What the 85 V clamp means on a 53 V rail
The 1.5KE62CA B0G: The reverse standoff voltage is 53 V, so it sits across a 48 V or 53 V nominal rail and stays off until a transient exceeds the 58.9 V minimum breakdown. At the full 18 A peak pulse current it clamps at 85 V maximum — that 85 V ceiling is what the downstream silicon sees, so the rail's absolute-max rating must be above 85 V. The DO-201AA axial package (also known as DO-27) is through-hole, which makes it a repair-bench favourite — you can pull a scorched part and solder in a replacement without hot air. Bulk packaging means it ships loose in a bag, not taped and reeled, so it's fine for prototype runs or MRO stock but not pick-and-place without manual handling.
Temperature range and where it runs
That covers the full industrial range and most under-hood automotive environments without derating the peak pulse power. No power-line protection feature — this part is for signal and DC rail transients, not AC mains.
Taiwan Semiconductor lists this as Active. The base product number is 1.5KE62, so the full order code 1.5KE62CA B0G is the bidirectional version in bulk.