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Siemens 3RT2337-1NB30 4-Pole Contactor — 110A 20-33V AC/DC

Siemens 3RT2337-1NB30 4-pole AC-1 Contactor

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ManufacturerSiemens

Part number3RT2337-1NB30

Type Contactor AC-1

Current Rating 110 A (AC-1)

Voltage Rating 400 V

Coil Voltage 20-33 V AC/DC

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High current AC-1 rating 4-pole configuration 20-33 V AC/DC coil Integrated surge protection 1 NO + 1 NC auxiliary contacts Screw terminals

Product description

The Siemens 3RT2337-1NB30 is a robust 4-pole contactor designed for AC-1 applications, capable of handling 110 A at 400 V. It operates with a wide 20-33 V AC/DC coil voltage, supporting 50/60 Hz frequencies. This S2 size contactor includes an integrated varistor for surge protection and is equipped with 1 NO + 1 NC auxiliary contacts, all featuring screw terminals for reliable wiring.

This contactor is engineered for switching high inductive loads, making it suitable for heavy-duty motor control, power switching, and automation tasks in demanding industrial environments such as large manufacturing plants, mining operations, and utility services.

Source your industrial automation needs from Stanlo Automation, a veteran-owned distributor specializing in surplus parts. We offer competitive pricing and ensure the quality of components like the Siemens 3RT2337-1NB30, providing value and reliability.

Technical specifications

Type	Contactor AC-1
Current Rating	110 A (AC-1)
Voltage Rating	400 V
Coil Voltage	20-33 V AC/DC
Frequency	50/60 Hz
Poles	4
Auxiliary Contacts	1 NO + 1 NC
Size	S2
Terminals	Screw

Common applications

Heavy-duty motor control

High-power switching

Industrial power distribution

Manufacturing facilities

Mining equipment

Utility services

Compatible systems

General Industrial Control Panels Motor Control Systems Power Distribution Boards

Also known as

Siemens 3RT2337 3RT2337 Siemens contactor 110A

Replaces / compatible with

This part is suitable as a replacement for other Siemens 3RT2337 series contactors or equivalent high-current AC-1 contactors.

Technical note

Expert tip

Ensure proper wire termination in the screw terminals for the 110A current rating to maintain reliable contact.

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Frequently asked questions

What are the auxiliary contacts on the Siemens 3RT2337-1NB30?

The Siemens 3RT2337-1NB30 comes with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, allowing for signaling and control logic integration.