Standoff, breakdown, and clamping — the three numbers that define TVS protection
The 5.0SMDJ85A/TR13: The standoff voltage of 85V is the working rail this TVS watches: it remains off and draws only leakage current until a transient pushes the line above the breakdown threshold. The minimum breakdown of 94.4V is where conduction begins, and the 137V maximum clamping voltage is the ceiling imposed across the protected load during the peak pulse event — that is the figure the downstream circuit must survive. The 5kW peak pulse power rating defines the device's energy-handling ceiling at that standard transient waveform — this is the primary selection parameter for any TVS in this power class.
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