Engineering Guides
EV charger leakage protection and current sensing, explained.
Practical notes from our engineers on DC 6mA detection, charging standards, RCD sensor integration and current sensor selection for EV, BMS and power electronics.
EV charger leakage protection
Type A vs Type B RCD for EV chargers: when is Type A + DC 6mA detection enough?
Why smooth DC leakage blinds a Type A RCD, what the charging standards accept instead of a Type B device, and how charger makers choose between the two architectures.
Read guide →GuideIEC 62955 RDC-DD explained: DC 6mA detection for Mode 3 EV chargers
A plain-language walk through IEC 62955: what an RDC-DD is, the difference between RDC-MD and RDC-PD, how it pairs with a Type A RCD, and how to design it into a wallbox.
Read guide →GuideIEC 62752 IC-CPD: residual current protection for Mode 2 portable EV chargers
What an in-cable control and protection device is, why it must detect both AC and smooth DC residual current, and how compact sensors fit inside a portable charger box.
Read guide →GuideHow 6mA DC residual current detection works: the fluxgate principle explained
A plain engineering explanation of fluxgate sensing: why a normal CT is blind to smooth DC, how a saturating core reveals a few milliamps of DC leakage, and what the self-test does.
Read guide →GuideHow to choose an RCD sensor for a wallbox or EV charger
A step-by-step selection checklist for charger designers: charger mode and market, current and conductor size, aperture, PCB mounting and how much integration you need.
Read guide →GuideBuilt-in RCD sensor vs Type B RCD: cost, space and installation compared
A practical comparison for charger makers and installers: where the cost sits, how much space each option takes, and what you gain from fault reporting and automatic self-test.
Read guide →GuideIntegrating an RCD sensor on a charger PCB: wiring, self-test and common mistakes
Practical layout and firmware notes from our datasheets: power supply, signal interface, self-test timing, placement near relays and the mistakes we see most often in first prototypes.
Read guide →GuideGB/T vs IEC leakage protection requirements for AC EV chargers
A map of the IEC and Chinese GB/T standards that govern residual current protection in AC chargers, what they have in common, and how to design one sensor platform for both markets.
Read guide →Current sensors for EV, BMS and power electronics
How to choose an EV current sensor: BMS, traction drives and charging equipment
Where current is measured in an electric vehicle and its charging equipment, which sensor technology fits each point, and the seven parameters to send your supplier.
Read guide →GuideOpen-loop vs closed-loop Hall current sensors: accuracy, speed, power and cost
How each Hall sensor architecture works, a side-by-side comparison of accuracy, response time, drift, power and size, and a simple rule for choosing between them.
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