What the 400W rating means on a 33V rail
The SMAJ33A-13-F: When a transient exceeds the minimum breakdown voltage of 36.7 V, the diode avalanches and clamps the surge to a maximum of 53.3 V while shunting 7.5 A of peak pulse current in the 10/1000 µs waveform. The 400 W peak pulse power rating tells you the energy-handling capacity at that pulse shape — a higher standoff voltage means lower peak current for the same power rating, so this 33 V part handles less surge current than a lower-voltage SMAJ part.
DO-214AC (SMA) footprint and board integration
The diode comes in the DO-214AC (SMA) surface-mount package, with the supplier device package designated as SMA. The footprint is standard for this package class — the cathode is marked by a band on the body, and the small outline suits automated pick-and-place assembly. The wide range means the clamping performance is specified across the full temperature band, not just at 25°C — leakage current will increase at the hot end, but the avalanche breakdown voltage shifts predictably.
Active production and sourcing posture
Sourced through independent distribution channels.