1500 W peak pulse in an axial DO-201AA body
The 1.5KE6.8-E3/54: The 5.5 V reverse standoff voltage means it starts conducting above that rail level, protecting 5 V logic or bias supplies from transients up to the clamping ceiling.
Breakdown and clamping window
Minimum breakdown voltage is 6.12 V, with the clamping ceiling at 10.8 V across the full 139 A peak pulse current. The 5.5 V standoff gives 0.62 V of margin before the device enters avalanche — tight enough for a 5 V rail but not for a 3.3 V bus.
Obsolete — sourced through independent channels
Vishay lists this part as obsolete. The axial DO-201AA footprint is common across the TransZorb family, but a direct pin-compatible replacement from Vishay is not documented.