Siemens 3RT1066-6AD36 Power Contactor, 300A, 160kW, 42-48V AC/DC Coil, SIRIUS 3RT1 Original Brand New

Overview

The Siemens 3RT1066-6AD36 is a robust, 3-pole Power Contactor from the acclaimed SIRIUS 3RT1 series, engineered for reliable switching of large motors and high-current loads. Rated for performance up to 300 A (AC-3e/AC-3) and capable of handling 160 kW at 400 V, this device is ideal for heavy-duty industrial applications.

This specific model features a versatile 42-48 V AC (50-60 Hz) / DC conventional operating coil (UC – Universal Control) and comes pre-fitted with an integral 2 NO + 2 NC auxiliary contact block, simplifying installation and wiring. Its main circuit uses busbar connections for high current distribution, while the control and auxiliary circuits utilize standard screw terminals for secure, easy wiring. This is a Size S10 contactor, known for its compact design relative to its high power rating.

Key Technical Specification

• Product ID: 3RT1066-6AD36
• Series: SIRIUS 3RT1
• Size: S10
• Main Current Rating (AC-3e/AC-3): 300 A
• Motor Power (400V): 160 kW
• Poles: 3-pole
• Control Coil Voltage (Uc): 42-48 V AC (50/60 Hz) / DC (Universal Control)
• Auxiliary Contacts: 2 NO + 2 NC (Integrated)
• Main Circuit Connection: Busbar
• Control/Auxiliary Circuit Connection: Screw Terminal

Function & Application

The Siemens 3RT1066-6AD36 contactor is designed for:

• Switching 3-phase AC motors (up to 160 kW) as part of a Direct-on-Line (DOL) starter or as the main switch in more complex motor control systems.
• General high-current load switching (AC-1 duty up to 330 A at 40°C, typical).
• Integration into automated control panels where a reliable high-power switching element is required.

Benefit

• High Performance in a Compact Design: The SIRIUS modular system ensures maximum power handling (160 kW) in a space-saving S10 size.
• Global Standard Compliance: Approved for worldwide use (IEC, UL/CSA, CCC, etc.), ensuring suitability for export machinery.
• Enhanced Reliability: The integrated 2 NO + 2 NC auxiliary contacts provide essential feedback and control capability for interlocks and PLC inputs.
• Flexible Control: The 42-48 V AC/DC (UC) coil allows for versatile use in low-voltage control circuits, accommodating both AC and DC control signals without requiring separate units.
• Simplified High-Current Wiring: The Busbar main connection offers a clean, robust, and highly efficient solution for connecting thick power cables or busbars, reducing installation time and potential connection errors.
• IE3/IE4 Ready: Optimized for use with high-efficiency IE3 and IE4 motors.

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