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The 6.6SMDJ18CA-H is an automotive-grade bidirectional TVS diode engineered to suppress high-energy transient overvoltage on 18V DC power lines. Rated at 6600W peak pulse power (10/1000µs) and compliant with AEC-Q101 and ISO 7637-2, it delivers symmetrical clamping, fast response and robust surge endurance. The DO-214AB (SMC) package supports compact, high-reliability automotive and industrial designs.