Sizing the PCB Footprint and Wire Connection
The TE Buchanan Termi-Blok 2383942-7 is a 7-position, single-level PCB terminal block on a 0.138" (3.50 mm) pitch — a standard European spacing that keeps the board footprint compact for a 7-circuit power or signal interface. Each position uses a screw-actuated rising cage clamp that accepts 18-28 AWG solid or stranded wire, terminated by tightening the M2 screw to 0.5-0.6 Nm (4.4-5.3 Lb-In). The block is surface-mount, so the reflow profile and pad layout must accommodate the nylon PA housing and the copper-alloy, nickel-tin plated contacts.
What the 12 A and 300 V Ratings Mean for the Circuit
The 12 A per-position rating is the continuous current each screw-clamp circuit can carry at the full 300 V potential — that is bus-level current for a terminal block this size, not a signal-level trace. The 300 V rating gives enough headroom for 240 VAC line-to-neutral or 48 VDC power distribution in an industrial cabinet. The M2 screw torque of 0.5-0.6 Nm is the field-install number: under-torque leaves a high-resistance connection that heats under load; over-torque strips the copper-alloy threads or cracks the housing.