400 W bidirectional TVS in a standard SMA footprint
The SMAJ11CA-13-F: The 11 V reverse standoff voltage (12.2 V minimum breakdown) means it sits across a 11 V rail and stays transparent until the transient pushes past the breakdown knee — then it clamps hard enough to keep downstream silicon inside its abs-max rating.
Voltage selection and clamping margin
The bidirectional channel means a single device guards both polarities on the same line, which saves board space on AC-coupled or differential signal pairs. For shorter transients (8/20 µs, common in ESD or lightning indirect strikes), the peak current capability is higher; the datasheet's pulse-derating curve gives the multiplier.
Package and board-fit for field replacement
The SMA package is large enough to hand-solder with a fine-tip iron — no hot-air station required — so a field swap on a control board or power supply is feasible with the kit I carry. The tape-and-reel packaging (also available as cut tape) suits both automated pick-and-place and small-quantity bench work.