GB21288-2022

Limits for human exposure to electromagnetic fields emitted by mobile communication terminals

移动通信终端电磁辐射暴露限值

GB 21288-2022 é uma norma nacional chinesa obrigatória vigente: Limits for human exposure to electromagnetic fields emitted by mobile communication terminals. Setor: Eletrônicos. Foco: Segurança de produtos. Entrada em vigor: 1 de jan. de 2024.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to mobile communication terminals operating within the 100kHz to 300 GHz frequency range that are used within 20cm of the human body. It covers devices including mobile phones, cordless phones, satellite mobile terminals, wearable devices, and portable mobile terminals. It is mandatory for all manufacturers producing telecommunication equipment for the Chinese market.

Requisitos técnicos

The standard establishes basic limits for electromagnetic radiation exposure to protect public health and occupational workers. For devices operating up to 6GHz, it specifies limits based on the Specific Absorption Rate (SAR), differentiated between the head/torso and limbs. For higher frequency bands (>6GHz to 300GHz), the requirements shift to limits based on absorbed power density. The standard also introduces the concept of Total Exposure Ratio (TER) to evaluate cumulative exposure effects when devices emit multiple frequencies simultaneously. Manufacturers must ensure their products do not exceed these basic limits under any operating condition.

Métodos de ensaio

While GB 21288-2022 primarily defines the exposure limits rather than specific testing protocols, compliance evaluation involves measuring the local SAR (averaged over a 10g tissue cube for lower frequencies) and the local absorbed power density (averaged over 4cm² or 1cm² surface areas for higher frequencies). Testing must be conducted over a minimum averaging interval of 6 minutes. Specific measurement procedures are typically governed by associated product standards referenced in the manual.

Perguntas frequentes

What products are regulated under GB 21288-2022?

GB 21288-2022 significantly expands the scope from mobile phones to all mobile communication terminals operating within 100kHz to 300GHz that are used within 20cm of the human body. This includes wearable devices, portable terminals, and satellite mobile terminals. It also introduces limits for occupational exposure and higher frequency ranges (>6GHz).

Are there any updates from the previous version of GB 21288?

Yes, it replaces GB 21288-2007. The updated version changes the title to *Limits for human exposure to electromagnetic fields emitted by mobile communication terminals*, broadens the applicable product scope, adds definitions for occupational exposure and absorbed power density, and introduces specific limits for different body parts and higher frequency bands.

How does GB 21288-2022 differ from international standards?

GB 21288-2022 aligns its fundamental limits closely with international guidelines (such as ICNIRP) by utilizing Specific Absorption Rate (SAR) for frequencies up to 6GHz and absorbed power density for frequencies above 6GHz. However, manufacturers must specifically declare compliance with GB 21288-2022 in the product manual to meet Chinese regulatory requirements.

The summary above provides a high-level overview of GB 21288-2022. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21288-2022 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Segurança
CCS: C71
ICS: 13.280
Órgão competente: Ministry of Industry and Information Technology
Comitê técnico: Ministry of Industry and Information Technology

Relações

Substitui:GB 21288-2007