What the 391002306 is
The Molex 391002306 is the 6-circuit member of the Eurostyle 39100 series enclosed barrier terminal strip family, operating at 0.472" (12.00 mm) pitch with a 40 A per-circuit rating at 300 V. It accepts 8-20 AWG conductors via top-entry screw termination with a closed bottom — a configuration common in panel and chassis-level power distribution blocks where field wiring enters from above and the circuit path is completed through the strip.
Ratings that drive the fit decision
The 40 A per-circuit current rating is the primary selection parameter for power-distribution applications — the enclosed barrier construction keeps live terminals isolated under handling and in service. The 300 V rating sits below the 600 V class of the 12-circuit sibling (0391002012), so verify the system voltage before committing: they share the series and wire-range (8-20 AWG vs 10-18 AWG) but not the voltage envelope. Operating range is -40°C to 105°C with UL94 V-0 rated PA66 (Nylon 6/6) housing — adequate for most industrial enclosure environments without thermal derating concerns at the stated current.