Peak pulse power and clamping for 14V rails
The 1.5SMBJ14CA-H: For a 14 V nominal rail, the reverse standoff voltage (14 V) sits below the rail so the diode stays in standby during normal operation, only conducting when the line exceeds the breakdown threshold of 15.6 V minimum. With a peak pulse current rating of 64.7 A, this part handles a direct lightning-induced transient or load-dump event on a 14 V automotive bus.
Packaged in DO-214AA (SMB), a standard surface-mount footprint with a 0.050-inch (1.27 mm) pitch — the same pad layout as many SMB Schottky and Zener diodes, so a single PCB footprint can serve multiple BOM positions for different voltage variants.