58V rail clamp – 500W peak pulse in DO-214AC
Its 64.4V minimum breakdown voltage and 93.6V clamping point at 5.3A peak pulse current (10/1000µs waveform) give a 35.6V window between the rail and the clamp — enough margin for most 48V to 58V bus applications without nuisance triggering. Rated for 500W peak pulse power, this part absorbs surge energy in a DO-214AC (SMA) package that reflows on standard lead-free profiles.
Clamping voltage and pulse current – sizing the protection
At the 10/1000µs test waveform, the SMAJ58AE3/TR13 clamps 5.3A peak pulse current to 93.6V maximum. That clamping voltage is the ceiling the downstream circuitry must survive — a 100V-rated MOSFET or 80V-rated capacitor on the same rail would see margin erosion during a surge event. The 58V reverse standoff means the diode draws negligible leakage below that rail voltage, so it won't load the supply during normal operation. For AC mains or long DC bus runs, pair it with a fuse or PTC upstream.
Active production – sourcing through distribution
Cut Tape (CT) is also available for prototype or low-volume builds.