With a reverse standoff voltage of 18V and a maximum clamping voltage of 29.2V at 17.2A peak pulse current, it protects downstream circuitry from surges up to 500W peak pulse power. The bidirectional configuration means a single device guards both polarities on a signal or power line, simplifying BOM count on AC-coupled or bipolar interfaces.
Rated for junction temperatures from -65°C to 150°C, this part handles the thermal extremes found in outdoor telecom cabinets, automotive underhood modules, and industrial control enclosures. The wide range also provides margin when the TVS self-heats during repetitive surge events — the 150°C ceiling is the absolute limit, not a continuous operating target.
Supplied in a DO-214AC (SMA) surface-mount package on Tape & Reel, the SMAJ18CAE3/TR13 is ready for automated pick-and-place and reflow assembly. The SMA footprint is a common industry standard, so no board redesign is needed when substituting between TVS vendors in this package.
For BOM planning, this removes the obsolescence risk that haunts older TVS families.