400W Zener TVS — 7V rail clamp in a DO-214AC footprint
The SMAJ7.0CA-13-F: The DO-214AC (SMA) package suits high-density surface-mount layouts where board space is tight. Rated for general-purpose circuit protection across -55°C to 150°C junction temperature, it fits environments from outdoor telecom gear to industrial control boards. The bidirectional structure means a single device protects both polarities on a signal or power line.
Clamping voltage and pulse current — what the ratings mean for rail protection
Above that, breakdown occurs at 7.78V minimum, and clamping voltage hits 12V at the rated 33.3A peak pulse current. For a 5V or 3.3V logic rail, a 7V standoff provides margin — the TVS stays off during normal operation but clamps fast when a transient exceeds the rail tolerance. At 12V clamping, 33.3A peak current is the corresponding limit — exceeding this risks thermal failure.