What This Header Does in a Wire-to-Board Assembly
The BM20B-GHDS-G-TF(LF)(SN) is a 20-position, dual-row SMT header from JST's GHD series, designed for wire-to-board interconnects where the cable-side housing plugs into a shrouded, locking header on the PCB.
Pitch, Stack Height, and Board Fit
The mated stack height is 8.5 mm, which determines the z-height clearance above the board. The insulation height of 5.00 mm means the connector body sits well above the PCB surface, leaving room for trace routing under the header if the board layout allows.
Mating and Termination – What Crosses into the Harness
This header mates with JST GHD series cable-side housings that accept crimp terminals. Termination is solder – the header is placed on the PCB and reflowed. The outer shroud contact type means the signal path runs through the shroud, not a separate pin, which is typical for compact SMT headers in this series. Gold plating on the mating face handles repeated connect-disconnect cycles without the fretting corrosion you'd see with tin contacts in a field-service application.
Sourcing and Lifecycle – Active, No LTB Clock
RoHS compliant per the listing. Availability and current pricing confirmed at RFQ time.