3RB2153-4FC2

The 3RB2153-4FC2 is a solid-state overload relay from the SIRIUS 3RB21 standard series. It has an adjustable current range of 50~200A, is suitable for S6 housings, features a main circuit with a drain bus connection and auxiliary circuit screw terminals, built-in ground fault detection, and supports manual/automatic reset.

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Siemens 3RB2153-4FC2 SIRIUS 3RB21 Solid State Overload Relay

Product Positioning

The 3RB2153-4FC2 is a Siemens SIRIUS 3RB21 standard series solid-state overload relay with an adjustable current range of 50~200A. It is suitable for S6 housings, uses a bus connection for the main circuit, and has a built-in ground fault detection function. It is suitable for motor protection applications with standard installation requirements.

Core Product Advantages and Features

Drain main circuit connection

The main circuit uses a busbar connection method, and the auxiliary circuit uses screw terminals, making installation and wiring convenient.

Built-in ground fault detection

It has an internal grounding fault detection function, which enhances the abnormal protection capability of the motor circuit.

Escape level adjustable from 5 to 30E

The tripping level can be flexibly adjusted according to the motor's starting characteristics to adapt to light to heavy load starting.

Manual/Automatic Reset

It supports both manual and automatic reset modes, which can be flexibly switched according to production line needs.

project	Specification
Current adjustment range	50~200 A
Applicable housing	S6
Break away from level	CLASS 5~30E (Adjustable)
Main circuit connection method	Drain connection
Ground fault detection	built-in

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