🔹 Siemens SIRIUS 3RT2 Power Contactor – 3RT2027-1KB40 (AC-3 Duty, 3-Pole, 24V DC Coil, S0 Size, 32A Class, 1NO+1NC Auxiliary, Coupling Contactor Type)
The Siemens 3RT2027-1KB40 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable switching of motors and industrial loads under AC-3 duty applications. It belongs to the S0 frame size category, offering a compact and robust design suitable for industrial control panels and automation systems.
This model features a 3-pole configuration with durable screw-type terminals, ensuring secure wiring connections and long-term stability in demanding electrical environments.
It is equipped with a 24V DC coil variant (KB40) and is designed as a coupling contactor type, optimized for direct PLC output compatibility and reliable electronic control operation.
A key feature of this variant is its integrated auxiliary contact configuration (1NO + 1NC) along with an integrated varistor, ensuring safe coil switching and improved surge protection during operation.
Built on the Siemens SIRIUS modular platform, it allows seamless integration with overload relays and accessory modules, enabling flexible and scalable panel design for modern industrial requirements.
With high electrical endurance, strong switching capability, and stable performance under frequent operations, this contactor ensures dependable operation in industrial environments.
• Genuine Siemens SIRIUS 3RT2 Series Contactor
• Model: 3RT2027-1KB40
• 3-Pole heavy-duty switching design
• AC-3 duty optimized for motor control applications
• 24V DC coil (KB40 variant)
• Coupling contactor for PLC output compatibility
• Integrated varistor for coil protection
• S0 frame size (32A class)
• Screw terminal connection for secure wiring
• Integrated auxiliary contacts (1NO + 1NC)
• High electrical and mechanical endurance
• Suitable for industrial automation systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2027-1KB40 |
| Product Type | Power Contactor |
| Frame Size | S0 |
| Poles | 3 Pole |
| Utilization Category | AC-3 / AC-3e |
| Rated Current | ~32 A |
| Power Rating | ~15 kW @ 400V |
| Coil Voltage | 24V DC (KB40) |
| Auxiliary Contacts | 1NO + 1NC |
| Terminal Type | Screw Terminals |
| Special Feature | Coupling contactor, integrated varistor |
| Mounting Type | Panel / DIN Rail (via accessories) |
| Brand | Siemens |
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