Siemens 3RT1375-6AR36 Power Contactor: Robust Switching for Industrial Application
The Siemens 3RT1375-6AR36 is a high-performance 4-pole power contactor designed for reliable switching of AC-1 category loads up to 525 A at 400 V and 40 °C. Part of the SIRIUS 3RT13 series, this S12 size contactor is engineered for demanding industrial environments, offering exceptional durability and compliance with international standards.
Key Features and Benefit
- High Current Capacity: Rated for 525 A (AC-1), making it ideal for switching resistive and non-inductive loads.
- Versatile Coil Voltage: Features a wide-range solid-state operating mechanism that accepts both 250-500 V AC and DC control supply voltages, simplifying inventory and application.
- Integrated Auxiliary Contacts: Equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts for flexible control and signaling circuits.
- Robust Connection Options: Offers connection rail and screw terminals for main circuits, accommodating cable lugs or flexible/rigid busbars, ensuring secure and adaptable installations.
- Enhanced Protection: The 3RT13 contactors are supplied with a built-in varistor for coil damping, providing protection against overvoltage surges in the control supply voltage connection and extending coil lifespan.
- Standards Compliant: Meets rigorous international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), guaranteeing performance and safety.
- Reliable Auxiliary Contacts: Auxiliary contacts offer high contact reliability for switching low voltages (≤ 110 V) and currents (≤ 100 mA), suitable for solid-state circuits.
- Motor Protection Integration: Compatible with 3RB2 electronic overload relays for comprehensive motor protection when used in motor feeder applications.
- Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring stable operation in industrial settings.
Application
The Siemens 3RT1375-6AR36 contactor is perfectly suited for a wide range of applications, including:
- Four-pole switching of weak or non-inductive loads (AC-1)
- Disconnecting loads or power generation plants from the grid
- Transfer switching applications
Protection and Installation:
Proper protection of all connections against short circuit, overload, and overvoltage is essential. Refer to the technical product data sheet for specific short-circuit and overload protection details for free-standing contactors. For load feeder combinations, consult the Digital or standard Configuration Manuals for load feeders.
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