The 1N6276AHE3/51: At that current the clamping voltage is defined, so the downstream load sees no more than 22.5 V regardless of the surge amplitude up to the rated 1500 W peak.
Automotive grade, wide temperature band
The 175 °C ceiling is the actual junction limit; the thermal resistance from junction to ambient determines what continuous dissipation is safe at the PCB level.
Axial leaded, board integration
DO-201AA (DO-27) through-hole package accepts hand or wave assembly. The axial leads mean the device sits perpendicular to the PCB — adequate creepage on the transient line is set by lead spacing, not by a surface-mount land pattern. Bulk packaging is the standard format for through-hole TVS; tape-and-reel variants in this series exist but this specific date code ships loose.