The 1N5908RL4 is a 1500W unidirectional TVS diode from onsemi with 5V working peak reverse voltage and 8.5V clamping voltage, housed in a DO-201AD axial lead package.
The 1N5908G is a 5V unidirectional TVS diode from On Semiconductor. It features an 8.5V clamping voltage and 1500W peak pulse power in an axial DO-201AD package.
1N5908 is a 1500W unidirectional Zener transient voltage suppressor from ON Semiconductor, featuring a 5V working peak reverse voltage and 8.5V maximum clamping voltage at 120A. It comes in a DO-201AD axial leaded package.