400 W bidirectional TVS for 20 V rails
The SMAJ20CA-13-F: Breakdown occurs at 22.2 V minimum, so the part triggers before the rail sees damaging overvoltage, and the 12.3 A peak pulse current rating handles the surge from a typical 24 V supply transient or inductive kickback. One bidirectional channel protects a single signal or power pair, and the -55°C to 150°C junction temperature range covers both cold-start and hot-soak conditions in outdoor or industrial enclosures.
Housed in the standard DO-214AC (SMA) surface-mount package, the SMAJ20CA-13-F uses the same footprint as other SMAJ-series TVS diodes, so a single PCB land pattern serves the whole family. The SMA body is rated for the full 400 W pulse without external heatsinking — the copper pour on the cathode tab sets the thermal impedance; a 25 mm² pad area keeps junction temperature within limits during repetitive surge events. Supplied in Tape & Reel (TR) or Cut Tape (CT) for pick-and-place assembly; the reel quantity matches standard 8 mm embossed carrier per EIA-481.