ANATEL Tightens EMC for DC Fast Chargers in Brazil

Brazil’s National Telecommunications Agency (ANATEL) has introduced stricter electromagnetic compatibility (EMC) requirements for DC fast charging equipment entering the Brazilian market — a development with direct implications for power electronics manufacturers, EV infrastructure exporters, and certification service providers active in Latin America.

Event Overview

On May 3, 2026, ANATEL issued Technical Notice No. 782, mandating that all DC fast charging equipment — including modules, charging stations, and liquid-cooled units — comply with IEC 61000-4-20:2026 Class H conducted immunity testing effective June 1, 2026. This replaces the previous Class F requirement and increases interference immunity margin by a factor of three. Non-compliant products will be ineligible for ANATEL certification and prohibited from sale in Brazil.

Industries Affected by Segment

Direct Exporters of DC Fast Charging Equipment

Exporters supplying DC fast chargers or subsystems to Brazil face immediate compliance pressure. Because ANATEL certification is mandatory for market access, failure to meet the new Class H test requirement halts product registration and clearance. Impact manifests in delayed shipments, retesting costs, and potential redesign cycles for legacy models certified under older standards.

Power Electronics Module Suppliers

Suppliers of core components — such as AC/DC front-ends, DC/DC converters, and control boards — are affected indirectly but critically. Many OEMs source these modules pre-certified; however, Class H immunity requires system-level design considerations (e.g., filter topology, grounding layout, coupling path mitigation). Suppliers must verify whether their existing module-level certifications remain valid under the updated system-level test condition.

Certification and Testing Service Providers

Laboratories accredited for ANATEL certification must now implement IEC 61000-4-20:2026 Class H test capabilities — including specialized current injection probes, calibrated coupling networks, and validated test setups. Capacity constraints and lead time extensions are expected during the initial rollout phase, particularly for labs outside Brazil without prior Class H experience.

EV Infrastructure Integrators and System Builders

Companies assembling complete charging systems (e.g., combining third-party modules with custom enclosures, cooling, and software) bear full responsibility for final system-level compliance. The new rule shifts emphasis from component-level conformity to integrated immunity performance — meaning even previously certified subassemblies may require re-evaluation when combined into new mechanical or electrical configurations.

Key Focus Areas and Recommended Actions

Monitor official ANATEL guidance on transition timelines and grandfathering provisions

While Technical Notice No. 782 states enforcement begins June 1, 2026, ANATEL may issue clarifications on transitional arrangements — e.g., whether pending applications submitted before June 1 can proceed under prior rules. Stakeholders should track updates via ANATEL’s official portal and registered notifications.

Prioritize testing for high-volume SKUs destined for Brazil

Given limited lab capacity and extended turnaround times anticipated for Class H testing, companies should identify top-selling or strategically critical models for early submission. This avoids bottlenecks ahead of the deadline and supports continuity of supply.

Distinguish between regulatory signal and operational readiness

The introduction of Class H reflects ANATEL’s broader alignment with evolving global EMC expectations — not just a one-off tightening. However, actual enforcement rigor (e.g., sampling frequency, post-market surveillance scope) remains to be observed. Businesses should treat this as a binding requirement while acknowledging implementation maturity may vary in early months.

Initiate internal cross-functional alignment on design and procurement impacts

Engineering, procurement, and regulatory affairs teams should jointly review BOMs and schematics for affected products. Particular attention is needed for passive filtering components, PCB stack-up, cable shielding, and grounding schemes — all of which influence Class H performance. Early engagement with suppliers on material and layout changes is advisable.

Editorial Perspective / Industry Observation

Observably, this update signals ANATEL’s intent to strengthen resilience of Brazil’s growing EV charging infrastructure against real-world electromagnetic disturbances — especially in industrial or urban grid environments where conducted noise is prevalent. Analysis shows it is less a sudden departure than a calibrated escalation: IEC 61000-4-20:2026 itself was published only recently, and Class H represents the highest immunity level defined in that standard. From an industry perspective, this is best understood not as an isolated compliance hurdle, but as an indicator of tightening technical harmonization across emerging EV markets — where electromagnetic robustness is increasingly treated as foundational, not optional.

Current observation suggests this is already a binding regulatory outcome (not merely a signal), given its inclusion in an enforceable technical notice with a fixed effective date. Yet sustained attention remains warranted: future adjustments — such as expansion to radiated immunity clauses or inclusion of functional safety interfaces — could follow as the standard matures.

Conclusively, the ANATEL update underscores that EMC compliance for DC fast charging is evolving from a checkbox exercise toward a system-integrated engineering discipline. For stakeholders, it is more accurate to interpret this not as a short-term certification challenge, but as a structural shift in how electromagnetic resilience is specified, verified, and valued across the EV charging value chain in regulated markets.

Source: ANATEL Technical Notice No. 782, published May 3, 2026. Pending clarification on transitional provisions remains under observation.