Siemens Power contactor, AC-3e/AC-3, 3-pole, 22kW/400V, 24VDC, 51A Part number 3RT2036-3KB44-3MA0

Product Overview

The Siemens 3RT2036-3KB44-3MA0 is a SIRIUS 3RT2 series 3-pole power contactor designed for heavy industrial motor control applications. It is rated for AC-3 duty at 51 A and 22 kW (at 400 V), with a 24 V DC coil and integrated varistor for coil surge protection. This robust contactor supports high performance switching of motors and loads in demanding environments.

Key Features

• 3-pole power contactor from the SIRIUS 3RT2 family
• Rated AC-3 current: 51 A (400 V) and rated power: 22 kW
• Coil: 24 V DC with integrated varistor for surge suppression
• Main contacts: screw-type terminals; auxiliary and control circuits: spring-loaded terminals
• Auxiliary contacts included: 2 NO + 2 NC for control or feedback functions
• Size designation: S2 — compact yet high-capacity
• Ambient operating temperature from –25 °C to +60 °C, suitable for industrial use

Technical Specifications

• Product Series: SIRIUS 3RT2 Power Contactor
• Article Number: 3RT2036-3KB44-3MA0
• Number of Poles: 3
• Rated Operational Current (AC-3, 400 V): 51 A
• Rated Power (AC-3, 400 V): 22 kW
• Control Supply Voltage (Us): 24 V DC
• Contact Configuration (auxiliary): 2 NO + 2 NC
• Main Circuit Connection: Screw-type terminals
• Size Frame: S2
• Ambient Operating Temperature: –25 °C … +60 °C
• Insulation Voltage (Ui): 690 V

Compliance & Certifications

• Designed and manufactured by Siemens in compliance with IEC/EN standards for industrial contactors
• Built for high-duty motor switching and automation tasks in industrial environments

Applications

Ideal for use in motor starters, conveyor systems, pumps, compressors and other heavy-load equipment requiring reliable switching in industrial automation settings. Suitable for installation in manufacturing plants, infrastructure systems and any application where a 22 kW motor (400 V) needs control and protection.