2.54 mm Pitch, 4 Circuits — BOM Fit Check
The 4-position count with all positions loaded matches a 4-circuit BOM line.
The tin-plated solder tails (78.7 µin) are compatible with standard lead-free soldering processes.
Through-Hole Mounting — Board Retention
The 0.526" (13.35 mm) overall contact length includes a 0.305" (7.75 mm) mating length, which accommodates standard 0.100" pitch receptacles.
Wide Temperature Range — Industrial Duty
The thermoplastic housing (UL94 V-0) and phosphor bronze contacts handle thermal cycling without degradation. The black insulation color provides visual contrast for inspection.
Peer Comparison: 10-Position vs 4-Position
Both share the 0.100" pitch, dual-row layout, 3 A rating, 30.0 µin gold mating finish, and through-hole termination. The 10-position variant is the choice for a 10-circuit BOM; the 4-position 77313-122-04LF is the fit for a 4-circuit line. The 77313-101-04LF is another 4-position sibling with a slightly shorter overall contact length (0.425" vs 0.526") — verify the mating length requirement before substituting.