What the ratings mean for a protection design
The 1.5KE33CA_R2_00001: The 28.2V reverse standoff voltage means it stays out of conduction below that rail — a 24V nominal bus with 10% tolerance sits safely under the standoff. Clamping starts at 31.4V minimum breakdown and holds the transient to 45.7V maximum at the 33A peak pulse current, which is the voltage the downstream silicon sees.
Obsolete — sourcing through independent channels
Panjit has marked the 1.5KE33CA_R2_00001 as obsolete. The DO-201AE axial footprint is common across the 1.5KE family, so a parametric match from the same series may fit the same board hole pattern, but no pin-compatible direct replacement is documented.
Package and rework considerations
Through-hole DO-201AE axial package — the leads are formed for wave solder or hand-soldering into plated through-holes. The junction temperature range spans -65°C to 175°C, which covers most industrial and automotive under-hood environments. No moisture sensitivity level applies to this hermetic glass-passivated construction; it survives a hot-air rework cycle without bake-out.