The Siemens 3RT1075-6CP308K is a high-current SIRIUS 3RT power contactor designed for industrial motor switching, machine control and automation applications. It features mirror contacts, screw terminals and an AC coil, making it suitable for motor-control systems where reliable switching and auxiliary status feedback are required.
The product is listed as a 3-pole SIRIUS power contactor with a 400 A current rating and 220–240 V AC coil.
The 3RT1075-6CP308K belongs to the Siemens SIRIUS 3RT family of power contactors used for switching and controlling electrical loads in industrial systems.
Its high-current design makes it suitable for applications involving large motors and industrial electrical loads.
Typical applications include:
The contactor should be selected according to the motor or load current, utilization category, operating voltage and application requirements.
The 3RT1075-6CP308K is listed with a 400 A current rating and is associated with high-power SIRIUS 3RT motor-control applications.
This makes it suitable for demanding industrial motor-control systems where a robust contactor is required.
Potential applications include:
The actual application must be checked against the required utilization category and motor characteristics.
The 3RT1075-6CP308K is specified with mirror-contact functionality.
Mirror contacts can provide auxiliary information related to the state of the main contacts and can be used in suitable monitoring and control circuits.
Typical applications include:
The complete safety function must be designed according to the applicable machine-control and safety requirements.
The contactor uses screw terminals for the control and auxiliary connections. Siemens documentation for this 3RT family identifies screw-terminal connections for auxiliary and control circuits, while the high-current main circuit uses connection bars in the corresponding configuration.
Screw terminals provide a familiar connection method for industrial panel builders and maintenance teams.
The 3RT1075-6CP308K is specified with an AC coil, with available product listings identifying a 220–240 V AC coil for this model.
This makes it suitable for compatible industrial control circuits using the specified coil supply.
Always verify the coil voltage against the product marking and installation documentation before energizing the contactor.
The corresponding 3RT1075 configuration is available with 2 NO + 2 NC auxiliary contacts, providing additional flexibility for control and monitoring circuits.
Auxiliary contacts can be used for:
This allows the contactor to be integrated into automated motor-control systems.
The 3RT1075-6CP308K can be incorporated into a complete motor-control system alongside:
A typical arrangement can be:
Control System → Contactor Coil → Main Contacts → Motor
Auxiliary contacts can provide feedback and interlocking signals to the control system.
The Siemens 3RT1075-6CP308K can be used in:
For related Siemens industrial electrical and automation products, customers can explore the Siemens product range at SB Smart.
The 3RT1075-6CP308K is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals.
Its combination of high-current switching, mirror contacts, screw-terminal connections and AC coil operation makes it suitable for demanding industrial motor-control systems.
The Siemens 3RT1075-6CP308K combines high-current motor switching, mirror contacts, screw terminals and an AC coil in a Siemens SIRIUS 3RT power contactor.
With its 400 A current rating and 220–240 V AC coil, it is suitable for high-power industrial motor-control applications when correctly selected for the load and utilization category.
For OEMs, panel builders and automation integrators, it provides a practical solution for high-current motor switching, interlocking and control-system feedback.
SB Smart supplies Siemens industrial electrical and automation products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and all major cities across India.
Delivery support is available for:
It is a Siemens SIRIUS 3RT power contactor with mirror contacts, screw terminals and an AC coil.
The available product listing identifies the contactor with a 400 A current rating.
Yes. The product description specifies mirror contacts.
It uses screw terminals for control and auxiliary connections in the corresponding 3RT1075 configuration.
Available product listings identify a 220–240 V AC coil.
Yes. It is a SIRIUS power contactor intended for industrial motor-switching and control applications.
Yes. Auxiliary contacts can provide suitable feedback, interlocking and control signals within a properly designed PLC-based system.
It can be used in large motor starters, conveyors, pumps, compressors, production machinery and industrial automation systems.
They can support monitoring of the main-contact state in suitable control, diagnostic and safety-related circuits.
You can explore the Siemens product range at SB Smart for Siemens SIRIUS power contactors, overload relays, motor-control components and other industrial automation products
| Specification | Details |
|---|---|
| Product Name | Power Contactor |
| Manufacturer | Siemens |
| Series | SIRIUS 3RT |
| Order Code | 3RT1075-6CP308K |
| Product Type | Power Contactor |
| Number of Main Poles | 3 Pole |
| Main Contact Configuration | 3 NO |
| Auxiliary Contacts | 2 NO + 2 NC |
| Coil Type | AC Coil |
| Coil Voltage | 277 V AC |
| Control Frequency | 50/60 Hz |
| Frame Size | S12 |
| Rated Operational Current (AC-3) | 400 A |
| Rated Operational Current (AC-1) | 600 A |
| Motor Rating @ 400V | Up to 200 kW |
| Rated Operational Voltage | Up to 1000 V AC |
| Terminal Type | Screw Terminals |
| Main Circuit Connection | Busbar |
| Mirror Contact Elements | Yes |
| Mechanical Life | Up to 10 Million Operations |
| Mounting Type | Panel Mount |
| Protection Class | IP00 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
| Condition | New & Genuine Product |
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