Norcold AC Heating Element 630808 (fits newer N300.3/ N302.3 and all N305.3/ N306.3 models) This is the Norcold DC heating element for all N300.3 and N302.3 models made after June 10th, 2008 and all N305.3 and N306.3 models. Fits: N300.3 (post June 2008) N302.3 (post June 2008) N305.3 N306.3