3RF2255-1AB45

The SIRIUS 3RF2255-1AB45 is a Siemens 55A three-phase solid-state contactor with two-phase control, 48-600VAC output, 4-30VDC control voltage and zero-voltage switching technology, and a blocking voltage of up to 1200V, making it suitable for high-frequency switching industrial automation applications.

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Siemens SIRIUS 3RF2255-1AB45 55A Three-Phase Solid State Contactor

Product Positioning

The SIRIUS 3RF2255-1AB45 is a 55A three-phase solid-state contactor in the Siemens 3RF2 series. It drives three-phase outputs with two-phase control and is suitable for motor and heating applications that require contactless, long-life switching.

Core Product Advantages and Features

Zero-voltage switching technology

It conducts when the voltage crosses zero, reducing surge current and electromagnetic interference, and extending the service life of the load.

55A Three-Phase Output Design

With a rated current of 55A and an output voltage of 48-600VAC, it can cover a variety of industrial three-phase load specifications.

4-30VDC wide range control voltage

The control signals are compatible with the output potentials of various PLCs and controllers, allowing for more flexible wiring configurations.

Contactless solid structure

Replacing mechanical contacts with semiconductor components results in noiseless and arc-free switching with low maintenance requirements.

project	Specification
Rated current	55 A
Number of phases/control method	3-phase output, 2-phase control
Output voltage	48-600 V AC
Control voltage	4-30 V DC
Switching methods	Zero voltage switching
Blocking voltage	1200 V
External dimensions	95 x 45 x 47.5 mm
Connection method	Screw terminals

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