Siemens 3RT2036-1AH04 Power Contactor, 51A, 48V AC, 2NO+2NC, S2 Original Brand New

Overview: Siemens SIRIUS 3RT2036-1AH04 Power Contactor

The Siemens 3RT2036-1AH04 is a high-performance, 3-pole power contactor from the robust SIRIUS 3RT20 series. Engineered for switching motors and other loads up to 22 kW / 400 V (AC-3e/AC-3), this device ensures reliable and safe operation in demanding industrial automation applications. Its compact Size S2 design and integrated features make it an ideal component for efficient motor starters and load feeders.

Key Specifications

• Product Type: Power Contactor (3RT20)
• Manufacturer Part No.: 3RT2036-1AH04
• Main Current Rating (AC-3e/AC-3): 51 A
• Rated Power: 22 kW at 400 V
• Poles: 3-pole
• Coil Control Voltage: 48 V AC, 50 Hz
• Auxiliary Contacts: 2 NO + 2 NC (integrated and removable auxiliary switch block)
• Terminal Type: Screw Terminal
• Size: S2
• Product Family: SIRIUS 3RT Contactors

Function

The SIRIUS 3RT2036-1AH04 acts as an electrically operated switch, primarily used for remotely controlling the power to an electric motor. It safely connects and disconnects the main power circuit. The integrated auxiliary contacts (2 NO + 2 NC) provide essential feedback for control circuits, enabling monitoring and interlocking functions, which are critical for safe and complex switching sequences. The removable auxiliary switch provides flexibility for maintenance and adaptation.

Benefits & Features

• High Performance: Rated for up to 51 A and 22 kW, suitable for medium-power motor applications.
• Versatile Control: Operates with a standard 48V AC control voltage, common in industrial settings.
• Enhanced Reliability: Part of the globally-approved Siemens SIRIUS modular system, known for high contact reliability and robust performance.
• Integrated Signaling: Includes a 2 NO + 2 NC auxiliary switch block for comprehensive status signaling and interlocking.
• Easy Installation: Features dependable screw terminal connections for the main and auxiliary circuits.
• Space-Saving Design: Optimized Size S2 dimensions allow for efficient panel layout.
• Worldwide Usability: Climate-resistant and approved according to major international standards (IEC, UL/CSA, etc.).
• IE3/IE4 Ready: Optimized for use with high-efficiency motors.

Application

The Siemens 3RT2036-1AH04 contactor is perfect for use in:

• Motor starters (Direct-on-line, Reversing, Star-Delta combinations)
• Switching resistive loads
• Industrial automation and control panels
• HVAC systems
• Pumps, fans, and conveyor systems

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