Automotive TVS for 60V rail protection — now obsolete
The 1.5KE75CHE3/73 is a 1500W peak pulse power TransZorb Zener TVS diode from Vishay's automotive-grade AEC-Q101 qualified series.
Clamping performance and breakdown characteristics
Under a 10/1000µs surge waveform the device clamps at 109V maximum while conducting 13.9A peak pulse current — this clamping ceiling protects downstream silicon rated for 100V or higher. It is a single bidirectional channel device; the TransZorb construction delivers fast avalanche response with no power line protection feature — it is a pure transient suppressor, not a crowbar or filter.
AEC-Q101 qualification and the TransZorb series
The Automotive, AEC-Q101, TransZorb designation means this part passed the full automotive stress suite: temperature cycling, high-temperature reverse bias, and humidity bias at the die level. The 175°C maximum junction temperature rating allows placement near exhaust manifolds or turbocharger heat zones where ambient soak exceeds 125°C.