3RB3123-4QB0

The Siemens SIRIUS 3RB3123-4QB0 electronic overload relay has a current setting range of 6 to 25A, is S0 specification, uses screw terminal wiring, has built-in ground fault detection, and a rated insulation voltage of 690V. It is suitable for three-phase motor protection.

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Siemens 3RB3123-4QB0 SIRIUS Electronic Overload Relay Screw Terminal Product Image

Product Positioning

The 3RB3123-4QB0 is a screw-terminal version of the Siemens SIRIUS 3RB3 series electronic overload relays with current ratings from 6 to 25A, suitable for overload and ground fault protection of medium-sized three-phase motors.

Core Product Advantages and Features

Screw terminal wiring design

Both the main circuit and the auxiliary circuit use screw terminals, making wiring construction and subsequent maintenance relatively familiar and convenient.

6 to 25A current setting range

It covers the rated current range of medium-sized three-phase motors and can precisely adjust the trip value according to the actual load.

Built-in ground fault detection

Electronic circuits monitor abnormal grounding currents in real time, enhancing the overall protection capabilities of the power distribution system.

690V rated insulation voltage

It has high insulation resistance and is suitable for installation in general industrial power distribution environments.

project	Specification
Current setting range	6～25 A
Size Specifications	S0
Break away from level	Class 5E, 10E, 20E, 30E adjustable
Terminal type	Screw terminals (main circuit/auxiliary circuit)
Rated insulation voltage	690 V
Auxiliary contact	1NC + 1NO

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