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The 6.6SMDJ18A-H is an automotive-grade TVS diode designed to protect 18V DC power lines from severe transient overvoltage such as load dump and lightning surge. Featuring a 6600W peak pulse rating (10/1000µs), AEC-Q101 qualification and ISO 7637-2 compliance, it ensures fast clamping response, low leakage and stable protection performance. The DO-214AB (SMC) package provides excellent thermal and mechanical robustness.