12-Position PCB Terminal Block with 5.08 mm Pitch
The TE Connectivity Buchanan 1-796949-2 is a 12-position, single-level PCB terminal block from the Buchanan series. It uses a screw - rising cage clamp wire termination, accepting 12-30 AWG wire, and is rated for 17.5 A at 300 V. The mating orientation is horizontal with the board, meaning the wire entry is parallel to the PCB surface — a common arrangement for terminal blocks on the edge of a control board where wires dress out sideways. The black polyamide (PA66) housing carries an interlocking side feature, allowing multiple blocks to be ganged together into a longer strip without extra hardware.
Wire Termination and Torque Specs for the Build
The rising cage clamp mechanism pulls the wire up against a nickel-plated brass clamp plate as the M3 screw is tightened. The recommended torque is 0.79 Nm (7.0 Lb-In) — exceeding this can strip the threads in the PA66 housing or deform the clamp. The clamp and screw are both brass with nickel plating, providing corrosion resistance in industrial cabinet environments. Contact material is brass with tin plating, which is standard for screw-clamp terminal blocks where the connection is maintained by clamping force rather than repeated mating cycles. The 12-30 AWG range covers most panel wiring from heavy power feeds (12 AWG) down to signal-level control wiring (30 AWG).