Protection window and surge capability
The 1.5SMC170AH: The 162V minimum breakdown voltage sits above the 145V standoff, so the diode stays transparent during normal operation and only conducts when the line exceeds that threshold. The 234V clamp limits the let-through voltage to a level most downstream DC-DC converters and ASICs can survive. At 1500W peak pulse, this part handles the energy of a 6.7A transient lasting 1 ms — typical for a telecom line card or an automotive 24V system hit by a load-dump event per ISO 7637-2 pulse 5.
Package and temperature envelope for assembly
The junction temperature range spans -55°C to 150°C, covering the full automotive ambient requirement plus self-heating margin during a surge event.