I'm trying to reproduce the following schematic but it's designed with SMD components, I want to build it with the TPH equivalents, the problem is with diodes, I have found S1A is equivalent to 1N4001 diode but what about SS24?
Find Key features of the component
i.e. for a diode - maximum Forward voltage drop - I ave - I peak - power dissipation - Temperature rating
Go to a site such as Farnell. Select the above criteria as filters. Select all through hole components and that should get you relevant components. Make sure to double check with the component datasheet when you find a component you like.