1.5KE68A/B — 1500W Zener TVS in DO-201 Axial
It is housed in a DO-201AA (DO-27) axial-lead package for through-hole mounting. The device is designed for general-purpose circuit protection, clamping transient overvoltages to protect downstream semiconductors. The 1500W rating at 10/1000µs pulse means it can absorb substantial surge energy in a single event — suitable for industrial power supplies, telecom line cards, and automotive load-dump clamping where the axial package allows easy board or point-to-point wiring.
Voltage ratings and clamping performance
The reverse standoff voltage is 58.1V (typical), meaning the diode does not conduct appreciably below this rail voltage. Peak pulse current is 16.5A for the standard 10/1000µs waveform. The 1500W power rating is the product of clamping voltage and peak current at that pulse width; for shorter pulses the device can handle higher peak currents, and for longer pulses the power must be derated.
Temperature range and package fit
The DO-201AA axial package (also known as DO-27) has a body diameter of about 5.3 mm and a lead diameter of 1.3 mm, fitting standard 0.040-inch diameter holes on a 0.400-inch lead spacing. The through-hole axial form factor is straightforward to hand-solder or wave-solder. No power line protection feature is built in — this is a pure transient suppressor, not a crowbar or active clamp.