Transient protection with a 1500W peak pulse ceiling
That 1500W rating defines the surge energy it can clamp before the junction gives way — for a 7.78V standoff line, this part handles transients that would blow a lower-rated device.
Clamping window and breakdown margin
Reverse standoff voltage is 7.78V typical; the breakdown starts at 8.65V minimum, and clamping maxes at 13.4V at rated Ipp. That 5.6V window from standoff to clamp means the protected rail sees less than 14V during a surge — critical for 12V nominal bus protection where the downstream silicon must survive the clamp.
Obsolete status and sourcing path
onsemi lists the 1N6270ARL4G as Obsolete. We can quote against your quantity from available stock — no lead time from the fab, but we confirm availability at quote time.
Package and mounting fit
The lead bend and hole diameter on the PCB match the 0.040-inch lead diameter; no board respin needed if you are replacing a 1.5KE7.5A or similar.