Do You Need FCC Certification?

The short answer

If your electronic product will be marketed or sold in the United States, it almost certainly needs some form of FCC authorization. The question is which type: Certification (FCC ID required, reviewed by a TCB) or Supplier's Declaration of Conformity (SDoC, self-declared, no FCC ID). A small number of devices are exempt entirely.

All of this is governed by 47 CFR Part 2, Subpart J and Part 15.

Two authorization paths

The FCC has two equipment authorization procedures. The old "Verification" and "Declaration of Conformity" paths were consolidated into SDoC in 2017.

Intentional vs unintentional radiators

This is the core distinction that determines your authorization path. Per 47 CFR 15.3:

Intentional radiator: A device that deliberately generates and emits RF energy by radiation or induction. Examples: WiFi routers, Bluetooth speakers, LoRa gateways, cellular modems, garage door openers, key fobs, wireless microphones.

Unintentional radiator: A device that generates RF energy for internal use but does not intentionally emit it. The emissions are a byproduct of the device's operation. Examples: computers, monitors, LED drivers, USB hubs, power supplies, motor controllers.

The distinction is about intent, not about whether RF escapes the device. Every digital device emits some RF. The question is whether your design deliberately radiates RF as part of its core function.

Step-by-step decision process

Step 1: Does your product contain any electronic circuitry?

If no -- purely mechanical products, passive cables, simple resistive loads -- FCC authorization does not apply. You can stop here.

If yes -- proceed to Step 2.

Step 2: Does your product intentionally transmit RF energy?

Check whether any component in your design deliberately generates and radiates or conducts RF. This includes:

• WiFi (802.11a/b/g/n/ac/ax/be)
• Bluetooth (Classic or BLE)
• Cellular (LTE, 5G, NB-IoT, LTE-M)
• LoRa, Zigbee, Z-Wave, Thread
• NFC (at certain power levels)
• UHF/VHF radio
• Radar, lidar with RF components
• ISM band transmitters (Part 18)
• Any custom RF transmitter

If yes -- your product is an intentional radiator. Proceed to Step 3.

If no -- your product is an unintentional radiator. Skip to Step 4.

Step 3: Is the intentional radiator using a pre-certified module?

If your product uses a module (like ESP32-WROOM, nRF52840, QCA6174A) that already holds its own FCC ID:

• The module's FCC ID covers the intentional radio emissions
• Your host product needs Part 15B unintentional emissions testing only
• Authorization path: SDoC for the host (no new FCC ID needed)
• This is the most common path for IoT and smart home devices
• See our Pre-Certified Modules guide for requirements

If your product uses a custom RF design (chip-down, no pre-certified module):

• You need full Certification (FCC ID required)
• Testing covers both intentional radio parameters and unintentional emissions
• Must test at an FCC-recognized lab and file through a TCB
• Cost: $8,000 -- $20,000+

Step 4: Determine SDoC requirements for unintentional radiators

Your product needs Part 15 Subpart B testing for radiated and conducted emissions. You self-declare compliance (SDoC) after testing passes. No TCB review, no FCC ID, no government filing fee.

Testing must be performed at a lab accredited under ISO/IEC 17025 by a recognized accreditation body (A2LA, NVLAP, or equivalent).

Cost: $800 -- $5,000 depending on device complexity.

Step 5: Check for exemptions

Some devices are exempt from equipment authorization entirely per 47 CFR 15.103:

• Digital devices operating below 1.705 MHz that do not use digital techniques to generate RF above 1.705 MHz
• Devices with power consumption under certain thresholds (varies by device class)
• Joule-effect industrial heaters and certain other Part 18 equipment
• Devices operated by the US government (but not government contractors)
• Test equipment used solely for testing and not marketed to end users

Exemptions are narrow. If you are building a consumer electronics product, assume you need authorization. The cost of getting it wrong (FCC enforcement, product recall, customs seizure) far exceeds the cost of testing.

Common scenarios

What about SDoC recordkeeping?

Even though SDoC has no public filing, you are required to:

1. Keep all test reports on file and available for FCC inspection
2. Include the required FCC compliance statement in your user manual
3. Label your product with the required Part 15 compliance text
4. Ensure production units match the tested configuration

The FCC can request your SDoC documentation at any time. Customs and Border Protection can also request proof of FCC compliance at import. Having your SDoC test report readily accessible avoids delays at the border.

When modifications require re-authorization

Once your product is authorized, changes may trigger re-testing:

• Class I permissive change: Minor modifications (cosmetic changes, component substitutions with equivalent specs) -- no TCB review needed, update records only
• Class II permissive change: Modifications affecting emissions (antenna change, frequency band addition, power level change) -- requires TCB review, may require partial retesting. Fee: $500 -- $1,500
• Full recertification: Fundamental changes to the RF design -- new FCC ID required, full testing cycle

Per 47 CFR 2.1043, any change that could affect emissions characteristics requires at minimum a permissive change evaluation. When in doubt, your TCB can advise on classification.

The cost of skipping FCC authorization

Marketing an unauthorized device in the US violates 47 USC 302a. Consequences include:

• FCC enforcement action: Warning letters, citations, fines up to $100,000+ per violation
• Customs seizure: CBP can impound shipments lacking proof of FCC authorization
• Retailer requirements: Amazon, Best Buy, Target, and most major retailers require proof of FCC compliance before listing
• Liability exposure: If your device causes interference, you are liable for remediation costs

The minimum cost of proper SDoC testing ($800 -- $2,000) is trivial compared to any of these outcomes.