What this connector is
The Molex 430451021 is the 10-circuit member of the Micro-Fit 3.0 43045 series — a dual-row, right-angle board-to-cable header with a 0.118-inch (3.00 mm) pitch. Square-pin male contacts in a brass body are tin-plated on both the mating face and the solder tail, and the full 10 positions are loaded. The connector uses a board-lock feature and a locking ramp to resist vibration pull-out, and the 4-wall shroud surrounds the contact array on all four sides to prevent mis-mate and protect the contacts in assembly handling.
Key ratings and what they mean
8 A per circuit at 600 V gives this header headroom for power-distribution nodes in the harness — the tin-tin contact system (60.0 µin plating on mating,) handles that current without derating to the degree a gold-flash contact would. The -40 °C to 105 °C operating window covers automotive and industrial environments without a special temperature grade, and the liquid crystal polymer body carries a UL94 V-0 flammability rating for equipment-enclosure use. The 0.290-inch (7.37 mm) insulation height is the dimension that sets the seated profile for any right-angle chassis cut-out or wire routing channel above the board — confirm your enclosure depth clears it before committing the BOM line.
Compliance and sourcing
Confirm the mating half: Micro-Fit 3.0 plug housings accept the corresponding crimp terminal and mate to this header in the locked configuration. The locking ramp pairs with the TPA latch on the housing for two-stage retention.