What it is and where it sits in the Eurostyle 39100 series
The Molex 391001902 is the 2-circuit member of the Eurostyle 39100 series — an enclosed barrier terminal strip sized for chassis and panel wiring in industrial control and automation equipment (K*). The 0.315 inch (8.00mm) pitch separates the two rows, and each circuit is rated 20 A at 300 V — solid panel-power territory for a 12-22 AWG wire gauge. The top termination uses screws; the bottom is closed. With 4 wire entries across 2 rows, it accommodates a field wiring run and a bus link without extra hardware.