TransZorb 1500W Zener TVS — 7.37V standoff, axial DO-201AA
The 1.5KE9.1-E3/54: The DO-201AA axial-lead package (DO-27 equivalent) mounts through-hole on the PCB — the lead bend absorbs board flex, and the body handles repeated soldering thermal cycles without cracking the glass passivation.
Sourcing — obsolete, last-time-buy channel
No official successor order code is recorded from Vishay. For a pin-compatible replacement, a parametric search within the 1.5KE series (same package, same 1500W rating, similar breakdown voltage) is the typical path — confirm the standoff and clamp voltages match the protection window. No stock-holding claim; availability and current pricing are established at quote time.
Temperature range and pulse capability
The 109A peak pulse current at the 10/1000µs waveform is the maximum surge the device can clamp before the junction temperature exceeds the rated limit — for shorter pulses (8/20µs) the peak current capability is higher, but the datasheet curve must be consulted for the exact multiplier.