This article introduces the working principle of PCB relays, dividing their internal structure into magnetic system, mechanical motion system and contact system. It elaborates the relay’s status changes in de-energized and energized conditions: coil current creates magnetic attraction to drive the armature, which actuates contacts to switch circuits; the return spring resets components to a safe de-energized state. It also mentions factors affecting practical performance including relay types and protection structures.
READ MORETo ensure reliable automation, engineers must select the correct relay contact metallurgy. Matching silver alloys or gold to specific load profiles prevents system failures.
READ MOREChoose the right heavy-duty relays for industrial automation. Evaluate load types, inrush currents, and contact materials to ensure system safety and prevent machinery failures.
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