Board integration and operating envelope
The 1.5SMCJ110A: Surface-mount SMC/DO-214AB lands onto a standard IPC footprint — the dual-side cathode bar on the package is the thermal path to the board pad; adequate solder coverage under the cathode tab governs the transient thermal impedance, not the housing itself. Junction temperature rating of -50°C to 150°C covers most industrial and telecom backplane environments without derating the peak pulse rating, but a sustained clamping event above the 150°C TJ ceiling — even momentarily — accelerates degradation of the Zener junction.