This post explains for Contactor.
The Part Number is CJX2-1210.
The function of this semiconductor is AC contactor.
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CJX2-1210 is AC Contactor. An AC contactor, also known simply as a contactor, is an electrical switch used to control an electrical circuit. It is specifically designed to handle alternating current (AC) loads. Contactors are commonly used in various applications where remote control of power circuits is necessary, such as in industrial machinery, HVAC systems, lighting control, motor control, and more.
CJX2 AC Contactor( including LC1-D contactor and LC1-F Contactor),it is suitable for using in the circuit up to the rated voltage 1000V AC 50/60 Hz,and three phase,rated voltage 380V,rated current up to 630A.to switch on and off the circuit at a distance.
It is also used as unfrequent start,stop and reversal of AC motor,it is combined into the electromagnetic starter with the thermal relay,combined with the auxiliary contact block,air delayer&machine-interlocking devices,it becomes the delay contactor,mechanical interlocking contactor,star-delta starter,the contactor is produced according to the standard IEC60947-4-1,GB14048.4.
It’s important to note that contactors are different from relays. While both contactors and relays are electromechanical switches, contactors are specifically designed for handling higher current loads associated with industrial applications, while relays are often used for lower-power applications in control circuits.