Siemens 3RT1056-1AB36 Power Contactor SIRIUS 185A, 90kW, 23-26V AC/DC Original Brand New

Overview

The Siemens 3RT1056-1AB36 power contactor is a heavy-duty switching device crucial for industrial control applications, particularly for starting and stopping three-phase asynchronous motors. As part of the globally recognized SIRIUS modular system, this $3\text{-pole}$ contactor ensures high contact reliability and a long mechanical service life ($10\text{ million}$ operating cycles typical).

It is rated for a powerful operational current of $185\text{ A}$ under the new high-efficiency AC-3e/AC-3 utilization category at $400\text{ V}$, supporting motor loads up to $90\text{ kW}$. The coil is flexible, operating on a low control voltage of $23\text{–}26\text{ V}$ for both AC (50/60 Hz) and DC systems.

Key Technical Specification

• Product Number: 3RT1056-1AB36
• Contactor Size: S6
• Number of Poles: 3-pole main contacts
• Operational Current (AC-3e/AC-3): $185\text{ A}$ at $400\text{ V}$
• Operational Power (AC-3e/AC-3): $90\text{ kW}$ at $400\text{ V}$
• Control Coil Voltage (Uc​): $23\text{–}26\text{ V}$ (AC $50/60\text{ Hz}$ / DC)
• Auxiliary Contacts: $2\text{ NO}+2\text{ NC}$ (Integrated/Pre-installed)
• Main Circuit Connection: Box Terminals (Frame Clamp)
• Control/Auxiliary Circuit Connection: Screw Terminals
• Design: Conventional Drive
• AC-1 Rated Current: $215\text{ A}$ at 400 V(40∘C)

Benefits & Features

1. IE3/IE4 Ready: Optimized for switching high-efficiency motors, meeting modern energy standards with the AC-3e utilization category.
2. Global Use & High Reliability: Climate-resistant and approved for worldwide applications (e.g., IEC and UL/CSA), guaranteeing a dependable performance even in extreme conditions (–25∘C to +60∘C).
3. Flexible Control Voltage: The $23\text{–}26\text{ V}$ AC/DC coil simplifies stock keeping and integration into low-voltage control systems, including PLC outputs.
4. Integrated Auxiliary Contacts: The built-in $2\text{ NO}+2\text{ NC}$ contacts reduce complexity and wiring effort, providing essential feedback and interlock points.
5. Robust Connection: Features rugged box terminals for the main power circuit, ensuring a secure and high-capacity connection for $185\text{ A}$ loads.

Application

The 3RT1056-1AB36 contactor is an ideal solution for:

• Direct-on-line (DOL) motor starting for $90\text{ kW}$ three-phase motors.
• Controlling large industrial loads and heating systems (up to $215\text{ A}$ AC-1).
• Integration into complex motor control centers (MCCs) and automation systems.

For the 3RT1056-1AB36 and a complete range of industrial control products, visit Turll today!