What sits on the DIN rail
The G3DZ-4B 24DC is Omron's solid-state relay in the G3DZ family — a coil-actuated, semiconductor-output switching element that lands beside contactors and breakers in the cabinet rather than replacing them. Class-wise, it belongs to the solid-state relay block used where mechanical relay contacts would wear out from cycling — heater banks, solenoid drivers, and other high-cycle loads that benefit from zero-contact switching.
Lifecycle stage and supply posture
The part is flagged at mature lifecycle stage on the source ledger, meaning Omron has not declared last-time-buy but the device is no longer in new-design promotion — production orders route through the established distribution rather than promotional stock. For a retrofit where the old G3DZ is already wired and proven, mature stage is exactly the right cell to fill — the footprint and pinout match, so it drops into the existing socket without rewiring the rest of the panel.