Device identity and headline ratings
The BAS40E6433HTMA1 is a 40 V, 120 mA Schottky barrier diode in the standard SOT-23-3 surface-mount package. The 40 V reverse voltage covers low-voltage rails and signal-line clamping; the 120 mA average rectified current suits small-signal and auxiliary supply paths, not bulk power rectification.
Switching speed and forward drop
Reverse recovery time is 100 ps — fast enough for high-frequency switching in DC-DC converter snubbers, charge pumps, and RF detector circuits where a standard pn-junction diode would ring or dissipate.
The 5 pF capacitance at 0 V reverse bias keeps the diode transparent in high-speed data lines and RF matching networks.