11-Position SMD Terminal Block at 3.81 mm Pitch
The TE Connectivity Buchanan Termi-Blok 1-2383941-1 is an 11-position, single-level terminal block with a 0.150" (3.81 mm) pitch, designed for surface-mount assembly. It accepts 18-28 AWG wire terminated via a screw-rising cage clamp — the M2 screw drives a nickel-plated copper clamp that pulls the conductor against the current bar. The 3.81 mm pitch is the board-layout anchor: it sets the pad spacing and determines how much clearance you have for traces between adjacent positions on the PCB. At 7 A per circuit and 300 V, this block suits low-to-moderate power distribution and signal-level field wiring in industrial controls, instrumentation, and building automation where a reflow-compatible SMD footprint is preferred over a through-hole solder joint.
What the 7 A Rating and Screw Clamp Mean for the Build
The screw-rising cage clamp delivers a gas-tight connection on solid or stranded wire; the specified torque range of 0.5-0.6 Nm (4.4-5.3 Lb-In) is tight enough to prevent cold flow creep in the conductor but low enough to avoid stripping the M2 thread in the nickel-plated copper alloy screw. The clamp and screw are both copper alloy with nickel plating, which resists corrosion in humid cabinet environments. The contact itself is copper alloy with nickel-tin plating — tin is the working surface for the wire termination, not a high-cycle mating interface, so this block is intended for semi-permanent field wiring, not repeated disconnect/reconnect duty.
SMD Mounting and Board Guide
Surface-mount termination means this block goes through the reflow oven with the rest of the SMD components — no secondary wave-solder pass. The board guide feature (a molded alignment post on the underside) locates the part during pick-and-place and keeps it from shifting during reflow. Tape & Reel packaging (cut tape available) feeds directly into an SMD line. The mating orientation is horizontal with the board — wires enter parallel to the PCB plane, which keeps the overall height low and suits enclosures where vertical clearance above the board is tight.