What This Block Is and Where It Goes
The TE Connectivity Buchanan 1-796689-0 is a 10-position PCB-mount terminal block on 0.197" (5.00 mm) pitch. The rising cage clamp accepts 12-30 AWG wire and cinches down with an M3 screw at 0.79 Nm (7.0 Lb-In). The housing is black polyamide (PA66) with an interlocking side feature — you can gang multiple blocks side-by-side on the same rail without losing position alignment. The 35° (145°) wire entry angle keeps the screwdriver and wire clear of adjacent components on a crowded board.
Wiring It: What Fits and How Tight
The screw rising cage clamp grabs solid or stranded wire from 12 AWG down to 30 AWG. Torque the M3 screw to 0.79 Nm (7.0 Lb-In) — that spec is the clamp force that keeps the connection stable under thermal cycling. The contact and clamp are brass, tin-plated; the screw is brass, nickel-plated. Tin on the clamp means this block is built for a few install cycles, not frequent re-termination — the plating work-hardens if you torque and release it repeatedly.
Rated for Power, Not Just Signal
17.5 A per position at 300 V puts this block in the power termination class — think motor leads, heater connections, PSU outputs inside an industrial cabinet. One level, 10 positions; the interlocking side lets you stack another 10-position block adjacent for a 20-circuit run with the same screwdriver and wire range.