70 V blocking, 70 mA continuous — sizing the rail clamp
With a maximum DC reverse voltage of 70 V and a forward voltage drop of 1 V at 15 mA, this diode comfortably clamps 5 V, 12 V, and even 24 V supply rails without exceeding the blocking rating. The 70 mA average rectified current per diode handles signal-level loads and transient energy; for sustained currents above that, the junction temperature ceiling of 150 °C sets the thermal limit. Reverse leakage is 100 nA at 50 V, which keeps quiescent draw negligible in battery-powered or high-impedance sense circuits.
Dual diode in SOT143-4 — footprint and routing
The two independent Schottky diodes share a common cathode? No — the BAS70-07E6327 uses a 2-independent configuration, meaning each diode has its own anode and cathode, giving the layout engineer full flexibility to route separate clamp paths, steering diodes, or a full-wave rectifier from one package. The PG-SOT143-4 footprint (TO-253-4 variant) is a compact 2.9 mm × 1.3 mm body, surface-mount only. No exposed thermal pad, so heat management relies on the PCB copper — keep the trace width generous for the 70 mA per-diode continuous current.