Mersen MPDBC6263 Safety Cover Brand: Mersen. Part Number: MPDBC6263. Mersen Safety Cover, Hinged, For Use With: MPDB Miniature Series Open Style Power Distribution Block, Specifications: 600 VAC, Snap-On Mount, Polycarbonate. Additional Description: MERS-MPDBC6263 SAFETY COVER FOR MINI MPDB Cover. Catalog Description: Open-Style PDB UL 1953 1000V Mini Cover..