3RU2136-4DB1

The 3RU2136-4DB1 belongs to the SIRIUS 3RU2 thermal overload relay S2 size series, with a current setting range of 18...25A. It is an independent installation type with 1 NO + 1 NC auxiliary contacts, suitable for stand-alone installation with terminal blocks.

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Siemens SIRIUS 3RU2136-4DB1 Thermal Overload Relay 18-25A (Product Image)

Product Positioning

The 3RU2136-4DB1 is a Siemens SIRIUS 3RU2 series S2 size thermal overload relay with a current adjustment range of 18...25A. It is an independently mounted type and is suitable for overload protection of three-phase motors.

Core Product Advantages and Features

Adjustable current 18...25A

Suitable for three-phase motors with full-load current between 18 and 25 amps, providing precise trip current setting.

Independent installation type

Non-contact direct-mount type, can be fixed to the rail or panel individually, providing greater configuration flexibility.

Class 10 Escape Feature

Compliant with IEC Class 10 overload protection curves, balancing motor starting and safety protection.

1NO+1NC auxiliary contact

Provides trip signal feedback, which can be linked to warning lights or control circuits.

project	Specification
Series Specifications	SIRIUS 3RU2 Second Generation Thermal Overload Relay
Applicable size	S2 (compatible with 3RT20 series contactors)
Break away from level	Class 10
Auxiliary contact	1NO+1NC
Rated operating voltage	690V AC
Protection level	IP20
Operating temperature	-40...+70°C
Current adjustment range	18...25 A
Installation method	Stand-alone installation (presumably based on the naming convention of the 3RU2126-4DB1 series)

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The 3RU2136-4EB0 belongs to the SIRIUS 3RU2 thermal overload relay S2 size series, with a current setting range of 22...32A. It adopts a direct contactor mounting method and has 1 NO + 1 NC auxiliary contacts, making it suitable for medium-sized three-phase motor protection applications.

3RU2136-4DB0

The 3RU2136-4DB0 belongs to the SIRIUS 3RU2 thermal overload relay S2 size series, with a current setting range of 18...25A. It adopts a direct contactor mounting method and has 1 NO + 1 NC auxiliary contacts, making it suitable for small and medium-sized three-phase motor protection applications.

3RU2136-4BB0

The 3RU2136-4BB0 belongs to the SIRIUS 3RU2 thermal overload relay S2 size series, with a current setting range of 14...20A. It adopts a direct contactor mounting method and has 1 NO + 1 NC auxiliary contacts. It is the model with the lowest current adjustable range in this series.