3RT1066-6AR36

The Siemens SIRIUS 3RT10 series S10 large frame contactor, AC-3 rated 300A, 160kW (400V), with an operating coil of 440-480V AC/DC, is suitable for power distribution systems with higher voltage control power supplies. It comes standard with 2NO+2NC auxiliary contacts and features a robust and durable structure.

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Siemens SIRIUS 3RT1066-6AR36 large power contactor (actual photo)

Product Positioning

The 3RT1066-6AR36 is a Siemens SIRIUS S10 large-frame power contactor with an operating coil voltage of up to 440-480V AC/DC. It is suitable for switchboards and large motor starting circuits in some factories using medium-to-high voltage control power supplies, eliminating the need for an additional step-down transformer. The main circuit AC-3 is rated at 300A and 160kW, with 2NO+2NC auxiliary contacts. Kenxin Motor provides genuine original parts.

Core Product Advantages and Features

440-480V AC/DC operating coil

It can be directly connected to a higher voltage control power supply, eliminating the need for an additional step-down transformer.

S10 large frame, 300A/160kW

The main circuit AC-3 is rated at 300A and 160kW (400V), suitable for controlling large motors.

Standard auxiliary contacts

Built-in 2NO+2NC instantaneous auxiliary contacts facilitate loop interlocking and signal feedback.

Busbar main circuit terminals

The main circuit adopts a connecting bar design, which is suitable for high-current wiring construction.

International Standard Certification

It conforms to the IEC 60947-4-1 low-voltage switchgear specification.

Original factory authorized supplier

Kenxin Motors is an authorized distributor of Siemens, providing genuine products, warranty, and technical support.

project	Specification
series	SIRIUS 3RT10 Large Electric Contactor
Base size	S10
Extreme number	3 poles
Main contact type	3 sets of normally open (NO)
AC-3 Rated Current/Power (400V)	300 A / 160 kW
Auxiliary contact	2NO + 2NC instantaneous contact
Operating coil voltage	440...480V AC/DC
Main circuit wiring method	Connector bus (busbar)
Auxiliary/control circuit terminals	Screw terminals
Applicable Standards	IEC 60947-4-1

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3RT1066-6LA06

The Siemens SIRIUS 3RT10 series S10 large frame contactor body, AC-3 rated 300A, 160kW (400V), has 3 sets of normally open main contacts with 2NO+2NC auxiliary contacts. The operating coil is not included at the factory, but it is suitable for use with a dedicated coil module, allowing for flexible configuration of the control power supply.

3RT1066-6AP36-WH

The Siemens SIRIUS 3RT10 series S10 large frame contactor, AC-3 rated 300A, 160kW (400V), operating coil 220-240V AC/DC, has the same electrical specifications as the standard 6AP36. The meaning of the -WH at the end of the model number is not explained in any public documents. It is recommended to confirm the actual version before purchasing.

3RT1066-6AP36

Siemens SIRIUS 3RT10 series S10 large frame contactor, AC-3 rated 300A, 160kW (400V), operating coil 220-240V AC/DC, standard 2NO+2NC auxiliary contacts, mechanical life of tens of millions of cycles, suitable for direct start control of large motors.