Automotive-grade TVS for 12V rail protection
The 1.5KE12AHE3_A/D is a 1500W peak-pulse-power TransZorb TVS diode from Vishay's automotive-qualified series, built to clamp transients on 12V DC power rails in engine-bay and cabin electronics.
Clamping voltages and pulse current
The 1500W peak-pulse rating at 25°C derates with temperature; at 175°C junction the derating factor is approximately 0.65×, so the effective pulse-handling drops to about 975W — a consideration for high-temperature engine-bay placement.
Package and board integration
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the part mates with standard 0.040-inch diameter holes on a 0.300-inch lead spacing — the same footprint used across the 1.5KE series, simplifying BOM consolidation. The tape-and-box packaging (TB suffix) delivers the diodes in ammo-pack format for axial insertion machines; each reel holds 1400 pieces per the standard 1.5KE series packaging quantity.
AEC-Q101 qualification and compliance
The 'HE3' suffix denotes AEC-Q101 automotive qualification — the part has passed the full suite of stress tests (temperature cycling, HTRB, autoclave, solder heat resistance) required for Tier-1 automotive PPAP submissions.