🔹 Siemens SIRIUS 3RT2 Power Contactor – 3RT2028-1AC208K (AC-3 Duty, 3-Pole, 24V AC Coil, S0 Size, 38A Class, 3NO Auxiliary)
The Siemens 3RT2028-1AC208K is a high-capacity 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 enhanced current handling capability with compact modular construction suitable for industrial control panels.
This model features a 3-pole configuration with durable screw-type terminals, ensuring secure and vibration-resistant wiring connections for stable long-term performance in electrical systems.
It is equipped with a 24V AC coil variant (AC208K), making it suitable for standard industrial control circuits used in motor starters, distribution panels, and automation systems.
A key feature of this variant is its integrated auxiliary contact configuration (3NO), providing reliable feedback and control signal integration in complex electrical and automation setups.
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 strong electrical endurance, high switching capacity, and long mechanical life, this contactor ensures dependable operation in demanding industrial environments.
• Genuine Siemens SIRIUS 3RT2 Series Contactor
• Model: 3RT2028-1AC208K
• 3-Pole heavy-duty switching design
• AC-3 duty optimized for motor control applications
• 24V AC coil (AC208K variant)
• S0 frame size (38A class)
• Screw terminal connection for secure wiring
• Integrated auxiliary contacts (3NO)
• Compact modular design for panel integration
• High electrical and mechanical endurance
• Compatible with Siemens overload relays & accessories
• Suitable for industrial automation systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2028-1AC208K |
| Product Type | Power Contactor |
| Frame Size | S0 |
| Poles | 3 Pole |
| Utilization Category | AC-3 Duty |
| Rated Current | ~38 A |
| Power Rating | ~18.5 kW @ 400V |
| Coil Voltage | 24V AC (AC208K) |
| Auxiliary Contacts | 3NO |
| Terminal Type | Screw Terminals |
| Mounting Type | Panel / DIN Rail (via accessories) |
| Brand | Siemens |
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