6.35 mm pitch and 12 A per circuit — power-grade board-to-cable interface
The 643406-3: The 0.250" (6.35mm) pitch and 12 A per-contact rating place this header in the power-distribution class, not a signal-grade interconnect. At 600VAC, the voltage ceiling matches the insulation material's dielectric strength — the polyamide housing (UL94 V-0) holds the arc track under load. The tin-plated solder tails are compatible with standard leaded soldering profiles.
Shrouded housing with locking ramp for vibration-prone installations
The board guide feature assists alignment during through-hole insertion, reducing pin bending risk in high-volume assembly.