The Siemens 3RT2047-1AL208K is a premium SIRIUS 3RT2 Series power contactor designed for efficient switching and protection of three-phase motors in industrial automation and motor control applications. Built for AC-3 duty, this 3-pole contactor offers a rated operational current of 110A and supports motor loads up to 55kW at 400V, making it ideal for compressors, pumps, conveyors, HVAC equipment, fans, and heavy-duty industrial machinery.
Equipped with a 230V AC operating coil (Variant AL208K), the contactor provides reliable switching performance and stable operation in demanding industrial environments. The unit features 3 Normally Open (3NO) main contacts and 1 Normally Open (1NO) + 1 Normally Closed (1NC) integrated auxiliary contacts, allowing easy implementation of control, signaling, monitoring, and interlocking functions.
The 3RT2047-1AL208K is manufactured in the robust S3 frame size and utilizes screw terminal connections for secure wiring, easy installation, and simplified maintenance. Its compact design allows efficient integration into motor control centers (MCCs), industrial control panels, switchboards, OEM equipment, and process automation systems.
Designed according to Siemens SIRIUS quality standards, the contactor provides a rated insulation voltage of 1000V, excellent electrical endurance, and a mechanical service life of up to 10 million operating cycles. The rugged construction ensures dependable long-term performance even in harsh industrial operating conditions.
The AL208K coil variant incorporates integrated suppression circuitry, helping reduce switching transients and improving the protection of sensitive control electronics. This contributes to improved operational reliability and extended service life of associated control components.
As part of the trusted Siemens SIRIUS 3RT2 contactor family, the 3RT2047-1AL208K delivers high switching capacity, reliable motor control, 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 | 3RT2047-1AL208K |
| SKU | 3RT2047-1AL208K |
| Product Type | Power Contactor |
| Utilization Category | 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 | 230 V AC |
| Coil Variant | AL208K |
| Frequency | 50/60 Hz |
| Frame Size | S3 |
| Terminal Type | Screw Terminals |
| Rated Insulation Voltage (Ui) | 1000 V |
| Mechanical Life | Up to 10 Million Operations |
| Integrated Suppression | Yes |
| 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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