The 100.0 µin (2.54 µm) tin finish on the mating interface is adequate for infrequent mating cycles — typical for one-time assembly or field-service swaps under 50 cycles. The UL94 V-0 black glass-filled polyester housing handles the 5 A load without thermal concern in still-air environments.
The 0.100-inch (2.54 mm) pitch and dual-row layout mean the 93939-402HLF occupies a 2 × 1 grid of 0.040-inch square pins. The unshrouded design gives the board layout engineer direct access to the solder joints for inspection and rework. The 0.120-inch (3.05 mm) post length suits standard 0.062-inch (1.6 mm) PCBs; the 0.160-inch (4.06 mm) mating pin length engages the receptacle contact fully without bottoming out.