1.5 kW peak pulse power, 30 V standoff
The 1.5SMBJ30CA: The 30 V reverse standoff voltage means the part stays non-conductive below that rail — it triggers only when the transient pushes above 33.3 V breakdown, typical for 24 V or 28 V DC buses that see inductive kickback or load-dump surges.
DO-214AA SMB footprint and thermal path
Housed in the DO-214AA (SMB) surface-mount package, the 1.5SMBJ30CA mates with a standard SMB land pattern. The junction operates from -55 °C to +150 °C, covering the full industrial temperature range — the peak power derating curve starts above 25 °C, so a 1500 W rating at room temperature drops linearly to zero at 150 °C. For a 1.5 kW pulse at 85 °C ambient, budget roughly 60 % of the rated power.