1.5 kW clamp in a DO-201 can
The YAGEO 1.5KE180A/B is a 1500 W peak-pulse Zener TVS diode in the 1.5KE series, designed to clamp transients on general-purpose DC rails. The breakdown voltage range (171 V min) means it starts conducting just above the standoff level, shunting the surge energy to ground before it reaches downstream silicon. The 1500 W rating is the peak power it can absorb in a single pulse — useful for secondary protection on 120–150 VDC rails or telecom line cards.
Package and field-fit
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE180A/B is a through-hole part — the kind you can swap on site with a soldering iron and a pair of cutters, no hot-air station needed. The unidirectional configuration (single channel) means it protects one rail per device, with the cathode band marking the polarity.
No pin-compatible second-source is listed, but the 1.5KE series is widely cross-sourced across TVS manufacturers; a parametric search on 154 V standoff and DO-201 package yields functional equivalents.