It clamps transients at 49.9V max when the surge current hits, with a reverse standoff voltage of 30.8V — meaning it sits across a 30V rail and stays out of the way until a spike arrives. The DO-201AD axial package is a through-hole part — easy to swap on a bench or in the field if you have a soldering iron and a desoldering pump. No hot-air station needed.
onsemi lists the 1N6284ARL4 as Obsolete. For BOM lines that still call this order code, supply is through independent distribution only — quoted per RFQ against your quantity.
Minimum breakdown voltage is 34.2V, so the diode starts conducting at that threshold. If your downstream silicon has a 50V absolute max, this part leaves almost no margin. That covers military/aersoace cold soak and under-hood engine bay heat. No power line protection — it is a unidirectional TVS, not a bidirectional or rail-to-rail clamp.