Obsolete — sourcing through independent channels
Microsemi has marked the 1.5KE150CAE3/TR13 as obsolete, so new-production buys from the factory are no longer supported.
1500 W peak pulse — the clamp current ceiling
The 128 V reverse standoff means the device stays transparent on a 120 V nominal rail and only conducts when the transient exceeds the 143 V minimum breakdown voltage.
Bidirectional, single-channel, through-hole
A single bidirectional channel handles symmetrical clamping — useful where the signal or power rail swings both sides of ground. The DO-201AA (DO-27) axial through-hole package suits point-to-point wiring on legacy boards or high-reliability assemblies where a solder joint is preferred over a surface-mount fillet.