What this connector is
The Molex 430451015 is the 10-circuit dual-row member of the Micro-Fit 3.0 43045 header series — a 0.118" (3.00 mm) pitch SMT header with a four-wall shroud and locking ramp, rated 8 A per circuit at up to 600 V across a -40°C to 105°C operating window. Tin-plated brass contacts at 60.0 µin (1.52 µm) on the mating face handle the full 8 A rating — tin-on-tin is the series-standard economical finish, suited for high-cycle power interconnects in automotive, industrial, and medical harness applications where the mating half is the matching Micro-Fit 3.0 receptacle housing. The header mounts via SMT solder joints with integral board-lock features that retain the body during reflow and vibration — the 0.390" (9.91 mm) insulation height and dual-row 0.118" row spacing define the footprint and keep-out volume on the board.
Key ratings and what they mean
8 A per circuit at 600 V puts this in the power-interconnect class, well above signal-header ratings. The current rating is per contact — circuit the load so that no single pin carries more than 8 A continuously. At this contact count the connector can support multiple independent power pairs or a single higher-current bus, depending on how the harness splits the return. Tin plating at 60.0 µin (1.52 µm) gives solid low-resistance contact but fewer reconnection cycles than gold — for field-serviceable applications where the header will see repeated mate/unmate cycles, confirm the expected cycle count against the series' published durability curve. The tin finish is the right choice for production mating where cycling is low. The four-wall shroud with locking ramp is the series' mis-mate prevention — it keys to the matching Micro-Fit 3.0 receptacle housing and resists vibration decoupling. If the application calls for sealed or latched wire-to-board runs, confirm the housing carries a secondary TPA (Terminal Position Assurance) feature to lock the crimp terminals before the connector ships as a mated assembly. UL94 V-0 rated liquid crystal polymer housing material handles the 105°C upper operating limit without compromising the insulator — this is the right material choice for under-hood and enclosed industrial environments where the connector sits above ambient.
Sourcing and compliance
Available in Tape & Reel (TR) and Cut Tape (CT) packaging — specify the packaging variant that matches the assembly pick-and-place tooling. For full-reel high-volume runs, TR is the standard; CT is typically used for prototypes or low-quantity board builds.