Siemens 3RT2036-1XB40-0LA2 Traction Contactor, 51A, 24V DC, S2 Original Brand New

Overview

The Siemens 3RT2036-1XB40-0LA2 is a high-performance, 3-pole SIRIUS 3RT2 traction contactor specifically designed for reliable operation in demanding applications, particularly within the railway industry. This robust Size S2 contactor is engineered for switching motors under the AC-3e/AC-3 utilization categories, handling a rated operational current (Ie​) of 51 A and a maximum motor power of 22 kW at 400 V.

It features an advanced solid-state operating mechanism that supports a wide control supply voltage range (0.7 to 1.25×Uc​) and operates on a 24 V DC coil. Safety and durability are enhanced by the inclusion of an integrated varistor for surge suppression, and its standard configuration includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, all connected via reliable screw terminals.

Benefit

1. High Reliability in Tough Conditions: Engineered as a “Traction Contactor,” this unit is built to withstand the shock, vibration, and stringent requirements of railway and similar heavy-duty DC applications, leading to reduced downtime.
2. Stable Control Operation: The solid-state operating mechanism and wide voltage tolerance (0.7 to 1.25×Uc​) ensure dependable switching performance, even with unstable control power.
3. Simplified Installation and Protection: The integrated varistor eliminates the need for external surge suppressors, saving wiring time and panel space while ensuring coil protection.
4. Flexible Integration: The inclusion of both normally open (NO) and normally closed (NC) auxiliary contacts provides out-of-the-box flexibility for signaling and safety circuits.
5. Globally Recognized Quality: As a Siemens SIRIUS product, the 3RT2036-1XB40-0LA2 guarantees world-class engineering, long service life, and adherence to international industrial standards.

Function and Application

The Siemens 3RT2036-1XB40-0LA2 functions as a remotely controlled electrical switch, primarily used for switching AC loads, particularly electric motors. Its specific design as a traction contactor makes it the perfect fit for applications where robust performance and resistance to environmental stress are critical.

• Primary Application: Controlling three-phase AC motors (up to 22 kW / 400 V) in rolling stock, rail infrastructure, and other systems requiring DC coil control and high vibration resistance.
• Secondary Applications: High-reliability industrial machinery, maritime equipment, demanding material handling systems, and general industrial control where a stable $24\text{ V DC}$ control circuit is used.

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