1500 W axial TVS for 145 V rails
The 1.5KE170A B0G: Its Zener breakdown triggers at 162 V minimum, limiting the surge to 234 V maximum at the 6.7 A peak pulse current (10/1000 µs waveform).
Voltage selection and clamping margin
The 162 V minimum breakdown voltage (VBR) gives a 12% guard band above the standoff, ensuring the diode stays off during normal operation. At the 6.7 A peak pulse current (IPP), the clamping voltage holds at 234 V maximum. That 234 V ceiling is what the downstream silicon sees — verify it stays below the absolute maximum rating of the protected components, including any derating for temperature.
DO-201 axial package and board integration
The DO-201AA (DO-27) axial-lead package is a through-hole form factor that handles the 1500 W pulse without the thermal limitations of a smaller surface-mount package. The leads are tin-plated copper; the body is molded epoxy with a flame-retardant rating per the series standard. The 'No Power Line Protection' flag in the spec means it is not rated for AC mains cross-coupled transients; use it on DC buses only.
Active production and sourcing posture
The base product number is 1.5KE170; the 'A' suffix denotes a 5% tolerance on the breakdown voltage (the standard 1.5KE170 without suffix is 10% tolerance). The 'B0G' suffix indicates the Bulk packaging option — verify your pick-and-place or hand-insertion process accepts axial Bulk rather than tape-and-reel or ammo-pack.