Siemens SIRIUS 3RT2036-1AD00 Power Contactor, 51A, 22kW, 42V AC, Size S2, 3-Pole, Screw Terminal Original Brand New

Overview: SIRIUS 3RT2036-1AD00 Power Contactor

The Siemens SIRIUS 3RT2036-1AD00 is a high-performance, 3-pole power contactor designed for switching motors and other electrical loads, forming a key component in modern industrial control systems. Part of the globally proven SIRIUS modular system, this size S2 contactor offers outstanding operational reliability and a compact design.

It is rated for an operational current of 51 A in AC-3/AC-3e duty at 400 V and a motor power of 22 kW. The device features a 42 V AC, 50 Hz control coil and is equipped with 1 NO (Normally Open) + 1 NC (Normally Closed) integrated auxiliary contacts, ensuring seamless integration and control. The robust screw terminals provide a secure and reliable connection.

Key Features & Technical Specification

• Product: Power Contactor (Motor Contactor)
• Manufacturer: Siemens
• Series: SIRIUS 3RT20
• Product Number (MLFB): 3RT2036-1AD00
• Size: S2
• Poles: 3-pole (3NO main contacts)
• Operational Current (AC-3e/AC-3): 51 A at 400 V
• Motor Power (AC-3e/AC-3): 22 kW at 400 V (Equivalent to 40 HP at 460V)
• Control Coil Voltage: 42 V AC, 50 Hz
• Auxiliary Contacts: 1 NO + 1 NC (Integrated)
• Terminal Type: Screw Terminal Connection
• Standards: IEC and UL/CSA Approved (IE3/IE4 Ready)

Benefit

• High Performance in Compact Design: Achieves high switching capacity (51 A / 22 kW) in the space-saving size S2 format.
• Global Reliability: Part of the Siemens SIRIUS modular system, approved for worldwide use and climate-resistant.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC contacts simplify wiring and system integration for signaling and interlocking.
• Secure Connection: Screw terminals offer a reliable, high-contact force connection, critical for high-current applications.
• Future-Proof: IE3/IE4 ready, ensuring compatibility with the latest high-efficiency motors.
• Reduced Complexity: Optimized for seamless combination with other SIRIUS components like overload relays and circuit breakers.

Function

The 3RT2036-1AD00 contactor functions as an electrically operated switch for a power circuit. When the 42 V AC control voltage is applied to the coil, it magnetically closes the three main power contacts, connecting the motor to the main supply. Simultaneously, the integrated 1 NO and 1 NC auxiliary contacts switch state, providing feedback on the contactor’s status to the control system (e.g., PLC or relays) and facilitating interlocking or sequencing operations. It is primarily used for the safe and frequent switching of three-phase squirrel-cage motors (AC-3/AC-3e duty).

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