What the 1.5SMCJ6.5C is and what the ratings mean
The 1.5SMCJ6.5C is a unidirectional TVS (transient voltage suppressor) in the DO-214AB SMC package — this is the standard surface-mount TVS footprint used across power-supply, signal-line, and IO-protection designs. The 6.5V reverse standoff rating means the part sits idle and leaks minimally below that voltage; the 7.2V breakdown is the trigger point where conduction begins; and the 12.3V clamping maximum tells you what the downstream circuit sees at the rated 122A peak pulse current. For a 6.5V rail, this is the right pick — the standoff gives you headroom above the nominal rail, and the 1.5 kW peak pulse rating handles the inductive kick and ESD transient energy without degrading the clamp level. The "C" suffix designates bidirectional construction — one channel, symmetric clamp in both polarities. Operating junction temperature runs to 150°C, so the part tolerates the thermal soak that comes with clamped transients without entering thermal runaway if the pulse duty stays within the datasheet derating curve.
Sourcing — active production and how to buy it
Diotec Semiconductor lists this part as Active — it is a current-production line, not an NRND or EOL candidate. The part ships in strip packaging on the standard SMC (DO-214AB) footprint, so the pick-and-place parameters are identical to the full 1.5SMCJ series.