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.
Product Positioning
The 3RH1921-1CD01 is a front-mounted auxiliary switch module from the Siemens SIRIUS series. Through a normally closed contact design with delayed disconnection, the control circuit disconnects the signal after the main contact has been activated.
Core Product Advantages and Features
Delayed disconnect design
The normally closed contact opens with a delay after the main contactor operates, making it suitable for sequential control and interlocking circuits.
Front snap-fit installation
It can be directly snapped onto the front of the 3RT1 series contactor, making installation quick and space-saving.
Screw terminal wiring
Screw terminals are used to facilitate wiring installation and future maintenance.
Compatible with multiple chassis
It is suitable for various contactor frame sizes from S0 to S12, offering high flexibility in selection.
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3RH1921-1CD10
The Siemens SIRIUS 3RH1921-1CD10 pre-amplifier switch features one set of early-closing normally open auxiliary contacts and screw terminals. It is mounted on the front of the 3RT1 series contactor and is suitable for timing control circuits such as star-delta start.
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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.
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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.