Hot Water Heater Down

[Travelling Three]

We full time in our 2017 Montana 3661RL and last night the 50 amp breaker on the camper distribution panel tripped. First time this has ever happened in any camper weve had, kind of scary esp late at night. Last night after the breaker tripped I couldn't tell what could have tripped it. Today we discovered the hot water heater is broke and this is probably what tripped the breaker. I've got lots of reading to do on this forum and a Heartland provided water heater troubleshooting manual I down loaded. I'm also going to call Suburban tomorrow. During the installation of the hot water heater the sticky label got destroyed so I cant determine the part number of the heater. The Installation and Operations manual are for a SW4DEL, SW6DEL, SW10DEL, SW12DEL and a SW16DEL water heater. Tonight I'm going to assume the number in the part number is the gallon size of the heater. My question is, is there any serviceable parts for this heater? Any suggestions as to what went bad causing the 50 amp breaker to trip? Thanks for any information!