3RT1075-6A

The Siemens SIRIUS S12 large contactor series 3RT1075-6A has a main circuit rated current of 400A and an AC-3 rated current of approximately 200kW. It covers various coil voltage versions and features a 3-pole main contact with 2 normally open and 2 normally closed auxiliary contacts. Kenxin Motor can assist in confirming the required coil voltage and procure the corresponding complete part number on your behalf.

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Photo of Siemens SIRIUS 3RT1075-6A series large power contactor

Product Positioning

3RT1075-6A is the series designation for Siemens SIRIUS 3RT10 series S12 frame large power contactors. Actual shipped models may be further subdivided into complete part numbers such as 6AB36, 6AF36, 6AM36, and 6AP36, depending on the coil voltage. All models share the same main circuit specifications and are suitable for direct starting and stopping of large three-phase motors and heavy-load switching in distribution panels, making them a common choice for factory replacement and maintenance.

Core Product Advantages and Features

S12 large frame, 400A load capacity

The main circuit AC-1 reaches 430A, and AC-3 is approximately 400A/200kW, suitable for direct starting applications of large motors.

Multiple coil voltage options

Covers coil codes for 23-26V, 110-127V, 200-220V, and 220-240V, specified upon request.

Built-in 2NO2NC auxiliary contacts

In addition to the 3-pole main contacts, two normally open and two normally closed auxiliary contacts are configured to facilitate interlocking and signal feedback.

Bus main circuit terminals

The main circuit uses bus (BAR) terminals, while the auxiliary/control circuit uses screw terminals.

Please confirm the coil code before placing an order.

This number is a series abbreviation; for formal quotations and shipments, the complete part number and coil voltage must still be specified.

Siemens Original Authorization

Kenxin Motors can assist in verifying the required coil voltage on-site to ensure the part number is correct.

project	Specification
Base size	S12
Rated operating current AC-1	430 A (400V, 40°C)
Rated operating current/power AC-3	400 A / approximately 200 kW (400V AC)
Extreme number	3 poles, 3 sets of normally open main contacts
Built-in auxiliary contacts	2 normally open + 2 normally closed (2 NO + 2 NC)
Selectable coil voltage	23-26V, 110-127V, 200-220V, 220-240V, 440-480V, etc.
Rated insulation voltage	1000 V AC
External dimensions (height x width x depth)	Approximately 214 x 160 x 225 mm
Main circuit terminals	Busbar (BAR) terminals
Applicable Standards	IEC 60947-4-1
Remark	This product number does not specify the coil voltage; it is a general term used by the distributor for the series. Please provide the actual coil voltage when placing a formal order.

Recommend

3RT1075-6AB36

The Siemens SIRIUS S12 large contactor 3RT1075-6AB36 has a rated current of 400A, AC-3 power of approximately 200kW, and a coil voltage of 23-26V AC/DC low voltage universal. It features 3-pole main contacts with built-in 2NO2NC auxiliary contacts, making it suitable for safe ultra-low voltage control applications. Kenxin Motor has authorized sources and provides technical consultation.

3RT1075-2AP36

The Siemens SIRIUS S12 large contactor 3RT1075-2AP36 has a rated current of 400A, AC-3 approximately 200kW, and a coil voltage of 220-240V AC/DC universal. It features 3-pole main contacts with 2 normally open and 2 normally closed auxiliary contacts. Its specifications are consistent with the 6AP36 version in the same series. Kenxin Motor provides authorized sources and selection consultation.

3RT1075-0LA06

The Siemens SIRIUS S12 large contactor 3RT1075-0LA06 has a main circuit rated current of 400A and an AC-3 rated current of approximately 200kW. The LA06 is a contactor body without a coil operating mechanism, suitable for additional coils or special assembly requirements. Kenxin Motors recommends confirming the actual coil configuration and delivery details before placing an order.