Siemens 3MT8120-1AV04 AC-3 Power Contactor 120A, 55kW, 400V Original Brand New

Siemens 3MT8120-1AV04 AC-3 Power Contactor – High-Performance 120A, 55kW Solution

Overview

Siemens 3MT8120-1AV04 Contactor is a robust and essential component for demanding industrial power control applications. Engineered for superior performance, this 3-pole AC-3 utilization category contactor is perfectly suited for switching squirrel-cage motors up to 55 kW at 400V. Its substantial 120A current rating makes it ideal for heavy-duty switching tasks in manufacturing, processing, and automation environments. As part of the Siemens S6 size range, it offers a compact yet powerful solution for managing significant electrical loads.

Function

The primary function of the Siemens 3MT8120-1AV04 Contactor is to safely and efficiently control the flow of electrical power to industrial machinery, particularly three-phase motors. Activated by a 400VAC, 50 Hz control coil, the contactor’s main poles close, enabling the motor to operate. The inclusion of two Normally Open (2NO) and two Normally Closed (2NC) auxiliary contacts provides extensive flexibility for interlocking, signaling, and integrating into complex control circuits, enhancing both safety and operational versatility. The secure screw terminals ensure reliable and straightforward wiring.

Key Features:

• High Current & Power Rating: Rated for AC-3 operation at 120 Amps, suitable for motors up to 55 kW at 400 Volts.
• Robust 3-Pole Design: Ensures reliable switching of three-phase power systems.
• Versatile Auxiliary Contacts: Equipped with 2 Normally Open (2NO) and 2 Normally Closed (2NC) contacts for advanced control and feedback.
• Standard Control Voltage: Operates with a 400VAC, 50 Hz control coil, common in industrial setups.
• Compact S6 Size: Optimizes panel space while delivering high power capacity.
• Secure Connection: Features sturdy screw terminals for simple and dependable wiring.
• Durable Performance: Built to Siemens’ rigorous quality standards for longevity in demanding industrial environments.
• Wide Application: Ideal for motor starting, lighting, heating, and general power switching in heavy-duty industrial scenarios.

Technical Specifications:

• Product Model: Siemens 3MT8120-1AV04
• Utilization Category: AC-3
• Rated Operational Current (Ie): 120 A (at 400V)
• Rated Operational Power (Pe): 55 kW (at 400V)
• Rated Operational Voltage: 400 V
• Control Supply Voltage: 400 V AC, 50 Hz
• Number of Poles: 3-pole
• Auxiliary Contacts: 2 NO + 2 NC
• Size: S6
• Terminal Type: Screw Terminal

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