MPE (maximum permissible exposure)

Definition

Maximum permissible exposure is the FCC's limit on external field quantities — electric field strength, magnetic field strength or power density — that a person may be exposed to, averaged over 30 minutes for the general public and 6 minutes for occupational exposure. MPE values are frequency dependent and are derived from the underlying SAR-based restrictions.

Sources

1. fcc-1310 47 CFR § 1.1310 — Radiofrequency radiation exposure limits — U.S. Government Publishing Office (eCFR). regulation, link checked 2026-08-12.
2. fcc-oet65 OET Bulletin 65: Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields — Federal Communications Commission, Office of Engineering and Technology, 1997. government, link checked 2026-08-12.