RCD in EV Charger

Fluxgate-based residual current sensors provide high-accuracy, non-contact measurement of both AC and DC leakage currents for electric vehicle (EV) charging systems and onboard power distribution. In EV charging infrastructure and vehicle applications, detecting residual currents accurately is vital for preventing electrical shock hazards and complying with strict international automotive and industrial safety standards.

Overview

A fluxgate residual current monitoring (RCD) system actively excites a magnetic core and measures its response to external magnetic fields using closed-loop feedback detection. This technology achieves exceptional accuracy, low offset drift, and high thermal stability, making it ideal for detecting complex residual fault currents (smooth DC, pulsating DC, and high-frequency AC components) generated by EV chargers and power electronics.

Provides precise, non-contact measurement of AC and DC leakage currents to protect against electrical faults.

Integrated self-test function and saturation detection.

Supports EV charging stations (EVSE), onboard chargers, and industrial motor drive protections.

Features a multi-pin digital alarm architecture (separate DC and AC alarm flags) alongside standard analog or digital interfaces.

Block Diagram

Featured Products

IST8101

Fluxgate Residual Current Sensor

Superior accuracy for complex AC/DC fault detection

Advanced switching design minimizes electrical offset for reliable signal processing

Features both Analog and I2C digital outputs

View Specs