3RT1055-6AF36

The 3RT1055-6AF36 is a Siemens SIRIUS 3RT10 series S6 large three-pole contactor with an AC-3 rated current of 150A and a rated power of 75kW (400V). It is equipped with 2NO+2NC auxiliary contacts and a 110-127V AC/DC coil, and screw terminal wiring. It is widely used in motor control and industrial power distribution systems.

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Front view of Siemens 3RT1055-6AF36 SIRIUS S6 contactor

Product Positioning

The 3RT1055-6AF36 is a representative S6 large contactor from the Siemens SIRIUS 3RT10 series. Its three-pole main contacts can withstand heavy load switching of AC-3 rated 150A, 75kW, and it has two sets of normally open and two sets of normally closed auxiliary contacts for easy integration with control circuits. Its 110-127V AC/DC coil design is widely applicable to industrial motor control and power distribution systems.

Core Product Advantages and Features

150A/75kW high current switching

The AC-3 has a rated current of 150A and a power of 75kW (400V), which is sufficient to drive large three-phase motors and heavy machinery.

2NO+2NC auxiliary contacts

It has 4 built-in auxiliary contacts, which can be directly used for interlock control, indicator circuits or PLC signal feedback.

110-127V AC/DC coil

The coil can operate stably under 110-127V AC or DC, making it suitable for various control power supply systems.

Screw terminal design

Both the main circuit and the auxiliary circuit use screw terminals, which makes wiring quick and easy to maintain in the future.

Long mechanical life

The mechanism can withstand tens of millions of operation cycles, making it suitable for automated production lines with high-frequency start-stop cycles.

Fully Certified International

It has passed multiple safety certifications such as UL and CE, and can be used in export machines and power distribution systems of multinational factories.

project	Specification
brand	Siemens
series	SIRIUS 3RT10
model	3RT1055-6AF36
Case size	S6
Extreme number	3-pole (3P)
AC-3 rated current	150 A (400V)
AC-3 rated power	75 kW (400V)
auxiliary contacts	2NO+2NC
Coil/Control Voltage	110...127 V AC/DC
Main circuit/control circuit terminals	Screw terminals
External dimensions (height × width × depth)	Approximately 172×120×170 mm
Mechanical life	Approximately 10 million times
Ambient temperature	-25℃ to +60℃
Certification	UL, CE, CSA, CCC, etc.

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