Clamping voltage and standoff margin
The 1.5SMBJ58CA-H: Above that, breakdown occurs at 64.4 V min, and the clamping voltage reaches 93.6 V at the rated 16.1 A peak pulse current. The 36 V gap between standoff and clamp gives the protected circuit headroom during a surge. The DO-214AA (SMB) package is a standard surface-mount footprint that reflows on a standard profile — check the MSL before the bake decision, but the package itself places cleanly with no tombstoning risk at typical paste volumes.