Device identity and key parametrics
The 1.5KE220CAHE3_B/C: Its 185 V reverse standoff voltage and 209 V minimum breakdown voltage place it squarely in the 185 V rail protection class — a common bus voltage in telecom rectifiers and industrial power supplies. Clamping is specified at 328 V maximum at the 4.6 A peak pulse current, which means a 185 V bus seeing a transient gets clipped before it reaches the downstream semiconductor ratings.
Automotive-grade qualification and deployment
This part carries AEC-Q101 qualification, the automotive discrete semiconductor stress test — it has passed the full suite of reliability screens including temperature cycling, high-temperature reverse bias, and ESD robustness.