400W bidirectional TVS in DO-214AC
It clamps transients to 42.1V maximum at 9.5A peak pulse current. The bidirectional configuration protects signal lines that swing above and below ground — common on AC-coupled data interfaces, RS-485 transceivers, and bipolar supply rails.
Clamp voltage and pulse current
At the 10/1000µs test waveform, the maximum clamping voltage is 42.1V with a peak pulse current of 9.5A. The breakdown voltage range starts at 28.9V minimum, so a 24V nominal rail with 10% tolerance (26.4V max) stays below the trigger threshold. The 400W peak pulse power rating gives a derating margin for repetitive surges — typical for industrial I/O and telecom line cards.
Surface-mount DO-214AC footprint
The DO-214AC (SMA) package is a standard surface-mount outline with a cathode tab (anode for the bidirectional variant is symmetrical — no polarity concern). No power line protection feature — this is a signal-line or low-power rail device, not a mains surge suppressor.