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.

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Siemens SIRIUS 3RT1066-6LA06 large contactor body (excluding coil) actual photo

Product Positioning

The 3RT1066-6LA06 is the main body model of the Siemens SIRIUS S10 large-frame power contactor. It does not include an operating coil at the factory; a matching operating mechanism module with the corresponding voltage must be selected separately before use. The main circuit is AC-3 rated at 300A and 160kW (400V), suitable for projects with existing standard coils or requiring flexible matching of special control voltages. Kenxin Motors provides selection advice.

Core Product Advantages and Features

Without operating coil

The operating mechanism is not included at the factory; a coil module with the corresponding voltage must be selected separately.

Flexible matching control voltage

AC or DC operating coils can be freely selected according to the on-site control power requirements.

S10 large frame, 300A/160kW

The main circuit AC-3 is rated at 300A and 160kW (400V), and has the same specifications as the contactor body in the same series.

Standard auxiliary contacts

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

Suitable for spare parts and customized configurations

This allows customers to use standardized spare parts or to use them with special voltage coils.

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
AC-3 Rated Current/Power (500V)	300 A / 200 kW
AC-3 Rated Current/Power (690V)	280 A / 250 kW
AC-3 rated current (1000V)	95 A
Auxiliary contact	2NO + 2NC instantaneous contact
Operating mechanism	(Operating coil not included)
External dimensions (height x width x depth)	210 x 145 x 202 mm
Main circuit wiring method	Connector bus (busbar)
Main circuit can be connected to wire cross section	70...240 mm² (stranded wire)

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3RT1066-6NB36

The Siemens SIRIUS 3RT10 series S10 large frame contactor, AC-3 rated 300A, 160kW (400V), adopts the same electronic operating mechanism and has a PLC interface, but the power supply is about 20-33V (approximately 24V) AC/DC, which is a different voltage classification from the 200-277V of the 6NP36.

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.

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.