The Siemens 3RT2038-1NB30 is a robust SIRIUS 3RT2 Series power contactor designed for reliable motor switching and industrial automation applications. Engineered for AC-3 duty, this 3-pole contactor is suitable for controlling three-phase motors, pumps, compressors, conveyors, fans, HVAC systems, and other industrial loads requiring dependable switching performance.
The contactor features a 20–33V AC/DC electronic operating coil (Variant NB30) with an integrated varistor surge suppressor, providing excellent protection against voltage spikes and switching transients while improving overall system reliability. Siemens NB30 coil variants are designed for flexible AC/DC control voltage operation and enhanced durability in industrial environments.
Equipped with 3 Normally Open (3NO) main contacts and 1 Normally Open (1NO) + 1 Normally Closed (1NC) auxiliary contacts, the 3RT2038-1NB30 enables efficient motor control, signaling, monitoring, and interlocking functions without additional accessories. The integrated auxiliary contacts simplify panel design and reduce installation costs.
Built in the compact and rugged S2 frame size, the contactor utilizes durable screw terminal connections for secure conductor termination, easy installation, and simplified maintenance. Its compact footprint makes it ideal for motor control centers (MCCs), industrial control panels, OEM machinery, manufacturing plants, and process automation systems.
Manufactured according to Siemens SIRIUS quality standards, the contactor offers high electrical endurance, a rated insulation voltage up to 690V, and a mechanical service life of up to 10 million operating cycles, ensuring dependable long-term operation in demanding industrial environments. Similar S2-series NB30 contactors feature these performance characteristics and integrated varistor protection.
As part of the trusted Siemens SIRIUS 3RT2 contactor family, the 3RT2038-1NB30 delivers reliable motor control, operational efficiency, and seamless compatibility with Siemens overload relays, motor starters, auxiliary contact blocks, and industrial automation products.
| Specification | Details |
|---|---|
| Product Name | Power Contactor |
| Brand | Siemens |
| Series | SIRIUS 3RT2 |
| Model Number | 3RT2038-1NB30 |
| SKU | 3RT2038-1NB30 |
| Product Type | Power Contactor |
| Utilization Category | AC-3 |
| Rated Operational Current (AC-3) | 80 A |
| Motor Rating at 400V | 37 kW |
| Number of Poles | 3 Pole |
| Main Contacts | 3 NO |
| Auxiliary Contacts | 1 NO + 1 NC |
| Coil Voltage | 20–33 V AC/DC |
| Coil Variant | NB30 |
| Coil Type | Electronic Coil |
| Integrated Protection | Varistor Surge Suppressor |
| Frame Size | S2 |
| Terminal Type | Screw Terminals |
| Rated Insulation Voltage (Ui) | 690 V |
| Protection Class | IP20 |
| Mechanical Life | Up to 10 Million Operations |
| Mounting Type | Panel Mount |
| Operating Temperature | -25°C to +60°C |
| Application | Motor Control & Industrial Switching |
| Product Family | Siemens SIRIUS Contactors |
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