BAS40-05 is an SMD small signal Schottky diode featuring a common cathode configuration, designed for high-speed switching, signal processing, and polarity protection applications. The device exhibits very high switching speed with a reverse recovery time of less than 5 ns and low junction capacitance of less than 5 pF, enabling efficient operation in fast-switching circuits. It is rated for a maximum average forward current of 200 mA, a non-repetitive peak forward surge current of 600 mA, and a reverse voltage rating of 40 V, with forward voltage less than 0.38 V at 1 mA. The BAS40-05 is packaged in SOT-23 (TO-236) format and is compliant with RoHS and REACH regulations, making it suitable for signal processing, high-speed switching applications, and circuits requiring polarity protection in consumer and industrial electronics.