The 1N4937G is a 600V, 1A fast recovery rectifier diode from onsemi in an axial DO-41 package. It features a 300ns reverse recovery time and is Pb-free.
The 1N4933G is a standard rectifier diode from On Semiconductor, rated for 50V reverse voltage and 1A forward current. It features fast recovery (≤300ns) and is housed in a DO-41 axial package.
The 1N4933 is a 50V, 1A fast recovery rectifier from ON Semiconductor. It features a 300ns reverse recovery time and is housed in an axial-lead DO-41 package.