Siemens SIRIUS 3RT2036-1SB30 Power Contactor 51A, 22kW, 21-33V AC/DC, Size S2 with Integrated Varistor and F-PLC-IN Original Brand New

Overview

The Siemens SIRIUS 3RT2036-1SB30 is a high-performance power contactor designed for the reliable switching of motors and other electrical loads up to 51 A. Part of the renowned SIRIUS series, this compact and robust device offers exceptional efficiency and durability in industrial automation environments.

Its versatility is highlighted by a wide control voltage range of 21-33 V AC/DC and a unique F-PLC-IN input, making it perfectly suited for modern safety-related applications. The integrated varistor provides superior protection against voltage peaks, ensuring a longer lifespan for the coil and other connected components. With its size S2 form factor and convenient screw terminals, installation is both simple and secure.

Technical Specification

• Product Type: Power Contactor
• Part Number: 3RT2036-1SB30
• Brand: Siemens
• Series: SIRIUS 3RT
• Rated Operational Current (AC-3e/AC-3): 51 A (at 400 V)
• Rated Power (AC-3): 22 kW (at 400 V)
• Number of Poles: 3
• Control Supply Voltage: 21-33 V AC/DC (50/60 Hz)
• Auxiliary Contacts: 1 NC (Normally Closed)
• Terminal Type: Screw Terminal
• Size: S2
• Special Features: Integrated varistor, F-PLC-IN (for safety applications)
• Mounting: Snap-on and screw mounting on 35mm DIN rail

Key Features & Benefit

• Reliable Performance: Rated for demanding AC-3e/AC-3 applications, ensuring stable and consistent motor switching.
• Wide Voltage Range: The 21-33 V AC/DC control voltage allows for flexible integration into various control systems.
• Enhanced Coil Protection: The built-in varistor protects the coil from damaging overvoltage spikes, extending the contactor’s service life and reducing maintenance costs.
• Optimized for Safety: The F-PLC-IN input is specifically designed for connection to safety PLC outputs, making it an essential component for safety-critical circuits.
• Space-Saving Design: The compact Size S2 form factor helps save valuable space within control cabinets.
• Easy Installation: Features both snap-on and screw mounting options, along with secure screw terminals for a reliable electrical connection.
• High Durability: Engineered by Siemens for long-term operational reliability in harsh industrial environments.

Function

The Siemens 3RT2036-1SB30 functions as an electromagnetic switch. When the control coil is energized with a voltage between 21-33 V AC/DC, it generates a magnetic field that pulls the main contacts closed, allowing power to flow to the connected motor. The integrated F-PLC-IN feature allows the coil to be controlled directly from a fail-safe PLC, providing a safe and reliable method for shutting down power to a load in an emergency. The single normally closed (NC) auxiliary contact can be used for feedback signals or interlocking circuits, enhancing the functionality of the overall system.

Application

This contactor is an ideal choice for a wide range of industrial applications, including:

• Motor control for pumps, fans, conveyors, and compressors
• Switching of electrical heaters and transformers
• Integration into safety circuits with fail-safe PLCs
• General industrial automation and machine control
• HVAC systems and building automation

For more Siemens SIRIUS products, including complementary overload relays and circuit breakers, visit our website.