What it is and where it sits in the series
The Molex 391002512 is the 12-circuit member of the Eurostyle 39100 series — a dual-row enclosed terminal strip designed for panel and chassis wiring in industrial automation and power distribution applications. It carries a 0.591 in (15.00 mm) pitch, which is the series' larger-grid option; the same series also ships a 0.394 in (10.00 mm) pitch variant rated at 30 A per circuit.
What the ratings mean for the fit
The 63 A per circuit rating at 600 V is the primary selection driver for this part — it puts it squarely into power-distribution territory, not signal-level wiring. The enclosed barrier construction and the PA66 (Nylon 6/6) housing with UL94 V-0 flammability rating mean it is suited for inside-the-enclosure panel wiring where flame resistance is specified. The zinc-plated steel terminal screws accept 6-14 AWG on the top termination side; the bottom termination is closed, which is typical for end-cap chaining but means you cannot route a wire through from below — plan your entry routing accordingly. The -40°C to 105°C operating range covers most industrial enclosure thermal cycles; confirm the derating slope against the product drawing for full-load circuits.