3RT1066-6AB36

The Siemens SIRIUS 3RT1066-6AB36 is a large S10 frame power contactor with a rated current of 300A (AC-3) and the ability to switch 160kW loads at 400V. It features a 23-26V AC/DC wide-range coil and 2NO+2NC auxiliary contacts. The main circuit uses bus terminals, making it suitable for integrated applications with large motors and switchboards.

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Siemens 3RT1066-6AB36 SIRIUS S10 large power contactor 300A 24V coil

Product Positioning

The Siemens SIRIUS 3RT1066 series is a representative model of large power contactors with an S10 frame, designed specifically for heavy-duty motor starting and stopping and power switching. The 3RT1066-6AB36 features a 23-26V AC/DC wide-range coil, with a rated current of 300A for AC-3 and the ability to switch 160kW loads at 400V. It is also equipped with 2NO+2NC auxiliary contacts to meet interlocking control requirements. The main circuit adopts a bus terminal design, conforming to IEC 60947-4-1 standards, making it suitable for integration into large switchboards and motor control centers.

Core Product Advantages and Features

S10 large frame

The AC-3 model has a rated current of 300A and can switch to a 160kW large load at 400V, making it suitable for heavy-duty motor starting and stopping applications.

23-26V AC/DC wide-range coil

Low-voltage, wide-range coil compatible AC/DC control power supply with highly flexible switchboard design.

2NO+2NC auxiliary contacts

Four sets of auxiliary contacts can meet the needs of control loops such as interlocking, monitoring, and signal feedback.

Busbar main circuit terminals

With 70-240mm² conductor capacity, suitable for high-current wiring installation.

Mechanical life of 10 million cycles

Long lifespan design reduces replacement frequency, improves production line uptime and maintenance efficiency.

Compliant with IEC 60947-4-1

Verified by international standards, it can be safely integrated into various industrial power distribution systems.

project	Specification
brand	Siemens
series	SIRIUS 3RT10
model	3RT1066-6AB36
Frame size	S10
Extreme number	3P
AC-3 Rated Current/Power (400V)	300A / 160kW
AC-1 rated current	330A
auxiliary contacts	2NO+2NC
Coil Specifications	23-26V AC/DC
Coil power consumption	AC 6.7/590VA, DC 7.4/650W
Main circuit terminals	bus
External dimensions (height x width x depth)	210 x 145 x 202 mm
Protection level	IP00/IP20
Mechanical life	10 million times
Applicable Standards	IEC 60947-4-1

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3RT1066-6AF36

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3RT1066-2AP36

The Siemens 3RT1066-2AP36 is a large S10 frame power contactor with a rated current of 300A (AC-3) and a power of 160kW at 400V. It is equipped with a 220-240V AC/DC coil and 2NO+2NC auxiliary contacts. The actual measured weight of the whole unit is about 6.52 kg. It is suitable for motor control centers and large power distribution systems.

3RT1066-1AP36

The Siemens 3RT1066-1AP36 belongs to the SIRIUS S10 frame large contactor series. The main body is the same as the 300A/160kW model in the same series. It is equipped with a 220-240V AC/DC coil and 2NO+2NC auxiliary contacts, and is suitable for large motor control and power switching applications.