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FCC Part 15 Guide: Testing & Certification

In July 2026, the FCC fined eight companies $25,000 each for failing to respond to inquiries about imported wireless devices. The same month, an FCC enforcement notice detailed how a modified handheld radio caused harmful interference to a county's 911 emergency communications channel. Non-compliance with Part 15 is not theoretical — the FCC investigates and fines regularly.

A company recently shipped 5,000 units of a smart home device to a US distributor. The shipment was held at customs because their FCC Supplier's Declaration of Conformity referenced the wrong test standard. That mistake cost them two weeks and $12,000 in storage fees.

FCC Part 15 is mandatory federal law enforced by the FCC, and it applies to virtually every product containing digital circuitry — from a simple microcontroller to the most advanced wireless device. We process FCC declarations for hundreds of electronics clients on the Sustalium platform, and the most common mistakes are almost always avoidable. Here is exactly what you need to know.

What Is FCC Part 15?

FCC Part 15 (Title 47 CFR Part 15) is the section of US federal regulations governing unlicensed radio frequency (RF) emissions. It applies to any device that generates, uses, or emits RF energy — which, in practice, means nearly every electronic product.

The regulation's core purpose is simple: your device must not cause harmful interference to licensed radio services (like cellular networks, broadcast television, or aviation radar), and it must accept any interference it receives, even if that interference disrupts its own operation.

Part 15 divides devices into two fundamental categories, and which one your product falls into determines your compliance path:

Intentional Radiators

An intentional radiator deliberately generates and emits RF energy for communication or sensing purposes. Examples include: - Wi-Fi routers and modules (2.4 GHz, 5 GHz, 6 GHz) - Bluetooth devices (headphones, speakers, wearables) - Zigbee and Thread smart home devices - RFID readers and NFC transmitters - Radar sensors and mmWave devices - Cellular modules (LTE, 5G — though these may also require separate FCC equipment authorization)

Intentional radiators require FCC Certification, which involves testing at an FCC-accredited laboratory and filing with the FCC's equipment authorization system.

Unintentional Radiators

An unintentional radiator does not deliberately transmit RF energy but generates digital signals that can produce RF emissions as a byproduct. Nearly every product with a microprocessor, clock oscillator, or switching power supply falls into this category. Examples include: - LED lighting fixtures and drivers - Power adapters and USB chargers - Industrial motor controllers and variable frequency drives - Consumer electronics (TVs, computer monitors, coffee makers with digital displays) - Wired networking equipment (Ethernet switches, routers without Wi-Fi) - Any device with a microcontroller or digital clock above 9 kHz

Unintentional radiators require either FCC Certification (for most devices), an FCC Supplier's Declaration of Conformity (SDoC) (for certain device classes), or FCC Verification (for legacy device types).

The Three Compliance Paths

1. FCC Certification (Most Common)

Required for all intentional radiators and most unintentional radiators. The process involves: - Testing at an FCC-accredited Telecommunications Certification Body (TCB) or test laboratory. - Measurement of radiated and conducted emissions against Part 15 limits. - Submission of test reports and application to the FCC via the Equipment Authorization System. - Issuance of an FCC ID, which must be permanently affixed to the product label.

FCC ID format: FCC ID: XXX123456789 Where XXX is the Grantee Code assigned to your company and the remaining characters are your product-specific identifier.

2. Supplier's Declaration of Conformity (SDoC)

Available for certain classes of unintentional radiators, including: - Personal computers and peripherals. - Television and radio broadcast receivers. - Cable system terminal devices.

Under SDoC, you self-declare compliance based on testing performed by an accredited laboratory. No FCC filing is required, but you must maintain a complete compliance folder including test reports, product description, and the responsible party's US contact information.

3. Verification (Legacy)

The original, least formal path, still applicable to certain legacy device types (like some industrial equipment). Involves self-testing and self-declaration without mandatory accredited lab involvement or FCC filing. However, most new products have been migrated to Certification or SDoC, making Verification increasingly rare in practice.

