What This Terminal Block Does on the Board
The TE Connectivity Buchanan 1546073-6 is a 6-position, single-level PCB-mount terminal block with a 0.200" (5.08mm) pitch. It accepts 12-30 AWG wire into a screw-actuated rising cage clamp — the M3 screw tightens to 0.79 Nm (7.0 Lb-In), clamping the wire against a nickel-plated brass cage for a gas-tight, vibration-resistant termination.
The 17.5 A current rating at 300 V is a solid power-level spec for a 5.08mm-pitch block — the 12 AWG upper wire gauge supports that current without excessive voltage drop. The rising cage clamp termination, combined with the brass-nickel-plated clamp and screw, provides consistent clamping force across the full wire range; the 0.79 Nm torque spec is the figure to hit with a calibrated driver to avoid stripping the M3 screw in the nylon housing. Side interlocking allows ganging multiple 1546073-6 blocks side-by-side without extra brackets, useful when you need more than six positions on a common bus.