Siemens 3RT2446-1NF30 AC Contactor 140A, 690V, 3-Pole with Integrated Varistor Original Brand New

Overview

The Siemens 3RT2446-1NF30 is a high-performance AC contactor designed for industrial and commercial applications requiring reliable switching of electric circuits. Built to handle a load of 140 A at 690 V, this 3-pole contactor ensures safe and efficient control of motors, lighting, and heating systems. Equipped with an integrated varistor, it protects against voltage spikes and prolongs the life of connected devices.

Features

• Rated operational current: AC-1, 140 A

• Rated voltage: 690 V at 40°C

• Poles: 3-pole design for robust applications

• Coil voltage: 83–155 V AC/DC, 50/60 Hz

• Integrated varistor for surge protection

• Auxiliary contacts: 1 NO + 1 NC

• Main circuit: box terminal

• Control and auxiliary circuit: screw terminal

• Size: S3

Benefit

• Reliable Operation: Designed for high-load switching with consistent performance.

• Surge Protection: Integrated varistor safeguards equipment against voltage spikes.

• Flexible Installation: Supports both box and screw terminals for easy wiring.

• Versatile Control: Auxiliary contacts allow additional control functions in complex circuits.

• Durable Build: High-quality Siemens construction ensures long-lasting use.

Functionality

The Siemens 3RT2446-1NF30 contactor is ideal for motor control, industrial automation, and electrical circuit protection. Its combination of main and auxiliary contacts allows for both power switching and signaling functions. The device’s varistor provides additional protection against transient voltage, making it a reliable component for high-demand industrial systems.

Application

• Electric Heating Systems: Switching large resistive heating elements.

• Lighting Systems: Controlling large banks of industrial or stadium lighting.

• Power Distribution: Acting as a main disconnect or distribution switch for high-current circuits.

• Transformer Control: Switching primary circuits of transformers within its AC-1 rating.