The 2834089-3: It uses a screwless leg-spring (push-in spring) termination that accepts solid or ferruled stranded wire from 14-20 AWG — the spring grips the conductor when pushed in, no screwdriver needed. The 0.197" (5.00mm) pitch gives enough spacing for 300 V rated isolation between adjacent circuits on the board, while keeping the block compact enough for a single-level distribution point.
10 A at 300 V — Power Distribution on the PCB
The 14-20 AWG wire range matches the current rating: 14 AWG carries the full 10 A without excessive temperature rise in the PA66 housing, while 20 AWG is fine for lower-current branches. The tin-plated copper contacts are adequate for the rated duty cycle in dry indoor environments; for corrosive atmospheres, the tin surface forms a stable oxide that doesn't increase contact resistance at these current levels.
Side Interlocking and Gang Mounting
The interlocking side feature lets you snap multiple 2834089-3 blocks side-by-side to build a multi-position distribution strip without a separate jumper bar. The kinked through-hole pins provide retention during wave soldering and resist the push-out force from the spring terminal when the wire is inserted.