3RU2146-4KB1

Siemens 3RU2146-4KB1 SIRIUS S3 Thermal Overload Relay 57...75 A
Siemens 3RU2146-4KB1 SIRIUS S3 Thermal Overload Relay 57...75 A

Siemens SIRIUS 3RU2146-4KB1 thermal overload relay, adjustable current 57...75 A, S3 size, independent mounting type, can be fixed to a rail or panel, with Class 10 operating characteristics and 1NO+1NC auxiliary contacts.

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Siemens 3RU2146-4KB1 SIRIUS S3 Thermal Overload Relay 57...75 A
Product Positioning

The 3RU2146-4KB1 is a Siemens SIRIUS S3 size thermal overload relay with a current adjustment range of 57...75 A. It adopts Class 10 operating characteristics and is an independent mounting type. It is not directly assembled onto the contactor but can be independently fixed to a DIN rail or panel and then connected to the contactor by wiring, providing greater flexibility in configuration.

Core Product Advantages and Features
The adjustable current range is clearly defined.
The operating current value can be adjusted within the range of 57...75 A according to the motor's rated current, providing precise overload protection.
Class 10 Action Level
It meets Class 10 tripping characteristics and can quickly act to protect the motor and circuit under overcurrent conditions.
Manual/Automatic Reset Switch
The panel has a manual and automatic reset switching function, which can be flexibly set according to on-site maintenance needs.
Independent installation design
This model is designed for independent installation and is not directly assembled with the contactor. It can be fixed separately to the guide rail or panel before wiring.
1NO+1NC auxiliary contact
It has a built-in 1 normally open + 1 normally closed auxiliary contact, which can be used as a trip signal report or interlock control.
project Specification
Product Series SIRIUS 3RU2146 Thermal Overload Relay
Size Specifications S3
Current adjustment range 57...75 A
Action Level Class 10
Auxiliary contact 1 normally open + 1 normally closed (1 NO + 1 NC)
Reset method Manual/Automatic switchable
Installation method Independent installation
Maximum rated operating voltage 690 V
Applicable contactors SIRIUS 3RT204 series (S3 size, such as 3RT2045/2046/2047)

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