1500 W bidirectional TVS for 33.3 V rails
The 1.5SMC39CAH: AEC-Q101 qualification and an operating junction temperature range of -55°C to 150°C make it suitable for automotive and telecom power bus protection where the environment sees wide thermal swings.
Clamping voltage and breakdown margin
Minimum breakdown voltage is 37.1 V, giving a 3.8 V margin above the 33.3 V standoff before the device starts conducting leakage current. The 53.9 V clamping ceiling means a 12 V supply bus with a 33.3 V TVS sees the protected downstream components held below 54 V during a surge event. Bidirectional configuration (single channel) means the same device clamps positive and negative transients symmetrically, which is useful on AC-coupled signal lines or power rails that see reverse polarity faults.
Automotive-grade package and sourcing
The package footprint is standard for the 1500 W SMC family, so layout reuse across multiple TVS voltage variants is straightforward.