Blackburn SWC235A1406 STD FLEX BRAID 4H NEMA 406MM LONG

It's a flexible braided shunt connector used to carry current between two rigid points that move or need isolation from vibration, such as switchgear, disconnects, bus connections and transformer terminations. The braid is flat tin-plated copper, so it flexes repeatedly without the fatigue cracking you get from solid bar, and the tin plating helps at bolted contact surfaces. Four bolt holes, two per pad, and the braid measures 406 mm long.

The SWC235A1406 is built to IEEE / ANSI C37 and 34, the standards families covering switchgear and high-voltage air switch apparatus. That's the reference to cite on a substation or switchgear submittal. It is also made in the United States, which matters where domestic-content sourcing is a contract requirement.

Four-hole means each end pad is drilled with two bolt holes rather than one, giving four total across the connector. Two bolts per pad resist rotation and spread clamping force over the contact area, which is what NEMA-drilled switchgear and bus pads are built for. If your existing terminal pad only has a single bolt hole per side, this won't land on it and you want a 2-hole braid instead. Match the drilling and the hole spacing on the pad you're bolting to before ordering.

Tin plating on the copper braid slows oxidation at the bolted contact faces, which is where resistance and heating show up first on a shunt. Bare copper oxidizes and the joint degrades, especially outdoors or in humid switchyards. Tin-plated also pairs safely with aluminum bus without the galvanic issue you get from bare copper on aluminum.

Blackburn SWC235A1406 is the manufacturer part number, and it's the number to put on the purchase order or the submittal. The SWC prefix runs across the standard flexible braid line, with the trailing digits identifying the length, so 1406 corresponds to the 406 mm braid.

Flat braid is the usual choice where the connection has to flex in one plane and sit in a tight gap between pads. The flat profile gives more surface area for heat shedding, lies against the pad cleanly, and the woven strands take repeated flexing from switch operation and thermal cycling. The SWC235A1406 is a flat flexible braid on both counts. A round flexible jumper is the better pick when movement happens in several directions or the run has to bend around obstructions.

Sold each, one braid per unit. If you are shunting a three-phase switch or replacing a full set, order the quantity you need per pole rather than expecting a set in one box.