3RT1055-6LA06

The 3RT1055-6LA06 is a large contactor body from the Siemens SIRIUS 3RT10 series S6 frame. It has an AC-3 current of 150A and a power of 75kW/400V. The operating coil is not included in the shipment, but the coil module can be matched according to the field control voltage. It is suitable for both unified spare parts planning and individual coil replacement needs.

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Product Positioning

The 3RT1055-6LA06 is a Siemens SIRIUS 3RT10 series S6 frame large contactor body, suitable for 75kW three-phase motor control circuits. This model does not include an operating coil at the factory; however, the corresponding coil module can be freely selected according to the actual control voltage. This is particularly suitable for situations where parts are stocked uniformly in the factory or where individual coil replacements are needed due to damage. Kenxin Motors provides original factory parts and selection suggestions.

Core Product Advantages and Features

S6 Large Frame Design

AC-3 rated at 150A, 75kW/400V, is suitable for direct start control of the main circuit of large three-phase motors.

The main body does not include coils.

The product does not include an operating coil. You can choose to match the coil module according to the voltage on site, which makes the material preparation more flexible.

The coil can be replaced individually.

When the coil is damaged, there is no need to replace the entire contactor body, reducing maintenance costs and downtime.

2NO+2NC auxiliary contacts

It has 4 built-in auxiliary contacts to meet control needs such as interlocking, feedback and indication.

High durability mechanical life

The mechanical life reaches 10 million operating cycles, ensuring stable and reliable long-term use.

Original manufacturer authorized distributor warranty

Kenxin Motors provides genuine Siemens products, with warranty and technical consultation services.

project	Specification
brand	Siemens
series	SIRIUS 3RT10
model	3RT1055-6LA06
Frame size	S6
Extreme number	3P (3 normally open main contacts)
AC-3 Rated Current/Power	150 A / 75 kW, 400V AC
auxiliary contacts	2 NO + 2 NC
Coil configuration	Operating coil not included (for main unit type, coil module required separately).
External dimensions (height × width × depth)	172 × 120 × 170 mm
net weight	Approximately 2.84 kg (excluding coil)
Main circuit wiring method	Busbar (copper busbar) terminals, compatible with 25-120 mm² wires.
Auxiliary/control circuit wiring	Screw terminals, compatible with 0.5-4 mm² wires.
Mechanical life	10 million times
Power consumption per pole	Approximately 9 W (total power consumption approximately 27 W)

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