🔹 Siemens SIRIUS 3RT2 Power Contactor – 3RT2037-1AL208K (AC-3 Duty, 3-Pole, 230V AC Coil, S2 Size, ~65A Class, 1NO + 1NC Auxiliary)
The Siemens 3RT2037-1AL208K is a heavy-duty 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 high current capacity and robust construction for demanding industrial control and power distribution systems.
This model features a 3-pole configuration with durable screw-type terminals, ensuring secure wiring connections and long operational reliability in industrial environments.
It is equipped with a 230V AC coil (AL208K variant), making it suitable for standard industrial control circuits used in motor starters, control panels, and automation systems.
A key feature of this variant is the integrated auxiliary contact (1NO + 1NC), which provides reliable feedback, interlocking, and control signal integration for safe system operation.
Built on the Siemens SIRIUS modular platform, it allows seamless integration with overload relays and accessory modules, enabling flexible and scalable panel design.
With strong electrical endurance, high switching capacity, and stable performance under frequent operations, this contactor is well-suited for industrial applications.
• Genuine Siemens SIRIUS 3RT2 Series Contactor
• Model: 3RT2037-1AL208K
• 3-Pole heavy-duty switching design
• AC-3 / AC-3e duty optimized for motor control applications
• 230V AC coil (AL208K variant)
• S2 frame size (~65A class)
• Screw terminal connection for secure wiring
• Integrated auxiliary contacts: 1NO + 1NC
• High electrical and mechanical endurance
• Compatible with Siemens overload relays & accessories
• Suitable for industrial automation systems
• Modular and scalable panel design
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2037-1AL208K |
| Product Type | Power Contactor |
| Frame Size | S2 |
| Poles | 3 Pole |
| Utilization Category | AC-3 / AC-3e |
| Rated Current | ~65 A |
| Power Rating | ~30 kW @ 400V |
| Coil Voltage | 230V AC (AL208K) |
| Auxiliary Contacts | 1NO + 1NC |
| Terminal Type | Screw Terminals |
| Mounting Type | Panel / DIN Rail (via accessories) |
| Brand | Siemens |
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