What the 24 VAC coil and U-bracket bracket mean on a G7L
The G7L-1A-TUB-CB-AC24 is Omron's QC U-bracket variant in the G7L solid-state relay line, and the trailing -AC24 locks the coil to a 24 VAC control input — so on a 24 VAC control transformer the coil lands on the panel without an interposing relay, while a 24 VDC control scheme will not pick this part (cites:,). The 'CB' position in the suffix marks the quick-connect U-bracket termination used for panel-mount service in heating, motor-heater, and lighting-switching cabinets where the relay studs directly to a busbar or pad (cites:,).
How this relay class is used on a panel
Solid-state overload relays in this Omron category sit downstream of a contactor or breaker and upstream of a resistive or motor-heater load, switching the AC load with no moving contacts — the panel-side job is zero-cross switching for heater banks, dryers, and packaging-line sealing jaws where mechanical relay contact wear is the failure mode (cites:,).