120V rail clamp in a DO-214AC footprint
It clamps at 193V maximum while handling 500W peak pulse power — enough for general-purpose surge protection on industrial control, telecom, or power-supply secondary rails. The DO-214AC (SMA) package is a common surface-mount footprint; the copper pad area under the cathode tab sets the junction-to-ambient thermal resistance, so the PCB layout directly affects derating at elevated temperatures.
Clamping voltage and pulse current
With a breakdown voltage minimum of 133V and a clamping ceiling of 193V at 2.6A peak pulse current (, 10/1000µs waveform), this part leaves a 73V window between the 120V rail and the clamp — enough margin for most 120V-rated downstream components without sacrificing protection speed. The unidirectional configuration means it conducts only in one polarity; for AC or bidirectional rails, two devices or a bidirectional TVS would be needed.