P4KE540A-E3/54TVS 400W 540V 5% UNIDIR AXIAL|VISHAY SEMICONDUCTOR DIODES DIVISION|Lead free|RoHS Compliant P4KE540A P4KE540A-E3/73TVS 400W 540V 5% UNIDIR AXIAL|VISHAY SEMICONDUCTOR DIODES DIVISION|Lead free|RoHS Compliant P4KE540A