FCC Part 15 Labeling Requirements

Every compliant device must display specific labeling information:

Requirement Intentional Radiator Unintentional Radiator (SDoC)
FCC ID Required on product label Not applicable
FCC Compliance Statement Not required if FCC ID present Required: "This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation."
Responsible Party Grantee name and contact on file Name, address, and contact of US responsible party must be in user manual and compliance folder

If the device is too small for a physical label (e.g., a tiny IoT module), the FCC ID may be placed in the user manual and on the packaging, with a reference on the device directing the user to those locations.

The Amazon Enforcement Trap

Amazon US actively enforces FCC compliance on its marketplace. If your electronic product is flagged — either through an FCC market surveillance action or a competitor complaint — Amazon will immediately request your FCC ID or SDoC documentation. If you cannot provide it within a narrow window, your listing will be permanently removed and your FBA inventory frozen. This happens thousands of times per year, often targeting smaller brands that were unaware of FCC requirements.

FCC Part 15 vs. EU CE Mark (EMC Directive)

Many manufacturers assume that passing CE Mark EMC testing (under the EU EMC Directive 2014/30/EU) means their product is automatically FCC compliant. This is incorrect:

Aspect EU CE Mark (EMC) US FCC Part 15
Emissions limits EN 55032 / EN 55035 FCC Part 15 Subpart B
Frequency range 150 kHz – 6 GHz 9 kHz – 40 GHz (device-dependent)
Test methodology CISPR standards ANSI C63.4
Authorization Self-declaration (DoC) Certification or SDoC
Labeling CE Mark FCC ID or compliance statement

While the test methodologies are similar, the specific limits, measurement procedures, and reporting formats differ. You must test separately for FCC compliance — a CE test report will not satisfy the FCC.

How Sustalium Simplifies FCC Compliance

Managing FCC certifications and SDoCs across multiple product SKUs, tracking renewal dates, and providing documentation to retailers is a logistical burden. Sustalium's FCC Part 15 compliance platform centralizes and automates this workflow.

  • FCC Compliance Document Generator: Upload your FCC test reports, FCC ID details, and responsible party information. Sustalium generates a structured, audit-ready FCC Declaration of Conformity and compliance dossier.
  • Retailer-Ready Verification Pages: Amazon and major retailers increasingly demand verifiable compliance proof. Sustalium generates a public URL displaying your FCC ID, test report summaries, and compliance status — satisfying marketplace verification requests instantly.
  • Integrated Multi-Market Compliance: Managing FCC for the US, CE Mark for the EU, and UKCA for the UK separately leads to documentation chaos. Sustalium maintains all three in a single product compliance passport, ensuring consistency and reducing administrative overhead.

Secure Your US Electronics Market Access

Don't let missing FCC documentation get your products delisted or your shipments seized.

With Sustalium, you can generate a complete FCC Part 15 compliance dossier and public verification page for just €10 per document.

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Frequently Asked Questions

Does my product need FCC certification if it has no wireless features?

Yes — if it contains any digital circuitry operating above 9 kHz. Even a simple LED driver with a microcontroller is an unintentional radiator and requires FCC Certification or SDoC.

Can I sell the same device in the US and EU with one test report?

No. While both jurisdictions measure RF emissions, the specific limits, test standards, and reporting procedures differ. Your test laboratory can often perform both FCC and CE testing during the same session, but you will receive separate test reports and must maintain separate compliance dossiers for each market.

What happens if my product causes interference?

If the FCC receives a complaint of harmful interference caused by your device, you may be required to cease operation of all units of that device until the interference problem is resolved — even if the device was previously certified. You are also liable for any fines or enforcement actions. This is why the Part 15 statement explicitly acknowledges that the device must accept any interference received.

Is an FCC ID required on the product or just the packaging?

The FCC ID must be permanently affixed to the physical product via a label, engraving, or electronic display (for devices with integrated screens). Placing it only on the packaging is insufficient. For very small devices where physical labeling is impractical, the FCC permits placement in the user manual and on the packaging, but this exception must be explicitly requested and justified.

Last updated: June 16, 2026