8-Position PCB Terminal Block, 3.50 mm Pitch
The TE Connectivity Buchanan 284391-8 is an 8-position, single-level PCB terminal block with a 3.50 mm pitch, designed for wire-to-board termination in control and power distribution assemblies. It uses a screw - rising cage clamp termination, accepting wire from 14-30 AWG, and is rated for 12 A at 300 V. The green polyamide (PA66) housing provides a visible color code for circuit identification in multi-block layouts.
Side-Entry Wire Orientation and Interlocking
The mating orientation is horizontal with the board, meaning wires enter from the side parallel to the PCB surface — a space-saving arrangement when the board sits against a panel or enclosure wall. The interlocking (side) feature allows multiple 284391-8 blocks to be ganged together side-by-side, forming a continuous multi-position terminal strip without a separate jumper bar. This reduces assembly hardware and keeps the wiring plane flat.
Termination and Hardware Specs
Each position uses an M3 screw with a specified torque of 0.25 Nm (2.2 Lb-In). The rising cage clamp — brass with nickel plating — pulls the wire against the current bar as the screw tightens, providing a gas-tight connection that resists thermal cycling. Both the screw and clamp are brass with nickel plating; the contact material is brass with tin plating, a combination that suits the 12 A rating in dry indoor environments.