JST B3B-PH-TW-S — 3-Position 2.00mm Pitch PH Series Plug
The JST B3B-PH-TW-S is a 3-position plug from the PH series, built around a 0.079" (2.00mm) pitch. It terminates in-line — free hanging — and carries male pins on a single row. The 3-position count is the defining BOM line match: if your assembly calls for three circuits at this spacing, this is the plug that fits.
The 2.00mm pitch is the tightest common spacing in the JST PH family — it gives you a compact footprint without forcing the 1.25mm or 1.00mm routing constraints of micro connectors. For a board layout engineer, that 0.079" centres means the mating header footprint stays within a narrow keep-out zone, leaving room for passives or traces between positions. The 3-position width across the plug body is about 6mm, which fits a tight harness breakout.
Mating and Termination — PH Series Compatibility
This plug mates with any JST PH series receptacle housing that accepts male pins on 2.00mm pitch — the standard PH crimp housings (e.g., PHR-3, PHR-2, etc.) are the mating half. Termination is crimp-style: the male pins are inserted into the plug body after crimping to the wire. The free-hanging inline mounting means no board footprint is needed on the plug side — it terminates at the wire end of the harness.