3RH1921-1KA11
The 3RH1921-1KA11 is an auxiliary switch assembly mounted on the second side of the SIRIUS 3RT1 contactor. It has one normally open contact and one normally closed contact, screw terminal wiring, conforms to EN50005 standard, and is suitable for contactors of sizes S3 to S12, facilitating the expansion of control signals.
Product Positioning
The 3RH1921-1KA11 is the second set of side-mounted auxiliary switches for Siemens SIRIUS 3RT1 series 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 attached to the side of the 3RT1 body in a snap-on manner, without affecting the main contact configuration.
Screw terminal wiring
Standard 10mm screw terminals make wiring and installation simple.
Wide range of applications
It can be used with various 3RT1 series contactors such as 3RT10 and 3RT12.
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3RH1921-1KA20
The 3RH1921-1KA20 is a dedicated second-side auxiliary switch assembly for the SIRIUS 3RT1 contactor. It features 2 NO contacts, screw terminal wiring, conforms to EN50005 standard, is suitable for S3~S12 size contactors, has a mechanical operation life of up to 10 million cycles, and is stable and durable.
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3RH1921-1JA11
The 3RH1921-1JA11 is an auxiliary switch assembly mounted on the second side of the SIRIUS 3RT1 contactor. It has one normally open contact and one normally closed contact, screw terminal wiring, conforms to EN50012 standard, is suitable for contactors of sizes S3 to S12, and is reliable and durable.
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3RH1921-1HA22
3RH1921-1HA22 is a SIRIUS 3RT1 contactor with a front-mounted 4-pole auxiliary switch assembly, consisting of 2 normally open and 2 normally closed contacts, screw terminal wiring, conforming to EN50012 standard, and suitable for S0~S3 size contactors. The original manufacturer's note indicates that it is no longer in production.