Siemens 3RT2446-1AD00 Contactor AC-1, 140 A, 690 V, 3-Pole, 42 V AC, 50 Hz Original Brand New

Overview

The Siemens 3RT2446-1AD00 is a reliable and robust 3-pole AC-1 contactor designed for industrial and commercial electrical applications. Engineered for high efficiency, it can handle a nominal current of 140 A at 690 V, making it suitable for heavy-duty electrical switching operations. Its auxiliary contacts provide flexible control options, while the screw and box terminals ensure secure, maintenance-friendly connections.

Key Features & Benefits

• High Current Capacity: Rated at 140 A, capable of handling demanding industrial loads.

• Wide Voltage Range: Operates efficiently up to 690 V / 40°C.

• Flexible Control: Equipped with 1 NO + 1 NC auxiliary contacts for versatile applications.

• Secure Connections: Main circuit via box terminals and control/auxiliary circuit via screw terminals.

• Compact & Durable Design: Size S3 ensures easy integration into control panels.

• Reliable Switching: 3-pole design ensures stable operation for AC-1 applications.

Function

When the 42 V AC control coil is energized, it magnetically pulls the armature, closing the 3 main power contacts (3PST-NO) to connect the load to the power source. The auxiliary contacts simultaneously change state (NO closes, NC opens) to provide feedback or control other parts of the circuit.

Application

• Switching of electric heaters and heating systems.

• Controlling capacitors (with proper de-rating).

• Switching of lighting loads and distribution circuits.

• Use in changeover or isolation functions for non-motor loads.

Technical Specification

• Type: Contactor AC-1

• Rated Current: 140 A

• Rated Voltage: 690 V / 40 °C

• Poles: 3-pole

• Coil Voltage: 42 V AC, 50 Hz

• Auxiliary Contacts: 1 NO + 1 NC

• Main Circuit Terminals: Box terminal

• Control & Auxiliary Circuit Terminals: Screw terminal

• Size: S3

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