3RT1075-0A

The Siemens SIRIUS S12 large contactor series 3RT1075-0A has a main circuit rated current of 400A and an AC-3 rated current of approximately 200kW. It features a 3-pole main contact with 2 normally open and 2 normally closed auxiliary contacts. Actual shipments are subject to part number subdivision based on coil voltage. Kenxin Motor can assist in confirming the required specifications and procure the corresponding complete part number on your behalf.

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Siemens SIRIUS 3RT1075-0A series large power contactor actual photo

Product Positioning

3RT1075-0A is the series designation for Siemens SIRIUS 3RT10 series S12 frame large power contactors. Its main circuit specifications are consistent with the 2A and 6A versions in the same series. Actual shipments will be further subdivided into complete part numbers based on coil voltage. It is suitable for direct starting and stopping of large three-phase motors and heavy-load switching in distribution panels, and is a common starting point for price inquiries in factories for 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, with the same load-bearing capacity as other circuits in the same series.

Covering a variety of coil voltages

The actual part number is specified according to the requirements, with different coil codes ranging from 23-26V to 220-240V.

Built-in 2NO2NC auxiliary contacts

The main contacts are equipped with two normally open and two normally closed auxiliary contacts 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.

The prefix 0 needs clarification from the manufacturer.

Publicly available information commonly uses the prefix 2 or 6; versions with the prefix 0 have not yet been independently verified.

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)
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 part number does not specify the coil voltage and is a general series designation. The independent part number prefixed with 0 is not found in any publicly available catalog. For formal orders, please provide your specific requirements.

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3RT1075-0AP36

The Siemens SIRIUS S12 large contactor 3RT1075-0AP36 has a main circuit rated current of 400A, approximately 200kW AC-3, and a coil voltage of 220-240V AC/DC universal. It features a 3-pole main contact with 2 normally open and 2 normally closed auxiliary contacts, suitable for large motor start-stop circuits. Kenxin Motor is an authorized agent and can assist in verifying the specifications of the delivered goods.

3RT1070-6AP36

The Siemens SIRIUS 3RT10 series S12 large-frame power contactor shares the same frame design as the 3RT1075/3RT1076 in the same series. It comes standard with 2NO+2NC auxiliary contacts and screw terminals for main circuit wiring with busbars. It can be installed in various heavy-duty control panels and large motor starting circuits. It has a mechanical life of tens of millions of cycles and is stable and durable.

3RT1070-6AP30

The Siemens SIRIUS 3RT10 series S12 large-frame power contactor has a coil voltage rating of 220-240V AC/DC. It belongs to the same voltage category as the 6AP36 contactor and inherits the S12 frame design. It comes standard with 2NO+2NC auxiliary contacts and is suitable for use with large motor control panels and high-power power distribution systems. It is of stable original quality.