3RT1075-6AF36

The Siemens SIRIUS S12 large contactor 3RT1075-6AF36 has a rated current of 400A, AC-3 approximately 200kW, and a coil voltage of 110-127V AC/DC universal. It features 3-pole main contacts with built-in 2NO2NC auxiliary contacts and main circuit bus terminals. This is a common and mainstream specification in this series, and Kenxin Motor has authorized sources for it.

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Siemens SIRIUS 3RT1075-6AF36 large power contactor (actual photo)

Product Positioning

The 3RT1075-6AF36 is one of the most comprehensively documented large power contactors in the Siemens SIRIUS 3RT10 series S12 frame, suitable for direct starting and stopping of large three-phase motors and switching of heavy-duty switchboards. With a coil voltage of 110-127V AC/DC, it meets the common control voltage requirements of many countries. Its robust and durable construction makes it a popular choice for replacement in factories and mechanical equipment.

Core Product Advantages and Features

S12 large frame, 400A load capacity

AC-1 has a rated current of 430A, and AC-3 has approximately 400A/200kW, suitable for direct starting applications of large motors.

110-127V coil voltage

AF coil codes correspond to 110-127V AC/DC, conforming to common control voltage standards in many countries.

Built-in 2NO2NC auxiliary contacts

It comes standard with 2 normally open and 2 normally closed auxiliary contacts for easy interlocking, indication, or PLC signal feedback.

Bus main circuit terminals

The main circuit uses busbar terminals, while the auxiliary/control circuits use screw terminals, facilitating wiring.

Complete original factory documents

This series of specifications has the most complete verification data and a high degree of consistency, making it suitable as a replacement reference standard.

Siemens Original Authorization

Kenxin Motors guarantees genuine products and assists in verifying coil voltage and nameplate information upon arrival.

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)
Coil voltage code	AF: 110-127V AC/DC
Rated insulation voltage	1000 V AC
External dimensions (height x width x depth)	214 x 160 x 225 mm
Main circuit terminals	Busbar (BAR) terminals
Auxiliary/control terminals	Screw terminals
Applicable Standards	IEC 60947-4-1
Mechanical life	Approximately 10 million operations

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