3RH19211XA220MA0
The Siemens SIRIUS 3RH1921-1XA22-0MA0 is a front-mounted auxiliary switch module with a 4-pole 2NO+2NC contact configuration (numbers 5 to 8), screw terminal wiring, and is suitable for 3RT1 contactors of sizes S0 to S12, which can expand the number of control signal points.
Product Positioning
3RH1921-1XA22-0MA0 is an auxiliary contact expansion module for the older SIRIUS 3RH19 model. It is a front-mounted 4-pole 2NO+2NC design, suitable for expanding control contacts of 3RT1 series contactors of sizes S0 to S12. The original data for this model did not include the serial number, but it has been restored and confirmed as the true part number according to Siemens MLFB three-segment coding convention.
Core Product Advantages and Features
4-pole 2NO+2NC contact
It provides four contacts at a time (numbered 5 to 8), greatly expanding the available signal points of existing contactors.
Applicable to sizes S0 to S12
It is compatible with various sizes of Siemens 3RT1 series contactors, offering high flexibility in selection.
Front-mounted installation
The assembly method described above is used for fixing, and the installation interface is standardized, making disassembly and maintenance convenient.
Screw terminal wiring
The screw terminal connection simplifies on-site wiring and maintenance.