I'm trying to find suitable connectors for a PCB I'm designing and it's been rather difficult. I usually use Molex because their website makes it easy to find matching male female connectors. However, I'm looking to get some JST connectors this time since they're much cheaper than Molex.
However, I'm having trouble confidently picking two connectors which I know are going to be compatible. I'm looking to get the following 4 pin JST header to go on the PCB (Part No S4B-PH-K-S).
This connector has a pitch of 2mm so I looked for 2mm wire assemblies on Digikey (Since I don't have the tools to make them myself) and I found the following which I think might fit (Part No A04KR04KR26E51A)?
However, I'd be lying if I said I was confident they are compatible. Is it enough to say since they have the same pitch that they'll fit? Where does JST document which connector mates with certain header or where can I find out?