and signaling

• Robust 3-pole construction

• Screw terminals for secure electrical connections

• Durable S3-size design

• Suitable for demanding industrial motor-control applications

• Reliable Siemens SIRIUS technology

• Suitable for OEM, panel-building and maintenance applications

Frequently Asked Questions

What is Siemens 3RT2046-1NB30?

The 3RT2046-1NB30 is a Siemens SIRIUS 3RT2 3-pole power contactor rated at 95 A AC-3/AC-3e and suitable for motors up to 45 kW at 400 V. It has a 20–33 V AC/DC control voltage, integrated varistor and 1 NO + 1 NC auxiliary contacts.

What is the AC-3 rating?

The contactor has a rated operational current of 95 A at 400 V in AC-3.

What motor power can it handle?

The specified AC-3 motor power is 45 kW at 400 V.

What is the control voltage?

The contactor operates with a 20–33 V AC/DC control voltage and supports 50/60 Hz AC operation.

Does the 3RT2046-1NB30 have an integrated varistor?

Yes. The 3RT2046-1NB30 has an integrated varistor for suppression of coil switching transients.

How many poles does 3RT2046-1NB30 have?

It is a 3-pole power contactor with 3 normally open main contacts.

What auxiliary contacts are included?

The contactor includes 1 NO + 1 NC auxiliary contacts.

What type of terminals does it use?

The 3RT2046-1NB30 uses screw terminals for electrical connections.

What is the contactor size?

The contactor is Size S3.

What is the AC-1 rating?

The rated operational current in AC-1 at 400 V is 130 A.

What is the AC-4 rating?

The rated operational current in AC-4 at 400 V is 80 A.

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 3RT2046-1NB30 suitable for motor applications?

Yes. It is designed for AC-3e/AC-3 motor-switching applications and is rated for 95 A and 45 kW at 400 V. Final selection should be based on the motor's rated current, power, starting conditions and applicable utilization category.

Where can Siemens 3RT2046-1NB30 be used?

It can be used in motor control centers, industrial automation panels, pumps, fans, compressors, conveyors, HVAC systems, manufacturing machinery and other industrial motor-control applications.

Is this contactor suitable for industrial control panels?

Yes. Its 95 A AC-3 rating, 45 kW motor capacity, 20–33 V AC/DC coil, integrated varistor, auxiliary contacts and S3 construction make it suitable for demanding industrial motor-control and automation applications.