Mexico NOM is a mandatory national standard – regulated by the Ministry of Economy (SE). Without a valid certificate, goods are detained at customs – and fines apply.

Products with wireless functionality require two separate compliance processes. NOM covers electrical safety – CRT (still commonly called IFT in the industry) covers spectrum access. The two certificates are independent – rules differ – they cannot substitute for each other.

1. Five Steps – From Application to Certificate

1.1 Determine standards and HS codes

Wireless products mainly reference NOM-208-SCFI – a radio‑frequency EMC standard under the NOM system – covering common civilian bands: 902–928 MHz, 2.4 GHz, and 5.8 GHz.

From 1 May 2026, NOM-220-SCFI-2025 takes effect:

·Ordinary Wi‑Fi and Bluetooth (non‑body‑worn) devices – still use NOM‑208.

·Only handheld or body‑worn devices require NOM‑220 – adding SAR testing.

The two standards run in parallel by scenario – NOM‑220 does not replace NOM‑208.

1) HS code rules

For customs clearance, the certificate's HS code must match the customs declaration. The HS code is not printed on the certificate – it's linked via associated filing. Different product categories and wireless functions require different standards – choosing the wrong standard invalidates the entire application.

1.2 Mexico‑based certificate holder

The certificate holder must be a Mexican local entity – with an RFC tax ID. Chinese factories and trading companies cannot directly hold the certificate.

Only local importers, distributors, local brand subsidiaries, or authorised local representatives can be the certificate holder. Many companies wait until goods are near the port – only to find the holder is non‑compliant – rushing to find an agent – missing the shipping deadline.

1.3 Spanish‑language technical documents

Nameplates, manuals, circuit diagrams, and BOMs – all must be in proper Spanish. Machine translation often produces terminology errors – resulting in rejection.

Model numbers, parameters, and brand information must be completely consistent across all documents – any mismatch blocks review. Prepare Spanish templates at the project stage – don't leave translation to the last minute.

1.4 Lab testing

·Safety: local standard NOM-001-SCFI – technically equivalent to IEC 62368-1 – tests insulation, leakage current, earthing, temperature rise – plus EMC radiated/conducted emissions.

·Energy‑efficient products (lighting, power supplies): must also meet standby limits.

NOM safety may use overseas lab reports from EMA‑recognised labs. CRT RF testing is mostly local – but RF reports from US MRA‑recognised labs are also accepted.

·Battery compliance: NOM‑001, NOM‑212 + UN38.3.

·Built‑in non‑removable batteries: no separate NOM‑212 – only separately sold batteries need it.

There is no NOM‑021 standard.

1) Don't blindly send samples

Safety testing can be done at domestic EMA‑recognised labs – saving sample shipping. For RF, confirm lab accreditation and scheduling in advance.

1.5 Review and certification

-NOM certificates are issued by ANCE or NYCE

·ANCE: focuses on appliances and lighting.

·NYCE: more IT and wireless products.

-CRT: final review by the federal telecom authority – testing and report review are timed separately – filing alone takes about 2 weeks.

The two certificates are independent. NOM marks and certificate numbers on the product must be placed correctly – incorrect labelling triggers customs inspection holds.

  2. Certification Modes and Validity

·M1 (no factory audit): valid for 1 year – annual surveillance sampling and key‑item checks – no full retesting – suitable for simple, low‑risk products.

·M2 (with system audit): valid for 3 years – annual surveillance – suitable for long‑term stable mass‑production exports.

SDoC scope is narrow: SDoC self‑declaration is only available for a very small number of passive components on the SE exemption list. Ordinary electronic accessories cannot use it – most products still require third‑party testing.

  3. Timeline and Grid Details

·M1 new safety projects: typically 8–12 weeks.

·M2: longer – due to the factory‑system audit.

·CRT RF: separate scheduling – run both in parallel to compress overall time.

Early finalisation of documents, standard confirmation, and lab booking is critical.

Mexico mains: 127V/60Hz – 220V is only for industrial split‑phase – not 50Hz. Plugs: NEMA 1‑15, 5‑15 – with additional plug‑force and polarity requirements.

  4. Dual‑Certification Parallelism

Prepare documents for both certifications simultaneously – never run them serially. Doing safety first then RF doubles the overall timeline. Align standard selection, Spanish documents, and lab scheduling together – run reviews and reports in parallel.

  5. Practical Recommendations

BlueAsia can handle NOM safety and IFT/CRT projects end‑to‑end – including standard selection, Spanish‑language documentation, lab liaison, and certificate‑holder coordination. We recommend getting compliance assessment involved at the module‑selection stage – far more reliable than last‑minute fixes. Multi‑band wireless whole products require upfront project scheduling.

  6. Common Misconceptions

·Do not use CE reports to substitute for NOM – Mexico does not accept CE exemption – only basic data may be reused – local differences must still be supplemented.

·Overseas factories cannot directly hold certificates – a local RFC entity is a hard requirement.

·Products in the energy‑efficiency catalogue: prepare corresponding documents early – don't wait until customs clearance.

·Getting the certificate is not the end – annual surveillance and market audits are ongoing compliance obligations.

For Mexico NOM certification, contact BlueAsia at 13534225140 (King) or email king.guo@cblueasia.com.