Three-Position, One-Millimeter Pitch — Where This Header Fits
The SM03B-NSHSS-TB (LF)(SN): The right-angle SMT orientation keeps the mated wire parallel to the board surface — useful when z-height above the PCB is tight.
Board Layout and Termination Checklist
Right-angle orientation means the connector body overhangs the board edge by about 4.40 mm (the insulation height).
How the 3-Position Differs from the 4-Position Sibling
The only difference between SM03B-NSHSS-TB (LF)(SN) and SM04B-NSHSS-TB (LF)(SN) is the circuit count: 3 positions vs 4. Pitch, current rating, voltage, mounting orientation, shrouding, and latch type are identical. If your BOM calls for 4 positions, order the SM04B variant — no other spec changes.