Switching a 1 A signal — what the ratings mean for the BOM
The SRS1-A1X201 is a SPST-NO (1 Form A) signal relay rated for 1 A continuous load current across 5 to 240 V AC or DC. That 1 A ceiling is the make-and-break limit for resistive loads — inductive loads like a small solenoid or contactor coil will need derating, typically to 0.5 A or less depending on the time constant. The 4-24 VDC input coil means it triggers directly from a 24 V PLC output or a 5 V logic signal without an external dropping resistor, as long as the source can sink the coil's pull-in current.
Socketable plug-in — panel integration and replacement
Socketable mounting with plug-in terminals means the relay body lifts off its base without disturbing the wiring — useful when the relay is in a control cabinet and the BOM calls for periodic replacement or troubleshooting. The termination style is plug-in, so the mating socket (typically an Autonics SRS1-series socket or a generic 8-pin octal-base equivalent) must be ordered separately. The box package indicates individual unit packaging, not reel or tube.