30 positions on 2mm pitch — what that buys the board layout
The B30B-PHDSS is a 30-position, 2-row header from JST's PHD series on a 0.079" (2.00mm) pitch — the highest position count available in a 2-row PHD header, giving you 30 circuits.
Peer comparison — B32B-PHDSS at 32 positions
The B32B-PHDSS shares the same pitch, row spacing, current rating, detent lock, and overall construction — the only difference is 32 positions vs 30. If your BOM calls for two more circuits, the B32B-PHDSS is a drop-in swap on the same 2mm grid.
