A current sensor, also known as a current transformer, is a device used to detect the magnitude of current in a circuit. Current sensors are commonly used in AC circuits to isolate high-voltage circuits from low-level circuits, achieving the goal of safe isolation. They are widely used in various fields, including wind energy generation, the electronics industry, water meters, and information recording. Their outstanding characteristics include low power consumption, small size, and the ability to be intelligent and modular integrated in certain applications. In specific sectors such as the automotive electronics industry, there is a high demand for current sensors that have strong anti-interference capabilities and good temperature stability to adapt to various harsh working environments. The specific parameters of current sensors may vary depending on the model and application scenario, but usually include voltage measurement range, measurement accuracy, linear error, response time, and isolation voltage. Current sensors are indispensable tools for testing, measurement, and control in fields such as power, electronics, and communication, providing important technical support for the safe and stable operation of equipment in these fields.