The Siemens 3RT1076-6CF308K is a high-capacity SIRIUS 3RT power contactor designed for industrial motor switching and automation applications. It is a 3-pole contactor with mirror-contact functionality, screw terminals for control and auxiliary circuits, and an AC coil. Available product information identifies this model with an AC-3/AC-3e rating of 500 A at 400 V and a 220–240 V AC/DC control supply.
The 3RT1076-6CF308K belongs to the Siemens SIRIUS 3RT family of power contactors used for switching and controlling electrical loads in industrial systems.
Its high-current configuration makes it suitable for demanding motor-control applications where reliable switching and a robust contactor design are required.
Typical applications include:
The correct contactor selection should always be based on the motor/load current, utilization category, operating voltage and application duty.
Available product information specifies the 3RT1076-6CF308K for AC-3/AC-3e applications up to 500 A, with a corresponding motor rating of up to 250 kW at 400 V.
This makes the contactor suitable for large industrial motors and other applications requiring high-current switching.
Potential applications include:
The product description specifies mirror contacts, a feature useful in control and monitoring circuits where the state of the auxiliary contact needs to correspond reliably with the main contact condition.
Mirror contacts can support applications involving:
Siemens documentation notes mirror-contact characteristics for SIRIUS 3RT contactors when equipped with suitable NC auxiliary contacts.
The exact safety function must be established according to the complete machine-control and safety architecture.
The 3RT1076-6CF308K uses screw terminals for the control and auxiliary circuits, while the main circuit uses busbar connections in this contactor configuration. Siemens' SIRIUS documentation identifies screw-terminal and busbar arrangements for the 3RT10 contactor family.
Screw terminals provide a familiar connection method for industrial panel builders and maintenance teams.
The contactor uses an AC coil. Available listings identify the coil/control voltage for this article as 220–240 V AC/DC.
This makes it suitable for compatible industrial control circuits where the specified control voltage is available.
Before installation, the control voltage should always be matched with the exact contactor nameplate and manufacturer documentation.
Available product information identifies the 3RT1076-6CF308K with 2 NO + 2 NC auxiliary contacts.
These auxiliary contacts can be used for:
This provides additional flexibility when integrating the contactor into automated control systems.
The 3RT1076-6CF308K can be incorporated into complete motor-control assemblies alongside:
A typical arrangement can be:
Control System → Contactor Coil → Main Contacts → Motor
The auxiliary contacts can provide feedback to the control system.
The Siemens 3RT1076-6CF308K is suitable for applications such as:
For related Siemens industrial electrical and automation products, customers can explore the Siemens product range at SB Smart.
The 3RT1076-6CF308K is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals working with high-current motors and industrial loads.
Its combination of 3-pole high-current switching, mirror contacts, screw-terminal control/auxiliary connections and AC coil operation makes it suitable for demanding industrial control applications.
The Siemens 3RT1076-6CF308K combines high-current AC-3/AC-3e switching, mirror contacts, auxiliary contacts and an AC/DC-compatible control supply in a robust SIRIUS 3RT contactor.
With a listed 500 A AC-3/AC-3e rating and up to 250 kW at 400 V, it is designed for demanding industrial motor-control applications.
For OEMs, panel builders and automation integrators, it provides a practical solution for high-power motor switching and control-system integration.
SB Smart supplies Siemens industrial electrical and automation products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and major cities across India.
Major delivery locations include:
It is a Siemens SIRIUS 3RT 3-pole power contactor designed for high-current industrial motor-control applications.
Available product information identifies an AC-3/AC-3e rating of 500 A.
The listed motor rating is up to 250 kW at 400 V for the relevant AC-3/AC-3e application.
Yes. The product is specified with mirror-contact functionality.
The control and auxiliary circuits use screw terminals, while the main circuit uses a busbar connection arrangement for this configuration.
Available product listings identify a 220–240 V AC/DC control supply for this article.
The available product listing identifies 2NO + 2NC auxiliary contacts.
It can be used in large motor starters, industrial automation systems, production machinery, conveyors, pumps, compressors and other high-current applications.
Yes. Its auxiliary contacts can be used for feedback, interlocking and control logic within a suitable PLC-based architecture.
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 | 3RT1076-6CF308K |
| Product Type | Power Contactor |
| Number of Poles | 3 Pole |
| AC-3 Rated Current | 500 A |
| Motor Rating | 250 kW at 400/415V |
| Coil Type | AC Coil |
| Coil Voltage | 110–127 V AC |
| Frame Size | S12 |
| Main Contact Configuration | 3 NO |
| Auxiliary Contacts | 2 NO + 2 NC |
| Terminal Type | Screw Terminals |
| Main Circuit Connection | Busbar |
| Mirror Contacts | Yes |
| Control Circuit Connection | Screw Terminal |
| Operating Voltage | Up to 690 V AC |
| Product Family | Siemens SIRIUS Contactors |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
| Condition | New & Genuine Product |
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