AEC-Q101 TVS for 12V/24V automotive bus protection
The 1.5KE20AHE3_A/D: Its 17.1V reverse standoff voltage and 27.7V clamping point make it a fit for protecting 12V and 24V nominal supply rails against load-dump and inductive-load transients. AEC-Q101 Grade 0 qualification means the part has passed the full reliability stress suite for automotive-grade discrete semiconductors.
Clamping voltage and peak current — the protection window
Breakdown voltage starts at 19V minimum, with a 17.1V standoff voltage below which the diode draws negligible leakage. For sustained repetitive transients, the average power dissipation must stay within the package's thermal limits.
Through-hole axial package for board-level integration
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE20AHE3_A/D mounts through-hole. The lead spacing and body diameter match standard 0.100-inch pitch PCB layouts. The axial form factor allows either vertical or horizontal mounting depending on board clearance. The Tape & Box (TB) packaging option suits automated insertion equipment. The 1.5KE base product number covers the full voltage range; the A suffix indicates 5% tolerance on breakdown voltage.
Active production — no last-time-buy pressure
Vishay lists the 1.5KE20AHE3_A/D as Active in production. No official successor or pin-compatible alternative is listed — the 1.5KE20AHE3_A/D is the current production variant for this voltage and power class. For volume requirements, pricing and lead time are confirmed at quote against the BOM quantity.