This is a single bidirectional channel device — it responds to both positive and negative transients, which suits AC lines or floating signal pairs where polarity is not fixed.
Housed in the DO-214AA (SMB) package, also referred to as the SMBJ (DO-214AA) supplier device package. This is a standard surface-mount footprint shared across many TVS families — the board layout is straightforward and the part mates with common SMB solder pads.
