SZSMF4L10CAT3G

The SZSMF4L10CAT3G is a bidirectional automotive TVS diode from Littelfuse in a flat-lead SOD-123FL package, for protecting 10 V rails and data lines in body electronics, infotainment and industrial controls. Peak pulse power is 400 W on the 10/1000 us waveform, with a 10 V reverse standoff voltage, a breakdown window of 11.10 V to 12.30 V at 1 mA test current, and a maximum clamping voltage of 17.0 V at a 23.5 A peak pulse current; reverse leakage is 5 uA maximum at standoff. The SZ prefix denotes AEC-Q101 qualification for automotive environments, and the CA suffix marks the bidirectional configuration. Selection advice: match the clamping voltage to the absolute maximum rating of the IC being protected - the 17.0 V clamp suits 10 V-class rails, but if the downstream device is a 12 V automotive input with load-dump exposure, evaluate whether a higher-power TVS family is needed instead of stretching this 400 W part. Parameters verified against Littelfuse documentation.