What it is on the van shelf
The G7L-2A-TUB DC24 is an OMRON power relay in the G7L series — a 24 VDC-coil, panel-mount unit built to switch heavier loads than a general-purpose relay can handle. On a service call it lives in the cabinet as a compressor, heater, or lighting contactor replacement, not on a control board as a logic-level signal part.
Swap and panel fit
Category placement puts the G7L-2A-TUB DC24 under relays rather than breakers, so it is the switching half of a circuit — confirm the contact form and load rating on the nameplate against the load being replaced before the swap.