3RU2126-4BB1

The Siemens SIRIUS 3RU2126-4BB1 thermal overload relay has a current setting range of 14~20A. Both the main and auxiliary circuits use screw terminals, allowing for independent installation. It is suitable for S0 size contactors, has a Class 10 tripping rating, and protects motor circuits.

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Siemens SIRIUS 3RU2126-4BB1 Thermal Overload Relay 14-20A Independent Mount Model

Product Positioning

The 3RU2126-4BB1 is a Siemens SIRIUS series S0 size thermal overload relay with a current adjustment range of 14 to 20 amps. Both the main circuit and auxiliary circuit use screw terminals and are designed for independent installation, which facilitates flexible layout of the distribution panel.

Core Product Advantages and Features

Current adjustment range 14-20A

The trip setting value can be precisely adjusted according to the motor's rated current to provide appropriate overload protection.

Screw terminal design

Both the main circuit and the auxiliary circuit use screw terminals, which makes wiring and construction convenient and ensures stable and reliable contact.

Independent and separate installation

It does not need to be directly mounted on the contactor body; it can be flexibly installed in an independent position according to the control panel configuration.

Class 10 Breakthrough Level

It meets the standard motor overload protection tripping characteristics, reducing the risk of motor damage due to overheating.

project	Specification
Product Series	SIEMENS SIRIUS 3RU2
Current adjustment range	14-20 A
Terminal type	Screw terminals (main circuit/auxiliary circuit)
Installation method	Independent and separate installation
Applicable size	S0
Auxiliary contact	1 NO + 1 NC
Break away from level	CLASS 10
Regression method	Manual/Automatic Reset

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