ESD Protection for China-Sourced Electronics
1 resources tagged with "Esd"
ESD (electrostatic discharge) is a top cause of latent field failures in electronics, and it gets controlled at both the circuit and factory-floor level when sourcing from China. Designs are validated against HBM and CDM models with TVS diodes at exposed ports, and immunity is tested to IEC 61000-4-2 — commonly ±4kV contact and ±8kV air discharge for consumer gear. The recurring problem is a board that passes lab ESD testing but is then assembled on a line with no wrist straps or ionizers, undoing the protection during production.
ESD protection pairs circuit design (TVS diodes, grounding, layout) with factory handling controls (wrist straps, ionizers, ESD flooring). The pitfall in sourcing is verifying only the design and not the production line; ESD equipment is often present but switched off or untested.
Wiki (1)
FAQ
What ESD test do electronics need for CE?
IEC 61000-4-2 is the ESD immunity standard under the EMC Directive. Typical pass levels are ±4kV contact and ±8kV air discharge, with stricter requirements for industrial and medical equipment.
How do I confirm a factory line is ESD-safe?
Request surface-resistance test logs, photos of wrist-strap testers and ionizers in active use, and ESD flooring certification. During audits we measure bench resistance and check that operators are actually grounded, since the gear is frequently present but unused.
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