The Molex Eurostyle 39100 391002212 is a 12-circuit enclosed barrier terminal strip designed for panel-mounted power distribution. It carries a 40 A per-circuit rating at 600 V, with the 0.472" (12.00 mm) pitch providing the creepage distance that rating demands — the screw spacing is wide enough to land 8 AWG without the insulation crowding adjacent terminals.
Each of the 12 circuits has two wire entries (24 total), so you can land a feed and a daisy-chain take-off under the same screw without a separate jumper. The 8-20 AWG wire range accepts the heavy conductors that 40 A demands; the zinc-plated steel screws close the connection with a closed bottom termination that prevents wire poke-through behind the panel. The chassis/panel mount means you drill the mounting holes — there is no DIN rail clip, so the panel cutout pattern needs to be laid out before assembly.
The 391002209 is the 9-circuit version at the same 0.472" (12.00 mm) pitch, same 40 A and 600 V rating, same white PA66 body and chassis/panel mount. The only functional difference is circuit count — 9 circuits against 12 — so the panel cutout pattern for the mounting ears is identical, and the wire range (8-20 AWG) and screw finish are shared. If the BOM calls for 9 positions, the 391002209 drops into the same enclosure layout without rewiring the mounting holes.