3RH1921-1EA11

The 3RH1921-1EA11 is a SIRIUS 3RT1 contactor with an auxiliary switch assembly on the first side. It has one normally open and one normally closed contact assembly, screw terminal wiring, conforms to EN50005 standard, and is suitable for contactors of sizes S0 to S12, with a wide range of applications.

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Siemens SIRIUS 3RH1921-1EA11 Side-mounted 1NO1NC Auxiliary Switch Assembly

Product Positioning

The 3RH1921-1EA11 is the first side-mounted auxiliary switch in the Siemens SIRIUS 3RT1 series of contactors, providing one set of normally open and one set of normally closed contacts, suitable for control circuits that require signal conversion.

Core Product Advantages and Features

1NO+1NC switching contact

It provides both normally open and normally closed signals, which can be used in interlocking or status monitoring circuits.

Side-mounted quick-release installation

It is snap-on mounted on the side of the 3RT1 body for quick installation.

Screw terminal wiring

Standard 10mm screw terminals make wiring and installation simple.

Wide range of applications

Covering sizes from S0 to S12, it can be used with a variety of 3RT1 series contactors.

project	Specification
Contact configuration	1 NO + 1 NC
Installation method	Side-mounted (first group), screw terminal
Applicable size	S0...S12 (3RT1 series contactors)
Applicable Standards	EN 50005

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3RH1921-1EA02

The 3RH1921-1EA02 is a SIRIUS 3RT1 contactor with an auxiliary switch assembly on the first side. It has two normally closed contacts, screw terminal wiring, conforms to EN50005 standard, and is suitable for contactors of sizes S0 to S12. It is suitable for power failure interlocking signal applications.

3RH1921-1DA11

The 3RH1921-1DA11 is an auxiliary switch group mounted on the first side of the SIRIUS 3RT1 contactor. It has one normally open and one normally closed contact group, screw terminal wiring, conforms to EN50012 standard, is suitable for contactors of sizes S0 to S12, and has a mechanical life of 10 million cycles.