Siemens 3RT1374-6AP36 SIRIUS Power Contactor AC-1, 500A, 4-Pole, 100-250V AC/DC, S12 Original Brand New

Overview

The Siemens 3RT1374-6AP36 is a robust 4-pole SIRIUS power contactor designed for reliable switching of non-inductive or weakly inductive loads (AC-1). Rated for 500A at 400V and 40°C, this high-performance contactor features a wide-range solid-state operating mechanism that supports both 100-250V AC and DC control voltages. Equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, it offers versatile control options. The 3RT1374-6AP36 comes with connecting rails for main circuit connections, compatible with cable lugs, flexible, or rigid busbars, and screw terminals for auxiliary and control circuits. Integrated varistor coil damping ensures enhanced protection against overvoltage. This contactor is ideal for applications requiring robust load disconnection, power generation plant integration, or transfer switching.

Key Features & Function

• High-Current AC-1 Switching: Specifically designed for switching non-inductive or weakly inductive loads up to 500A at 400V, making it suitable for heating, lighting, and distribution applications.
• 4-Pole Design: Provides comprehensive control and isolation for multi-phase systems or applications requiring four independent switching points.
• Wide-Range Solid-State Operating Mechanism: Flexible control with a universal input voltage of 100-250V AC/DC, reducing inventory and simplifying design.
• Integrated Auxiliary Contacts (2 NO + 2 NC): Offers essential feedback and control capabilities for interlocking, signaling, and sequence control.
• Robust Connection Methods: Main circuit connections via connecting rails accommodate cable lugs, flexible busbars, or rigid busbars, ensuring secure and high-capacity current transfer. Auxiliary and control circuits utilize reliable screw terminals.
• Built-in Varistor Damping: Protects the control circuit and extends coil life by suppressing opening surges in the coil.
• Compliance with International Standards: Meets IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (auxiliary switches) for global applicability and safety.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in industrial settings.
• High Contact Reliability: Auxiliary contacts are optimized for low-voltage/low-current switching (e.g., PLC inputs), guaranteeing dependable signal transmission.
• Compatibility with Overload Relays: Seamless integration with Siemens 3RB2 electronic overload relays for comprehensive motor protection (when used in motor applications).

Benefit

• Enhanced Reliability: Robust design, integrated surge protection, and high contact reliability ensure long-term, trouble-free operation.
• Flexible Application: Versatile AC-1 rating, 4-pole configuration, and wide-range control voltage make it adaptable to diverse industrial and commercial applications.
• Simplified Installation & Maintenance: User-friendly connection methods and robust construction facilitate quick setup and minimize downtime.
• Cost-Effective Solution: Durable components and high performance contribute to a lower total cost of ownership.
• Global Standard Compliance: Adherence to IEC standards allows for use in international projects and systems.
• Optimized System Integration: Designed to integrate seamlessly with other Siemens SIRIUS control components for complete automation solutions.

Application

The Siemens 3RT1374-6AP36 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1), such as heating elements, lighting systems, and distribution circuits.
• Disconnecting loads or power generation plants from the grid.
• Transfer switching applications in power distribution.

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