Clamping voltage and unidirectional confirmation
The SMAJ85E3/TR13: Maximum clamping voltage at the 10/1000 µs peak pulse current of 3.3 A is 151 V. That is the voltage the TVS holds the protected line to during a surge event — design the downstream circuitry to withstand at least that peak without damage. This is a single-channel unidirectional device, meaning it clamps only positive transients above the breakdown voltage; for bidirectional protection on AC or bipolar rails, two devices back-to-back or a dedicated bidirectional part is needed.
Standoff voltage and breakdown threshold
Minimum breakdown voltage is 94.4 V, so the device starts clamping between those two levels.
Housed in a DO-214AC (SMA) surface-mount package, supplied on tape and reel. Operating junction temperature range is -65°C to +150°C.