Power distribution block. Range taking for reduced inventories and flexibility. Valox® insulating base. Valox® is a registered trade name of the general electric company. Electro-tin plated. Manufactured from high strength 6061-T6 aluminium alloy. UL recognized rated 90° and is CSA certified. UL assigned short circuit current rating (SCCR) 10000 A. Provides great flexibility in using the connector as an in line splice or to reduce conductor size. PDBU-26-750-1, PDBU-428-500-1, PDBU-49-500-1, PDBU-412 500,PDBU-55-500-1 and PDBU-55-600-1 are UL 486A/B and UL 1953 listed. PDB-55-500-1 and PDB-55-600-1 are UL 486A/B and UL1059 but are not CSA certified. Dual rated for copper and aluminium conductor except for PDBU-55-600-1 and PDB-55-600-1 rated for copper wire only. Rated for 600 V. UL file E84782. UL listed blocks UL file E112158.