What it is
The JST B2P-VH-FB-B is the 2-position member of the VH family, a board-to-cable/wire header series running at 0.156 inch (3.96 mm) pitch. It carries a square male pin in a single row, through-hole solder terminated, with a four-wall shroud and a locking ramp — the shroud wraps all four sides, giving polarisation and physical protection the single-wall variant lacks. Contacts are tin-plated copper alloy throughout (both mating and post), rated 10 A per circuit at 250 V AC.
Board-fit and duty class
At 0.156 inch (3.96 mm) pitch, this header sits in the mid-range power-interconnect band. The 10 A per circuit at 250 V rating defines the power bus; tin plating means the contact interface is not suited for high-cycle low-level signal mating — gold is required for that duty.