Terminal Strip for Panel-Mount Power Distribution
The Molex 391001902 is a 2-circuit Eurostyle 39100 terminal strip designed for chassis or panel-mount power distribution. It carries a 20 A current rating at 300 V, with a 0.315" (8.00 mm) pitch that provides adequate creepage for the voltage rating without requiring an oversized footprint. The enclosed barrier type and top screw termination suit it for fixed installations where field wiring is terminated with a screwdriver — common in industrial control panels, HVAC equipment, and power supply outputs.
Circuit Count and Sibling Comparison
This 2-circuit version is the smallest position count in the Eurostyle 39100 series. It shares the same 0.315" (8.00 mm) pitch, 20 A rating, 300 V rating, and chassis/panel mounting as the 4-circuit 391001904. The only functional difference is the number of circuits — 2 versus 4 — which means the panel cutout and screw terminal spacing are identical; you can replace a 4-circuit block with two 2-circuit blocks side by side, but a single 2-circuit block does not cover a 4-circuit wiring point without adding a second unit. For BOM matching, confirm the circuit count matches the number of incoming and outgoing conductors.
Top screw termination accepts 12-22 AWG wire — the screw clamps down on the stripped conductor, no crimp terminal required. The bottom termination is closed, meaning the screw terminals are only accessible from the top of the block. Two rows of wire entries (4 total) allow for daisy-chaining or dual-wire termination per circuit. The terminal screw is steel with a zinc finish, providing corrosion resistance in indoor panel environments.