MSR05 with SOT-143 is an ESD protective device manufactured by MSKSEMI. It is designed to protect sensitive electronic components from electrostatic discharge (ESD) that can potentially damage them. Features include: Low capacitance of 0.5 pF between I/O lines, low clamping voltage, ultra-low leakage current, high surge current capability of 7A (8/20 us), and self-resetting PPF design. It meets various safety standards such as RoHS, EN60065, UL60950, and many others. It has a variety of applications in communications systems, instrumentation systems, automotive.