3RB2066-2MC2

The 3RB2066-2MC2 is a SIRIUS 3RB20 economical solid-state overload relay with an adjustable current range of 160~630A. It is suitable for S10/S12 housings, has a CLASS 20 tripping class, 1NO+1NC auxiliary contacts, and can be used with 3RT1064~3RT1076 series contactors. It features manual/automatic reset.

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Siemens 3RB2066-2MC2 SIRIUS 3RB20 Solid State Overload Relay

Product Positioning

The 3RB2066-2MC2 is an economical solid-state overload relay from Siemens SIRIUS 3RB20, with an adjustable current range of 160~630A. It adopts a CLASS 20 fixed tripping level and can be paired with 3RT1064~3RT1076 series high-current contactors to form a complete motor protection solution.

Core Product Advantages and Features

High current protection range

The current setting range is 160~630A, which is suitable for the overload protection needs of large motors.

CLASS 20 Jump Level

It adopts the CLASS 20 fixed trip feature, which is suitable for motor applications with heavy-duty starting.

Paired with high current contactor

It can be directly installed on SIRIUS contactors of the 3RT1064~3RT1076 series.

Manual/Automatic Reset

It offers manual and automatic reset options, and features switch position indication and self-monitoring functions.

project	Specification
Current adjustment range	160~630 A
Applicable housing	S10/S12
Break away from level	CLASS 20
Auxiliary contact	1NO+1NC
Main circuit connection method	Drain connector (compatible with 3RT1064~3RT1076)

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