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Home Support FAQ

How to protect against EFT (Electrical Fast Pulse) in intelligent low-voltage monitoring units?

Time：2026-01-20 Views：510次
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EFT (Electronic Fast Pulse) protection requires a low-inductance path and high-frequency filtering.

Power input: CMZ3225A-501T common-mode inductor (500μH) in parallel with a CY-Y1-222K Y capacitor (2.2nF).

Signal port: PBZ1608E600Z0T ferrite bead (600Ω@100MHz) in series, ESD5V0D8B in parallel.

PCB design: Power and ground planes are tightly coupled.

Grounding system: Star grounding.

This protection passes IEC 61000-4-4 Level 3 testing (power port 2kV, signal port 1kV).

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