What it is
The Molex 430450416 is the 4-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, 3.00 mm pitch board-to-cable male header in a surface-mount package with a board-lock feature. All four positions are loaded. The connector is shrouded on all four walls with a locking ramp — the pair requires the matching Micro-Fit 3.0 receptacle housing to engage the ramp lock. The insulation height of 0.390 inches (9.91 mm) sets the standoff above the board surface; combined with the SMT tail geometry this is a mid-profile header suited to standard reflow assembly.
Ratings that drive the fit
Current is rated 8 A per circuit — this is per-contact, not a mated-stack total, so a 4-circuit harness carrying 8 A per position is within spec. The brass contact material supports this current without excessive temperature rise at the contact interface. The contact plating is split: 15.0 µin (0.38 µm) gold on the mating face and 100.0 µin (2.54 µm) tin on the solder post. The gold grade governs mating cycle life and contact resistance at first mate; the tin post thickness is chosen for solderability shelf life and wetting during reflow. The tin-on-post side is not a signal-integrity concern — it is a solder-joint durability spec. Voltage rating is 600 V — exceeding typical wire-to-board harness voltage requirements, so voltage is not the limiting selection constraint for most industrial or automotive applications. The operating temperature range of -40°C to 105°C and UL94 V-0 flammability rating back the automotive, industrial, and medical environments listed. The board lock is the mechanical anchor that resists peel stress at the connector-to-PCB interface — critical in any harness that sees flex or vibration after board assembly. Without a board lock a header of this pitch relies entirely on solder-joint integrity under stress.
Sourcing and lifecycle
The 430450416 carries an Active product status and is ROHS3 Compliant. No official successor or cross-reference order code appears in the lifecycle record — the part is sourced to order against BOM quantity with no last-time-buy flag on record. Packaging is Tape & Reel (TR) or Cut Tape (CT) — both are compatible with standard SMT assembly workflows. Lead-free assembly is confirmed by the ROHS3 status.