The BAT 60B E6433: The Infineon BAT 60B is a Schottky rectifier rated for 10 V DC reverse voltage and 3 A average rectified forward current, packaged in a SOD-323 (PG-SOD323-2) surface-mount case. The 3 A rating is unusually high for this tiny footprint — the junction temperature maxes at 150 °C, so the thermal path through the PCB pads and copper area is what actually determines how much current it can carry in your design. Forward drop is specified at 600 mV maximum at 1 A, which is typical for a 10 V Schottky in this current class.
Fast recovery — under 500 ns
Listed as a fast recovery diode with switching time under 500 ns at >200 mA forward current. That puts it in the range for high-frequency rectification in DC-DC converters, freewheeling clamps, and reverse-polarity protection where you need the Schottky's low forward drop but also want clean turn-off. The 30 pF junction capacitance at 5 V (1 MHz) is low enough to keep switching losses manageable at moderate frequencies.
Obsolete — sourcing through independent distribution
Infineon lists the BAT 60B E6433 as obsolete. No direct replacement is listed by Infineon — the base product number is BAT 60, and the closest functional match would be another 10 V Schottky in SOD-323 with a 3 A rating, but pin-compatibility and footprint should be verified against the specific application.
MSL and reflow — check the bake before the oven
SOD-323 is a small, low-mass package that reflows cleanly with standard lead-free profiles. The small body means tombstoning risk is low with balanced pad geometry, but the 3 A rating calls for adequate copper on the cathode pad to sink heat away from the junction.