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The SM6K20A is a high-power unidirectional TVS diode rated at 6600W peak pulse power with a 10/1000µs waveform, designed to protect 20V DC power rails from severe transient overvoltage events. Packaged in DO-218AB, it offers fast response time, low leakage current, and stable clamping performance. Typical applications include automotive electronics, industrial control power inputs, communication equipment, and energy systems requiring reliable surge suppression.