Siemens 3RT2027-1BB44-3MA0 SIRIUS 3RT2 Power Contactor 3-Pole, 32A, 15kW, 24V DC, Size S0, Screw Terminal Original Brand New

Overview

The Siemens 3RT2027-1BB44-3MA0 is a high-performance SIRIUS 3RT2 power contactor designed for switching motors and general industrial loads. Part of the modular SIRIUS system, this compact 3-pole contactor delivers reliable switching capacity with high contact reliability.

It is rated for AC-3e/AC-3, 32 A operational current, suitable for motors up to 15 kW at 400 V. Featuring a low-power 24 V DC control voltage coil and secure screw terminals, this Size S0 unit is an essential component for motor control and automation applications.

Key Specification

• Article Number: 3RT2027-1BB44-3MA0
• Product Type: Power Contactor (SIRIUS 3RT2)
• Main Poles: 3-pole (3 NO main contacts)
• Operating Current (AC-3/AC-3e, 400V): 32 A
• Operating Power (AC-3/AC-3e, 400V): 15 kW
• Control Coil Voltage: 24 V DC
• Auxiliary Contacts: 2 NO + 2 NC (Captive/Permanently Mounted)
• Connection Type (Main & Auxiliary): Screw Terminals
• Contactor Size: S0
• Surge Suppressor: Not retrofittable

Benefit

• High Reliability: Engineered as part of the SIRIUS modular system for consistent performance and long mechanical life (up to 10 million operating cycles).
• Space-Saving Design: Compact Size S0 footprint allows for efficient use of panel space.
• Integrated Monitoring: Features a captive auxiliary switch block (2 NO + 2 NC), simplifying wiring and reducing assembly complexity.
• Global Standard Compliance: Approved for worldwide use (e.g., IEC and UL/CSA) and is IE3/IE4-ready, supporting current efficiency standards.
• Secure & Easy Wiring: Robust screw terminals ensure secure, reliable connections for both main and control circuits.
• DC Coil Efficiency: The 24 V DC coil offers efficient power consumption for control circuit applications.

Function & Application

The Siemens 3RT2027-1BB44-3MA0 contactor is primarily used for:

1. Switching 3-Phase Motors: Ideal for starting and stopping electric motors up to 15 kW / 400 V.
2. General Resistive Loads: Switching non-inductive or lightly inductive AC-1 loads up to 50 A.
3. Integration into Load Feeders: Perfectly combinable with SIRIUS 3RV2 motor starter protectors and overload relays.
4. Automation Systems: Suitable for use in control panels, starter assemblies, and machinery requiring reliable low-voltage industrial control.

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