Automotive-grade transient suppression for 5V rails
It protects a single 5V rail (reverse standoff voltage) with a minimum breakdown voltage of 6.4V and clamps transients up to 13.4V at peak pulse current.
What the 400W rating means for your BOM
For a 5V supply, this translates to a clamping voltage of 13.4V at 174A (8/20µs waveform), which is enough to shunt high-energy load-dump or inductive kickback transients before they reach the protected IC. The bidirectional channel means you can place it across a differential pair or a single supply line without worrying about polarity — it clamps both positive and negative surges.
Housed in a DO-214AC (SMA) surface-mount package, the same footprint used across the SM4T family. The SMA body is reflow-friendly with standard lead-free profiles; no special bake-out beyond MSL 1 handling. The compact 2-lead package fits tight automotive ECU layouts where board space is at a premium.
Active lifecycle status from STMicroelectronics — no NRND or EOL flags. For a BOM line requiring AEC-Q101 qualified protection on a 5V rail, the SM4T6V7CAY is a clean fit with no last-time-buy risk.