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    a Schematic diagram of the BNT-based components constructed based on the entropy-increase strategy. b Digital photograph, cross-sectional SEM image, and EDS mappings of the MLCCs. c Unipolar P-E loops of MLCCs as a function of applied E. d Wrec and η of the MLCCs as a function of applied E. The comparison of (e) Wrec and η, (f) η and UF of the MLCCs with those of other recently reported state-of-the-art MLCCs. source: Nature Communications

    Researchers Proposed Enhanced Energy Storage MLCC

    Littelfuse Releases First Reflow-Compatible Illuminated Tactile Switch

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    Researchers Demonstrated High Energy Ceramic Capacitors Stable in Wide Temperature Range

    Stackpole Offers High Voltage Plate Resistors up to 40KV

    How to Manage Supercapacitors Leakage Current and Self Discharge 

    Qualification of Commercial Supercapacitors for Space Applications

    Experimental Evaluation of Wear Failures in SMD Inductors

    Resonant Capacitors in High-Power Resonant Circuits

    a Schematic diagram of the BNT-based components constructed based on the entropy-increase strategy. b Digital photograph, cross-sectional SEM image, and EDS mappings of the MLCCs. c Unipolar P-E loops of MLCCs as a function of applied E. d Wrec and η of the MLCCs as a function of applied E. The comparison of (e) Wrec and η, (f) η and UF of the MLCCs with those of other recently reported state-of-the-art MLCCs. source: Nature Communications

    Researchers Proposed Enhanced Energy Storage MLCC

    Littelfuse Releases First Reflow-Compatible Illuminated Tactile Switch

    Vishay Unveils 5W Power Metal Strip Resistor in Compact 1206 Case Size

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    Efficient Power Converters: Duty Cycle vs Conduction Losses

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

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YAGEO Releases High-Sensitivity Residual Current Detectors for Safer EV Charging

17.6.2025
Reading Time: 3 mins read
A A

As global electric vehicle (EV) adoption continues to accelerate, YAGEO Group announces the release of its cutting-edge FG-R Series, a fluxgate-based AC and DC leakage current sensor designed to meet stringent international safety regulations and protect end-users.

Optimized for Mode 2 and Mode 3 EV charging systems, as well as onboard charger (OBC) applications, the FG-R Series combines precision, robustness, and compliance in a compact modular package.

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Revolutionizing Residual Current Detection

The FG-R Series is an open-loop fluxgate residual current sensor offering analog leakage current monitoring and independent digital alarms for AC and DC thresholds. Built with AEC-Q certified components to ensure automotive-grade reliability, the FG-R Series is ASIL B capable and RoHS compliant.

Key certifications include:

  • IEC 62752:2016/A1:2018
  • IEC 62955:2018 (RDC-MD)
  • UL 2231-2

With selectable leakage detection thresholds (AC: 20/30 mA, DC: 6 mA), the FG-R Series supports global EVSE regulations while reducing false triggers through precise phase detection and comprehensive self-test routines.

Advanced Functional Capabilities

  • Rated for up to 22 kW / 32 A AC charging
  • Single-phase: up to 80 A | Three-phase: up to 40 A
  • Real-time analog output for combined AC & DC residual current monitoring
  • Independent alarm outputs with open-drain logic for seamless integration
  • Operating temperature up to 105°C
  • Optimized for 50/60 Hz with stability at up to 2 kHz

Designed for Seamless Integration

Available in multiple mechanical versions, including FG-R04 and FG-R14 vertical busbar variants, the FG-R Series supports efficient assembly with:

  • Capacity for up to 4 x 6 mm² cables or busbars (up to 40 A)
  • Modular design to minimize EMI exposure
  • Simplified pinout for analog and digital outputs

Technical Differentiators

The FG-R Series stands out with:

  • Custom driving IC for improved oscillator stability
  • Enhanced phase angle response to reduce nuisance tripping
  • Self-test pin for diagnostic cycling without load interruption
  • Multi-standard certification for global compatibility

Expanding Beyond EVSE: Meeting the Demands of Mobile Energy Hubs

The FG-R Series extends its applications beyond traditional EV charging:

  • Vehicle-to-Load (V2L): Ensures safety for AC outlets powering various appliances directly from EVs.
  • Vehicle-to-Grid (V2G): Supports three-phase power transfer for energy discharge back to homes and grids.

YAGEO is also preparing to launch a new series with full three-phase RCD detection, addressing V2L and V2G needs with enhanced performance and reliability.

Application Tip for IEC62955 Compliance:

Design engineers should note that DC and AC alarms operate independently. However, DC alarms may trigger during high AC leakage (>60 mA). The upcoming FGR1 part series, featuring a newly designed ASIC, will ensure alarm independence without any required delay.

Related

Source: YAGEO

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