What the 1500 W rating means in a real surge event
The 1.5KE62C: That 1500 W figure is the product of the clamping voltage (89.25 V max at Ipp) and the peak pulse current (17.9 A) — it tells you the diode can absorb a single 1 ms surge up to that energy without failing short. The 53 V reverse standoff voltage means the part does not conduct at normal DC bus levels up to that point. Breakdown starts at 55.8 V minimum, so on a 48 V nominal rail the diode sits transparent until a transient pushes the line above the threshold.
Bidirectional clamping and package reality
A single bidirectional channel handles surges of either polarity — useful on AC signal lines or DC rails where the transient can swing positive or negative relative to ground. No need for two diodes back-to-back.
Obsolete — sourcing through independent channels
Littelfuse has marked the 1.5KE62C as obsolete. The part is no longer available through the factory or authorized distribution channel. We source this part through independent surplus and broker channels. Each lot is visually inspected and verified against the manufacturer's marking specification — the laser etch, date-code font, and package dimensions are checked before the material is offered.