1500W surge clamp for 12V automotive rails
The 1.5KE11CAHE3_A/C: The 9.4V reverse standoff voltage means it stays out of the circuit below that threshold and only starts conducting when the transient exceeds it, clamping at 15.6V max to keep downstream electronics within their safe operating area.
AEC-Q101 qualification and temperature range
This part carries AEC-Q101 automotive qualification, meaning it has passed the reliability stress tests, temperature cycling, and PPAP requirements for automotive-grade discrete semiconductors. The -55°C to 175°C operating junction temperature covers the full under-hood thermal profile — an ECU sitting near the engine block on a hot day still has margin before the die reaches its limit. The bidirectional configuration (single channel) protects against both positive and negative transients with one device, simplifying the BOM and saving board space compared to using two unidirectional diodes back-to-back.
Package and board integration
The base product number 1.5KE11 identifies the family and breakdown voltage; the CA suffix confirms bidirectional polarity. The HE3 suffix denotes the AEC-Q101 automotive grade with the Vishay Green (RoHS-compliant) finish.