Vishay Intertechnology's SMBJ18CA is a bidirectional TRANS VOLTAGE SUPPRESSOR DIODE with a max clamping voltage of 29.2 V and a breakdown voltage of 21.05 V. It is surface mountable and commonly used in transient suppression applications.
SMMBT3904LT1G by Onsemi is a NPN BJT with 3 terminals, 0.3W power dissipation, and 40V max collector-emitter voltage. Ideal for small outline applications requiring a transistor with hFE of at least 30, it operates up to 150°C and has a transition frequency of 300MHz.
1N4148WS-7-F by Diodes Inc. is a single rectifier diode with max reverse recovery time of 0.004 us and max reverse current of 1 uA. It operates b/w -65 to 150 °C, ideal for applications requiring small outline surface mount diodes with a max output current of 0.15 A.