I have a device where I want to use relays to run some important equipment. I want to use monostable relays because if power is lost or if there is any sort of system failure I want the connected device to shut off. This means I'll probably be running the relays continuously or nearly continuously for up to a few hours. I'm concerned about coil heating or otherwise damaging the relay.
I've been looking at some datasheets like these G5Q Datasheet, G5LE Datasheet and I'm having trouble determining how long I can safely keep the relay engaged. I don't see anything indicating a max time or max duty cycle. Does this indicate I can simply leave the relays engaged indefinitely or is there a proper way to go about calculating this?