The 1N4148TA is a small signal switching diode from onsemi, rated for 100V repetitive reverse voltage and 200mA average rectified forward current. It comes in a DO-204AH (DO-35) through-hole package.
1N4454TR is a 50V, 200mA ultra fast switching diode from On Semiconductor in a DO-35 axial package. It features 4ns reverse recovery time and 500mW power dissipation.
The 1N4148-T26A is a standard small signal diode from onsemi, rated for 100V reverse voltage and 200mA average rectified current, with a fast 4ns reverse recovery time.