3RA1924-2B

3RA1924-2B is a side-mounted mechanical interlocking device that prevents short circuits caused by simultaneous operation of both forward and reverse contactors. It covers various specifications including S0, S2, and S3, with each set accompanied by an auxiliary contact. It is suitable for designs of forward and reverse motor starter panels.

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Siemens 3RA1924-2B SIRIUS side-mounted forward and reverse interlocking device physical drawing

Product Positioning

3RA1924-2B is a mechanical interlocking device from the SIRIUS series. It is fixed between forward and reverse contactor groups by side mounting to ensure that the two contactors will not engage at the same time. It covers various specifications such as S0, S2, and S3.

Core Product Advantages and Features

Side mounting design

Installed on the side of the contactor, it does not occupy the front wiring space.

Mechanical interlock protection

Ensure that the two contactors, one for forward and one for reverse, do not operate simultaneously to avoid short circuits.

Multi-specification universal

The same device covers three contactor sizes: S0, S2, and S3.

Includes auxiliary contacts

Each interlocking group is equipped with a normally closed auxiliary contact for circuit monitoring.

project	Specification
model	3RA1924-2B
Product Type	Mechanical interlocking device (for forward and reverse rotation)
Installation method	Side mounting
Applicable contactor specifications	S0, S2, S3
Auxiliary contact	One set of normally closed contacts for each contactor
Applicable series	3RA1 / 3RT1 contactor
Product Status	Production has ceased; the successor model is SIRIUS 3RA2.
country of origin	Türkiye
RoHS	conform to

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