Siemens 3MT8170-1AQ27 Contactor AC-3, 170A/90kW, 400V, 4NO4NC, 380 VAC, 50/60 Hz, 3-pole, size S8 Original Brand New

Overview

The Siemens 3MT8170-1AQ27 AC-3 Contactor is a robust and high-performance industrial switching device engineered for demanding motor control applications. Designed to meet the rigorous requirements of modern industrial environments, this 3-pole contactor is rated for 170 Amperes (AC-3) and capable of handling motor loads up to 90 kW at 400V. As part of Siemens’ trusted SIRIUS modular system, the 3MT8170-1AQ27 ensures reliable operation, extended service life, and seamless integration into complex automation systems. Its compact size S8 design with reliable screw terminals makes installation straightforward and maintenance efficient.

Key Function

The Siemens 3MT8170-1AQ27 Contactor primarily functions as an electrically operated switch for a power circuit. Its core functions include:

• Motor Switching: Efficiently controls the start, stop, and reverse (in conjunction with other contactors) of electric motors, particularly under AC-3 utilization categories which involve switching squirrel-cage motors during operation.
• Load Switching: Capable of switching resistive loads, heating elements, and other inductive loads found in industrial machinery.
• Isolation: Provides a clear electrical isolation point for maintenance or safety purposes when de-energized.
• Remote Control: Enables remote or automated control of high-current circuits when paired with appropriate control signals (380 VAC, 50/60 Hz coil voltage).
• Overload Protection Integration: Designed for easy integration with thermal overload relays to provide comprehensive motor protection.

Outstanding Features

• High Current & Power Rating: With 170A (AC-3) and 90kW (at 400V), it’s ideal for heavy-duty industrial motors.
• Versatile Contact Configuration: Features 4 normally open (NO) and 4 normally closed (NC) auxiliary contacts, providing extensive flexibility for interlocking, signaling, and control circuits.
• Reliable Coil Voltage: Operates efficiently on 380 VAC at 50/60 Hz, suitable for various international power grids.
• Durable 3-Pole Design: Ensures robust switching for three-phase motor applications.
• Compact Size S8: Optimized for space-saving in control panels without compromising performance.
• Secure Screw Terminals: Guarantees strong, reliable electrical connections and simplifies wiring.
• Robust Construction: Built to Siemens’ high-quality standards for long-term durability and operational stability in harsh industrial environments.
• Compliance: Meets relevant international standards for industrial control gear.

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