The BM03B-SRSS-TB(LF)(SN): The 1.00 mm pitch (0.039 in) on this 3-position header sets a tight board footprint — the contact-to-contact spacing forces a finer trace-and-space rule than standard 2.54 mm headers, which matters when routing signal traces between the pads on a dense PCB. The single-row layout with all positions loaded gives a compact 3.00 mm wide body, keeping the z-height at 4.25 mm above the board surface when mated.
SMT Soldering and Solder Retention Anchoring
The solder retention feature is standard on the SRSS series; it improves board-level reliability in applications where the mated connector sees periodic cable movement, like portable device internal harnesses.
The mated stack height is 4.9 mm, which fits within the clearance budget of most compact enclosures.
Current and Voltage Ceiling for Signal Duty
The tin-on-tin contact interface (mating and post finish both tin) limits the current capacity and the mating cycle life to about 30 cycles before fretting corrosion may increase contact resistance.
The base product number is BM03B-SR; the suffix -TB(LF)(SN) indicates a tape-and-reel package with lead-free plating.