I've been doing a little more checking. Intellitec is a very popular supplier of RV electrical stuff and it's their Disconnect device we've been talking about.
Our coach is a Jayco, and it uses a KiB Disconnect. It's also a Latching Relay but it works differently.
Are you replacing Intellitec with Intellitec? I ask because Intellitec uses much more wiring than KiB does.
Can you post your picture of the Relay you're replacing? Or confirm that the relay you ordered matches the one that failed? I don't want you on an Intellitec Bunny Trail if you have KiB or some other Relay!