Surge clamp for 171V rails – 1.5kW pulse rating
The 1.5KE200AG is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, designed to clamp transients on a nominal 171V DC rail. Its 1500W (1.5kW) peak pulse power rating per the 10/1000µs waveform gives it the energy capacity for industrial surge events — motor drives, power supplies, and heavy equipment I/O lines are typical deployment points. The 274V clamping voltage at 5.5A peak pulse current sets the upper limit the downstream circuitry must survive.
Obsolete – sourcing window is closing
onsemi lists the 1.5KE200AG as Obsolete. No official successor or cross-reference is published by the manufacturer. For a BOM line that still calls out this exact order code, the practical path is to secure remaining distributor stock or evaluate a parametric equivalent from the same 1.5KE family — the 1.5KE200A (without the G suffix) or the 1.5KE200CA bidirectional variant share the same DO-201AD package and voltage ratings. Confirm the date code and lot traceability before committing to any lot found on the open market.
DO-201AD axial – through-hole assembly fit
The DO-201AD axial package is a through-hole form factor that sits well in high-reliability, high-temperature environments — the -65°C to 175°C junction temperature range supports industrial and automotive underhood use. The axial leads require manual or wave-solder assembly; no MSL concern since the part is not moisture-sensitive plastic. For a rework lab tech, the body diameter and lead spacing match standard axial-lead insertion tooling.