An apparatus includes a substrate, a first conductive pad and a second conductive pad, both disposed on the substrate, an electrically conductive trace, and a fusible alloy layer. The electrically conductive trace is laid out between the first and second pads, and is configured to conduct electrical current between the first and second pads, and has a serpentine pattern having multiple bends. The fusible alloy layer is disposed on the first pad and over a portion of the trace including no more than a predefined number of the bends.