The SMAJ7.0CE3/TR13: That removes the single-sourcing worry for a protection diode that often sits on a BOM for years without revision.
Bidirectional Zener TVS — 500W surge rating
The peak pulse power rating of 500W (10/1000 µs waveform) defines the energy it can absorb before the junction fails; for a 7V standoff line, that translates to a peak current of 37.8A.
Breakdown occurs at a minimum of 7.78V, and the clamping voltage at peak current is 13.3V. That 5.5V window between standoff and clamp is the voltage headroom the downstream circuitry must survive.
DO-214AC (SMA) — surface-mount footprint
Temperature range and general-purpose use
The device is classified for general-purpose applications, so it fits power-supply input protection, signal-line clamping, and DC bus transient suppression without special qualification overhead.