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The SMA6J9.0A is a unidirectional transient voltage suppression diode rated at 600W peak pulse power with a 10/1000µs waveform, designed to protect 9.0V DC power rails from lightning-induced and switching transients. It offers fast response, low leakage current, and stable clamping performance in a compact DO-214AC (SMA) package for digital and industrial electronics.