Automotive TVS with AEC-Q101 pedigree
The 1.5KE33CHE3/54: Its 26.8V reverse standoff voltage and 47.7V clamping at 31.4A peak pulse current (10/1000µs waveform) make it a fit for 24V vehicle electrical systems where load-dump and inductive transients need suppression.
Clamping and temperature envelope
Breakdown occurs at 29.7V minimum, clamping the line to 47.7V at the rated 31.4A peak pulse current. Single bidirectional channel means one device clamps both polarities — useful on signal or power lines where the transient can swing either direction, saving board space versus two unidirectional diodes back-to-back.
Obsolete — sourcing via independent channels
Vishay has marked the 1.5KE33CHE3/54 as obsolete. The part is available through independent surplus and broker channels; each lot is traceable and confirmed against the BOM at quote time. For a BOM locked to this Vishay order code, the DO-201AA axial footprint and AEC-Q101 qualification are the fixed parameters. A cross-reference to a current-production equivalent would require a board-level review of the clamping voltage and peak pulse current match.