Overview
The Siemens 3RT2036-3XB44-0LA2 is a high-performance traction contactor designed for industrial and railway applications. Engineered for efficiency and reliability, this 3-pole contactor supports AC-3e/AC-3 operation at 51 A and 22 kW / 400 V. With a solid-state operating mechanism, integrated varistor, and flexible auxiliary contact configuration, it ensures smooth and safe switching for demanding electrical systems. Its compact S2 frame size and removable auxiliary switch make installation and maintenance easy.
Key Features & Functions
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Rated Current & Power: 51 A, 22 kW / 400 V suitable for medium-voltage traction applications
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Operating Mechanism: Solid-state for faster response and higher reliability
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Auxiliary Contacts: 2 NO + 2 NC for versatile control and signaling options
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Terminals: Main circuit with screw terminals, control and auxiliary circuits with spring-loaded terminals
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Frame Size: S2 for space-efficient installation
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Varistor Integration: Provides protection against voltage spikes and enhances operational safety
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Removable Auxiliary Switch: Simplifies maintenance and replacement
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Control Voltage: 24 V DC, adjustable operation from 0.7 to 1.25*Uc
Benefits
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High Reliability: Solid-state mechanism ensures consistent performance over long operational life
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Energy Efficiency: Minimal energy loss during switching
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Durability: Integrated varistor protects against voltage spikes and electrical stress
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Flexible Installation: Compact frame size and removable auxiliary switch for easy replacement and upgrades
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Enhanced Safety: Screw and spring-loaded terminals ensure secure electrical connections
Applications
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Railway traction systems
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Industrial motor control
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Heavy machinery requiring high-current switching
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AC-3e / AC-3 rated electrical circuits
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