🔹 Siemens SIRIUS 3RT2 Power Contactor – 3RT2036-1NB30 (AC-3 Duty, 3-Pole, 24–33V AC/DC Coil, S2 Size, ~51A Class, 1NO+1NC Auxiliary, Varistor Integrated)
The Siemens 3RT2036-1NB30 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 strong current handling capacity with a compact and modular design suitable for industrial control panels and power distribution systems.
This model features a 3-pole configuration with durable screw-type terminals, ensuring secure wiring connections and long-term operational stability in demanding industrial environments.
It is equipped with a 24–33V AC/DC coil (NB30 variant), making it highly suitable for modern automation systems where both AC and DC control signals are used, especially PLC-based control architectures.
A key highlight of this variant is the integrated varistor, which helps suppress switching surges and protects control circuits from voltage spikes, improving reliability and equipment lifespan.
It also includes integrated auxiliary contacts (1NO + 1NC), providing feedback, interlocking, and status indication for industrial control systems.
Built on the Siemens SIRIUS modular platform, it supports seamless integration with overload relays and accessories, enabling flexible and scalable panel design.
• Genuine Siemens SIRIUS 3RT2 Series Contactor
• Model: 3RT2036-1NB30
• 3-Pole heavy-duty switching design
• AC-3 / AC-3e duty optimized for motor control applications
• 24–33V AC/DC coil (NB30 variant)
• S2 frame size (~51A class)
• Integrated varistor for surge protection
• Screw terminal connection for secure wiring
• Auxiliary contacts: 1NO + 1NC
• Suitable for PLC & automation control systems
• High electrical and mechanical endurance
• Compatible with Siemens overload relays & accessories
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2036-1NB30 |
| 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 | 24–33V AC/DC (NB30) |
| Auxiliary Contacts | 1NO + 1NC |
| Terminal Type | Screw Terminals |
| Special Feature | Integrated varistor |
| Mounting Type | Panel / DIN Rail (via accessories) |
| Brand | Siemens |
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