What This 4-Position Terminal Block Does on the Board
The green polyamide housing (PA66) is the standard Buchanan colour, making it visually distinct from signal-level headers on the same board. Side interlocking features let multiple 796683-4 blocks snap together edge-to-edge to form a continuous multi-position terminal strip without needing a separate end barrier — useful when a design calls for 8, 12, or more positions from a standard building block.
Wire Termination and Torque — What the Clamp Needs
The rising cage clamp accepts wire from 12 AWG down to 30 AWG — an unusually wide range for a single terminal block. A 12 AWG stranded conductor carries the full 17.5 A with margin; a 30 AWG signal wire is held securely by the same clamp, though the current should be derated for the smaller conductor. The M3 screw is brass with nickel plating, and the clamp is brass with nickel plating as well — corrosion-resistant for industrial atmospheres. The recommended torque is 0.79 Nm (7.0 Lb-In); a screwdriver with a blade width matching the screw head (typically a #1 or #2 Pozidriv or slotted, depending on the screw head type — confirm from the product drawing) should be used. Under-torquing leaves the wire loose under vibration; over-torquing can strip the M3 thread in the PA66 housing. The contact material is brass with tin plating, adequate for the current rating and typical indoor environments.
Mounting and Orientation — Where It Sits on the Board
This is a through-hole mount block with a horizontal mating orientation — the wire entry is parallel to the PCB surface (side entry). The 4 positions are arranged in a single level. The 5.00 mm pitch determines the board footprint: four holes on 5.00 mm centres, plus any mounting peg or stabilisation pin holes per the product drawing. No board lock or additional retention feature is listed; the through-hole solder joints provide the mechanical anchor. For high-vibration environments, an additional adhesive or mechanical support may be needed — the screw clamp itself resists vibration loosening better than a spring clamp, but the board-level attachment is only the solder joints.