Just to add to what the good Doc said:
1N4001 are rated at 50v (PIV), 1N4002 at 100v (I think), 1N4003 at 200v (I think), 1N4004 at 400v (I know), etc, up to 1N4007 (around 1000v).
I used to know the series off by heart, but it's been a long time and the data has faded in my grey matter.
So, in conclusion, and confirming the Doc's prognosis, you can always use one that has the same or a higher part number than the one specified in a schematic.
”Sex is great - but you can’t beat the real thing !” - The Wanker’s Handbook