Clamping voltage and peak pulse current
The SMCJ30A-13-F: Its 48.4 V maximum clamping voltage at the rated 31 A peak pulse current (10/1000 µs waveform) defines the voltage the downstream circuitry must survive during a surge event — if the protected device's abs-max rating sits below 48.4 V, this TVS will not clamp fast enough to prevent damage.
The DO-214AB (SMC) package is the standard footprint for this power class — the same pad layout used by Littelfuse and Vishay SMCJ-series parts, so a board already laid out for a 30 V SMC TVS accepts this part without a spin.
Temperature range and deployment context
The 30 V reverse standoff voltage (working voltage) means the TVS draws negligible leakage below 30 V — it sits transparently across a 24 V or 28 V bus and only conducts during an overvoltage event.