FCC SAR Testing

On April 2, 2025, the fcc released guidance on 47 CFR Part 2.1093for portable device RF exposure (SAR, PD, EMF, etc.) testing, referencing key documents such as KDB 447498, KDB 616217, and KDB 648474.

Key Change: Test Distance reduced

Body RF Exposure Test Distance:

- Previous Standard:Body test distance for devices like mobile phones was 15mm.

- New RegULation:All portable devices (phones, tablets, laptops, etc.) must have a test distance of ≤5mm, unless the device is equipped with an FCC-recognized inherent accessory(e.g., stand or fixed structure).

- Note:Test distance for Hotspot moderemains 10mm.

Inherent Accessory Compliance Requirements

- Size Limit:Height ≤ 25mm, must be clearly indicated in certification documents.

- Document Declaration:User manuals must state that the accessory has passed fcc testing, and may involve KDB Inquiry procedures(e.g., KDB 447498).

- Design Tip:The accessory must be built-inand non-removable(e.g., a phone stand must be integrated with the device body).

Affected Products

- Key Categories:Laptops, mobile phones, tablets, handheld devices, etc.

- Certified Products:

- Products not yet certified must undergo re-testing according to the new standard.

- Products already on the market that undergo design changes must be re-tested.

Testing Notes

1. Hotspot modeand Body-Worn modeSAR data cannot be shaRED, which may increase test time.

2. Canada ised Standard (RSS-102 Issue 6)allows Body test distance of 10mm. For dual FCC + ised certification, separate tests are required or adopt 5mmfor both.

3. Reduced test distance may lead to RF exceedance. Early design compliance evaluation is recommended.

Compliance Recommendations for Companies

1. Conduct a 5mm test reviewimmediately, focusing on devices without fixed protective structures to eliminate potential compliance risks.

2. Consult certification bodies: Communicate the test plan in advance to avoid market delays due to re-testing.

3. Update documentation: Ensure user manuals and certification documents clearly indicate information about inherent accessories.