1500W Zener TVS for 81V rails
The 1.5KE100CHE3/73: It is AEC-Q101 qualified, meaning it meets the automotive-grade reliability and temperature screening required for under-hood and chassis-mounted electronics. The 81V standoff voltage makes it a fit for protecting 72V nominal DC buses, such as those found in heavy-vehicle or industrial battery systems, where transients can exceed the rail by 50% or more.
Clamping and breakdown profile
Minimum breakdown voltage is 90V, ensuring the device starts conducting before the protected circuit's absolute maximum rating is reached. The 144V maximum clamping voltage at 10.4A peak pulse current defines the worst-case voltage the load sees during a surge — critical for selecting downstream components with adequate voltage margin.
Package and board integration
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE100CHE3/73 is hand-solderable and fits standard 0.100-inch pitch prototyping grids — a plus for breadboard or repair-bench use. The axial leads allow vertical or horizontal mounting; the large body dissipates the 1500W pulse without requiring a heatsink for single-event transients.
Obsolete — sourcing through independent channels
For new designs, consider Vishay's current automotive-grade 1.5KE series parts in the same DO-201AA package — confirm the standoff voltage and clamping specs against the 81V/144V profile of this legacy part.