3RH1921-1CA10
The Siemens SIRIUS 3RH1921-1CA10 pre-amplifier switch features one set of instantaneous normally open auxiliary contacts, a 10A/690V screw terminal design, and snap-fit mounting on the front of the 3RT1 series contactor, ensuring stable signal feedback.
Product Positioning
The 3RH1921-1CA10 is a front-mounted auxiliary switch module from the Siemens SIRIUS series, providing a standard instantaneous normally open auxiliary contact for feedback of the main contactor's operating status.
Core Product Advantages and Features
Instantaneous action contact
The normally open contact switches synchronously and instantaneously with the main contactor, providing immediate feedback on the operating status.
Front snap-fit installation
It is snap-on mounted on the front of the 3RT1 series contactor, making installation easy.
Screw terminal wiring
The screw terminal design ensures secure and reliable wiring, facilitating on-site maintenance.
Sufficient rated load
Rated current 10A, rated insulation voltage 690V, meeting the requirements of general control circuits.
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3RH1921-1CD01
The Siemens SIRIUS 3RH1921-1CD01 pre-amplifier switch features one set of delayed-opening normally closed auxiliary contacts with screw terminals. It is mounted on the front of the 3RT1 series contactor and is suitable for timing control and interlocking circuit designs.
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3RH1921-1CA01
The Siemens SIRIUS 3RH1921-1CA01 pre-amplified auxiliary switch features one set of instantaneous normally closed auxiliary contacts, screw terminals, a mechanical life of up to 10 million cycles, and snap-fit installation on the front of the 3RT1 series contactor.
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3RH1911-2FA40
The Siemens SIRIUS 3RH1911-2FA40 pre-amplified auxiliary contact module features 4 normally open auxiliary contacts, spring-loaded terminals, and is compatible with S00 size 3RH10/3RT10 series contactors and relays, offering a high number of contacts.