Low Loss ASML0402 The product series is an ultra-low internal resistance, ultra-small packaging of self-recovery fuse, specially designed to protect bluetooth headset, smart bracelet and other wearable devices from short-circuit overcurrent damage protection components. This kind of wearable devices have small internal spatial structure and high density of components, which have high requirements for circuit design. The ultra-low internal resistance product series launched by Competitive Wo Electronics has the packaging size as low as 0402, which is the minimum packaging size of low resistance value PPTC products. It is especially suitable for the electronic product application design of high-density structure space. Compared with the conventional patch, Low Loss ASML0402 product series internal resistance is very small, with small circuit loss, which solves the very difficult problem of circuit pressure drop and loss for engineers.