The 1.5KE75CA-B: Through-hole mounting means the leads pass through the PCB and are soldered on the opposite side — the axial body sits above the board, so the hole spacing and lead bend radius must match the footprint to avoid stressing the glass passivation. The reverse standoff voltage is 64.1 V, with breakdown guaranteed between 71.3 V and the clamp point — this defines the protection threshold for a 48 V to 60 V DC rail.
Diodes Incorporated lists the 1.5KE75CA-B as Obsolete. Sourcing runs through independent surplus and broker channels — quantities are lot-specific, and availability with date-code spread is confirmed at RFQ time.
The wide range means the same part works across a cold-start diesel generator enclosure and a hot-side power supply.