Transient suppressor for signal-line protection
The 1.5KE68A-TP is a 1500W unidirectional Zener TVS diode from Micro Commercial Co, housed in a DO-201AE axial-lead package. The 64.6V minimum breakdown voltage gives a 6.5V margin above the 58.1V standoff — enough headroom to avoid nuisance triggering from normal rail ripple while still clamping fast before the protected circuit sees damaging overvoltage.
Clamping voltage and energy rating
Maximum clamping voltage is 92V at the peak pulse current Ipp — this is the voltage the downstream components must survive during a transient event. A lower clamping voltage means tighter protection; 92V is typical for a 1500W TVS in this voltage class. For a 68V nominal rail, this translates to roughly 16A of peak pulse current before the junction exceeds its thermal limit.
Through-hole package for high-reliability builds
The DO-201AE axial package is a through-hole form factor with a 0.052-inch (1.3 mm) diameter lead. It handles the thermal cycling and surge current of repeated transient events better than equivalent surface-mount packages, making it a common choice for industrial power supplies, motor drives, and telecom rectifiers. Available in Tape & Reel for automated insertion or Cut Tape for prototype and low-volume builds. The power line protection flag is marked 'No' — this part is specified for DC signal and secondary power rails, not AC mains primary protection.
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