TVS clamping performance and transient energy budget
The 1.5SMCJ85C: The 9.9 A peak pulse current is the current the TVS conducts at that clamping voltage; it sets the minimum trace width and thermal relief required on the PCB to avoid solder-joint fatigue on fast transients. 85 V reverse standoff is the continuous working voltage the diode blocks in normal operation; it sits below the 94.4 V minimum breakdown, so the TVS remains off at the rail's nominal operating voltage and only turns on when a transient exceeds the breakdown threshold.
SMC package — what the layout engineer needs to know
The DO-214AB (SMC) is a two-terminal J-bend device — the cathode band is the first bend from the body, so orientation on the PCB matters for unidirectional polarity. The typical recommended land pattern follows IPC-7521; the exposed metal pad on the bottom must be well-soldered across its full width, as it is the primary heat path from junction to board.
No official successor or cross-reference appears in the ledger, so sourcing relies on the Diotec family channel and spot-market availability through independent distribution.