The Siemens 3RT2047-1NB30 is a high-performance SIRIUS 3RT2 Series power contactor designed for demanding motor control and industrial switching applications. This 3-pole contactor is rated for 110A AC-3 duty and supports motor loads up to 55kW at 400V, making it ideal for controlling large three-phase motors, pumps, compressors, conveyors, fans, and heavy-duty industrial machinery.
Equipped with a 20–33V AC/DC electronic coil (Variant NB30), the 3RT2047-1NB30 offers flexible control voltage operation and enhanced reliability in modern automation systems. The integrated varistor surge suppressor protects the control circuit from voltage spikes, improving operational stability and extending component life.
The contactor features 3 Normally Open (3NO) main contacts and 1 Normally Open (1NO) + 1 Normally Closed (1NC) auxiliary contacts as standard, enabling efficient motor control, signaling, interlocking, and monitoring functions without requiring additional auxiliary modules.
Built in the robust S3 frame size, the 3RT2047-1NB30 utilizes screw terminals for the main circuit and spring-loaded terminals for control and auxiliary circuits, ensuring secure wiring and simplified maintenance. The device is suitable for installation in motor control centers (MCCs), industrial control panels, process automation systems, OEM machinery, and manufacturing facilities.
Manufactured according to Siemens SIRIUS quality standards, the contactor offers a rated insulation voltage of 1000V, surge voltage resistance up to 8kV, and a mechanical service life of up to 10 million operating cycles, ensuring dependable long-term operation in harsh industrial environments. It operates reliably in temperatures ranging from -25°C to +60°C.
As part of the trusted Siemens SIRIUS 3RT2 contactor family, the 3RT2047-1NB30 provides efficient motor switching, high durability, and seamless integration with Siemens overload relays, motor starters, and industrial automation systems.
| Specification | Details |
|---|---|
| Product Name | Power Contactor |
| Brand | Siemens |
| Series | SIRIUS 3RT2 |
| Model Number | 3RT2047-1NB30 |
| SKU | 3RT2047-1NB30 |
| Product Type | Power Contactor |
| Utilization Category | AC-3e / AC-3 |
| Rated Operational Current (AC-3) | 110 A |
| Motor Rating at 400V | 55 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 |
| Frequency | 50/60 Hz |
| Integrated Protection | Varistor Surge Suppressor |
| Frame Size | S3 |
| Main Circuit Connection | Screw Terminals |
| Control Circuit Connection | Spring-Loaded Terminals |
| Rated Insulation Voltage (Ui) | 1000 V |
| Surge Voltage Resistance | 8 kV |
| Mechanical Life | Up to 10 Million Operations |
| Mounting Type | Panel Mount |
| Operating Temperature | -25°C to +60°C |
| Weight | Approx. 1.83 kg |
| Product Family | Siemens SIRIUS Contactors |
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