EOL — last-time-buy window closed
The 1.5KE10ARL4G is officially obsolete per Littelfuse's product status — the last-time-buy window has passed, and the manufacturer no longer accepts new orders for this specific order code. For an existing BOM line that calls out this exact part, the supply path runs through independent surplus channels.
Clamping performance and selection
The 103 A peak pulse current at the clamping voltage of 14.5 V defines the surge the diode can shunt without failing. The 8.55 V reverse standoff voltage means the diode stays in high-impedance mode on a nominal 8.5 V rail, clamping only when the line exceeds 9.5 V breakdown. A 14.5 V clamp ceiling protects downstream silicon rated for 16 V or higher.
Package and deployment context
DO-201AD axial-lead package — the through-hole body handles the 1.5 kW pulse without the thermal limitations of a smaller SMD footprint.