3RU2126-4DB0

The Siemens SIRIUS 3RU2126-4DB0 thermal overload relay features an S0 frame, a current adjustment range of 20 to 25 amps, and screw terminals for direct mounting to the contactor. It is suitable for three-phase motor protection of approximately 11 kW at 400V and approximately 22 kW at 690V.

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Siemens SIRIUS 3RU2126-4DB0 Thermal Overload Relay 20-25A

Product Positioning

The Siemens SIRIUS 3RU2126-4DB0 has a current adjustment range of 20 to 25 amps, screw terminals, and direct mounting to S0 frame contactors, providing overload protection for approximately 11 kW three-phase motors at 400V.

Core Product Advantages and Features

Contactor directly mounted on the front

Together with the corresponding S0 frame contactor, it forms an integrated motor starter, simplifying the assembly process.

20-25A Precision Adjustment

The knob setting allows for fine-tuning between 20 and 25 amps to match the actual motor's rated current.

Multi-voltage power correspondence

Different motor power levels are selected according to different voltage levels of 400V, 500V, and 690V.

1NO+1NC auxiliary contact

It provides a trip status signal and can be connected in series with control loops and warning indicators.

project	Specification
Current adjustment range	20...25 A
Frame size	S0
Break away from level	Class 10
Motor power (400V/500V/690V)	11/15/22 kW
Terminal type	Screw terminals/contactors directly mounted

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3RU2126-4CC0

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3RU2126-4CB1

The Siemens SIRIUS 3RU2126-4CB1 thermal overload relay has a current setting range of 17~22A. 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 provides stable and reliable motor overload protection.