These connectors should not be mated or unmated under electrical load. Connectors of the same or different types arranged in a line should be polarised to prevent the possibility of wrong connection. UL, CSA, SEV. Han E® AV Terminal Blocks. From Han E, these AV terminal blocks are used in conjunction with the bulkhead/panel mount housing to allow a terminal block style wire termination inside the equipment, perfect for customizable connection solutions. Features and Benefits: Inserts available with 6 to 24 poles plus pre-mating earth Screw terminal wire acceptance 0.2 to 2.5mm² Mechanical life of 500 mating cycles Compatible with the Han E ES AV and Han E AV range of Hoods and Housings