12-Circuit Barrier Strip at 0.315-Inch Pitch
The 391001912: Wire entry accepts 12–22 AWG via the screw head — top-entry screws with a zinc finish on the steel screw pull the conductor down against a brass-style terminal saddle. The bottom is closed, which means you route the wire in from the top only and the closed base keeps debris and any fluid splash from tracking between adjacent circuits. Two rows of four wire entries gives 24 entry points across the 12 circuits, so each circuit carries one wire per row face — standard dual-row buss topology. The PA66 nylon body carries a UL94 V-0 flammability rating and an operating range of −40°C to 105°C — broad enough for industrial enclosure environments where a terminal strip might see both cold-start and heated-cabinet conditions. The enclosed barrier construction gives spacing or it'll track — the solid wall between adjacent circuits keeps the path longer than an open-deck barrier would.