🔹 Siemens SIRIUS 3RT2 Power Contactor – 3RT2036-1KB40 (AC-3 Duty, 3-Pole, 24V DC Coil, S2 Size, ~51A Class, 1NO+1NC Auxiliary, Varistor Protection)
The Siemens 3RT2036-1KB40 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable switching of motors and industrial loads under AC-3 / AC-3e duty applications. It belongs to the S2 frame size category, offering robust construction with high current handling capability, suitable for industrial control panels and power distribution systems.
This model features a 3-pole configuration with durable screw-type terminals, ensuring secure and stable wiring connections for long-term industrial use.
It is equipped with a 24V DC coil (KB40 variant) and is designed for direct PLC interface applications, making it highly suitable for modern automation systems and electronic control circuits.
A key highlight of this variant is the integrated varistor, which helps suppress switching surges and protects control electronics, improving reliability and extending service life.
It also includes integrated auxiliary contacts (1NO + 1NC), enabling feedback, interlocking, and control signal integration in complex automation systems.
Built on the Siemens SIRIUS modular system, it supports seamless integration with overload relays and accessories, allowing flexible and scalable panel design.
• Genuine Siemens SIRIUS 3RT2 Series Contactor
• Model: 3RT2036-1KB40
• 3-Pole heavy-duty switching design
• AC-3 / AC-3e duty optimized for motor control
• 24V DC coil (KB40 variant)
• S2 frame size (~51A class)
• Integrated varistor for surge suppression
• Screw terminal connection for secure wiring
• Auxiliary contacts: 1NO + 1NC
• Suitable for PLC-controlled automation systems
• High electrical and mechanical endurance
• Compatible with Siemens overload relays & accessories
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2036-1KB40 |
| Product Type | Power Contactor |
| Frame Size | S2 |
| Poles | 3 Pole |
| Utilization Category | AC-3 / AC-3e |
| Rated Current | ~51 A |
| Power Rating | ~22 kW @ 400V |
| Coil Voltage | 24V DC (KB40) |
| Auxiliary Contacts | 1NO + 1NC |
| Terminal Type | Screw Terminals |
| Mounting Type | Panel / DIN Rail (via accessories) |
| Special Feature | Integrated varistor |
| Brand | Siemens |
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