The Siemens 3RT2046-1NB30 is a high-performance SIRIUS 3RT2 Series power contactor engineered for reliable motor switching and industrial control applications. Designed for AC-3 duty, this 3-pole contactor is rated for 95A operational current and supports motor ratings up to 45kW at 400V, making it ideal for pumps, compressors, conveyors, fans, HVAC systems, and heavy-duty industrial machinery.
Equipped with a 20–33V AC/DC electronic operating coil (Variant NB30), the 3RT2046-1NB30 offers flexible control voltage compatibility and dependable operation in modern automation systems. The electronic coil design provides reduced power consumption, improved tolerance to voltage fluctuations, and enhanced operational reliability in demanding industrial environments.
The contactor features 3 Normally Open (3NO) main contacts and 1 Normally Open (1NO) + 1 Normally Closed (1NC) integrated auxiliary contacts as standard. These auxiliary contacts enable efficient control, signaling, monitoring, and interlocking functions without requiring additional accessories, helping to simplify panel design and reduce installation costs.
Built in the robust S3 frame size, the 3RT2046-1NB30 utilizes durable screw terminal connections for secure conductor termination and easy maintenance. Its compact yet rugged construction makes it suitable for motor control centers (MCCs), industrial control panels, OEM machinery, process automation systems, water treatment plants, and manufacturing facilities.
Manufactured according to Siemens SIRIUS quality standards, the contactor offers a rated insulation voltage of 1000V, excellent switching endurance, and a mechanical service life of up to 10 million operating cycles. The integrated surge suppression feature helps protect control circuits from voltage transients and improves overall system reliability.
As part of the trusted Siemens SIRIUS 3RT2 contactor family, the 3RT2046-1NB30 provides efficient motor switching, dependable performance, 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 | 3RT2046-1NB30 |
| SKU | 3RT2046-1NB30 |
| Product Type | Power Contactor |
| Utilization Category | AC-3 |
| Rated Operational Current (AC-3) | 95 A |
| Motor Rating at 400V | 45 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 |
| Frequency | 50/60 Hz |
| Frame Size | S3 |
| Terminal Type | Screw Terminals |
| Rated Insulation Voltage (Ui) | 1000 V |
| Integrated Surge Suppression | Yes |
| 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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