What the 240 V AC rating means for fit
The 7SJ6005-4EA00-0DA0/BB: The 240 V AC rating defines the maximum continuous voltage the relay's sensing and control circuits are designed to operate across. For a protection relay, this voltage class typically governs the auxiliary supply and the voltage input to the measuring circuit. If your panel's control voltage is 240 V AC line-to-neutral or line-to-line on a 240/120 V system, this relay matches directly. If your system uses a different control voltage (e.g., 120 V AC or 24 V DC), you would need a different variant in the 7SJ600 family.