FCC ID vs SDoC Wireless Charger: Which Path Applies?

1. The Short Answer: FCC ID vs SDoC for Wireless Chargers

Direct answer: a wireless charger isn't automatically an FCC ID product. Under 47 CFR Part 18, a consumer wireless power transfer device may be authorized through either Supplier's Declaration of Conformity (SDoC) or certification.

The right path depends on the charger's operating frequency, power per coil, exposure conditions, and whether it also transmits data. If the charger includes Bluetooth, Wi-Fi, NFC, or data telemetry, the data radio needs Part 15 certification. Many supplier quotes get this wrong because they treat every wireless charger as an intentional radiator that must have an FCC ID.

SDoC is a supplier's declaration backed by testing. The responsible party signs the compliance statement, keeps the test records, and supplies the statement with the product. There's no FCC ID number and no TCB grant. For SDoC products, the responsible party must be located in the United States.

Certification (FCC ID) is a review by a Telecommunications Certification Body. The product receives an FCC ID, appears in the FCC equipment authorization database, and carries a grant that identifies the grantee, model, and rule parts. Certification is the usual path for intentional radiators that transmit information, such as Bluetooth, Wi-Fi, or NFC radios.

Answer those four questions before you compare prices.

2. Why "Wireless Charger" Doesn't Automatically Mean FCC ID

The confusion starts with a true statement that gets applied too broadly. Wireless power transfer devices that operate above 9 kHz are intentional radiators. That doesn't mean every wireless charger must have an FCC ID. It means the device must be authorized under the applicable rule part, and the rule part offers choices.

FCC KDB 680106 explains the framework. WPT devices above 9 kHz are subject to Part 15 and/or Part 18. Part 18 applies when the device generates and uses RF energy locally for a non-communication purpose, such as charging. Part 15 applies when the device transmits information, or when the charging function is approved under Part 15 instead of Part 18.

Part 18 isn't a loophole. It's a separate equipment authorization framework with its own emission limits and RF exposure requirements. What matters is that 47 CFR §18.203 allows consumer ISM equipment to use either SDoC or certification. A supplier that says "wireless charging always requires FCC ID" is skipping the rule text and defaulting to the more expensive path.

The Part 15 Subpart H myth

Several lab blogs claim that low-frequency Qi chargers can use SDoC under "Part 15 Subpart H." That citation is wrong. 47 CFR Part 15 Subpart H covers White Space Devices, which operate in unused TV broadcast spectrum. It doesn't cover wireless power transfer.

The correct authorities are Part 18 §18.203 and FCC KDB 680106. When a supplier or certification agent cites Subpart H for a wireless charger, ask for the exact rule section and the KDB reference. A vague answer is a warning sign.

A typical sourcing scenario

Consider Maya, a US importer launching a private-label Qi2 charging pad. Supplier A sends an FCC ID grant for a similar model. Supplier B sends an SDoC statement with a US responsible party and a test report for the exact model she plans to order.

Maya likes Supplier A's price, but the grant covers a different coil configuration and a model number that doesn't match her packaging. Supplier B's packet is less impressive at first glance, but it matches the product, the importer, and the intended use. The cheaper packet would have created a documentation mismatch that could surface during a marketplace review or a customs inquiry.

3. When SDoC Is the Right Path

SDoC is available for Part 18 consumer ISM equipment under §18.203. For a wireless charger, it becomes practical when the design meets the KDB 680106 conditions and doesn't include a data radio.

The KDB conditions are cumulative. All of the following must be true:

• The power transfer frequency is below 1 MHz.
• The output power from each primary coil or transmitting element is 15 W or less.
• The client device is placed in physical contact with the transmitter.
• Only mobile exposure conditions apply. Portable exposure conditions are outside the exclusion.
• The measured E-field and H-field are below 50% of the applicable MPE limit at 15 cm around the device and 20 cm above the top surface.
• For multiple coils, the conditions are met with all elements operating at maximum power simultaneously.

If every condition is met, the device can be approved without a KDB inquiry. SDoC or certification may be used. If any condition fails, the device needs a KDB inquiry, and certification becomes the more likely path.

SDoC doesn't mean "no testing." The responsible party still needs test results that support the declaration, and the technical file must be available for FCC inspection. The declaration is a legal statement, not a marketing certificate.

SDoC also doesn't remove the importer's role. Under 47 CFR §2.909(b), the responsible party for SDoC equipment must be located in the United States. That party can be the manufacturer, the assembler, or the importer. If a non-US factory sends an SDoC statement with no US responsible party, the document is incomplete for the US market.

The SDoC statement must identify the product by name and model. It must include the compliance statement and the US responsible party's name, address, and phone or internet contact. Under §2.1077, the statement must accompany the product, either in the user manual or on a separate sheet. Electronic delivery is allowed if the user can reasonably access it.

What SDoC doesn't cover

SDoC doesn't cover a Bluetooth radio, Wi-Fi module, NFC reader, or any other data communication function. Those functions are Part 15 intentional radiators and generally require certification. A wireless charger with a Bluetooth speaker, a smart display, or a companion app that exchanges data is a hybrid device. The charging function may remain Part 18, but the data function needs its own authorization.

Qi/WPC certification is also separate. It is a voluntary interoperability mark, not an FCC authorization. See our Qi certification guide for the WPC process and how it differs from FCC.

4. When FCC ID (Certification) Is Required

Certification is the usual path when the device transmits information or falls outside the Part 18 exclusion criteria. The FCC ID grant is issued through a TCB and identifies the grantee, model, and rule parts. The product appears in the FCC equipment authorization database.

The most common triggers are:

• Data communication. Bluetooth, Wi-Fi, NFC, or proprietary data telemetry makes the device a Part 15 intentional radiator. The data radio needs certification. The charging function may still be Part 18.
• Higher power or higher frequency. A design above 15 W per coil, above 1 MHz, or outside the contact condition doesn't meet the KDB exclusion. A KDB inquiry is likely, and certification is the usual result.
• At-a-distance power transfer. WPT designed to deliver power beyond direct contact, or beyond the KDB distance limits, needs a case-specific review.
• Portable exposure conditions. The KDB exclusion is limited to mobile exposure. A charger designed for body-worn or portable use falls outside the exclusion.

Hybrid devices can carry both authorizations. The charging mode can be authorized under Part 18, while the data radio is certified under Part 15. The two modes must be independent, and the test report must show that each mode complies. This isn't a loophole; it's the FCC framework for products that perform two RF functions.

A supplier may offer only an FCC ID for a low-power Qi pad. That path can be more expensive than the design requires. It may also certify a module that doesn't match the final product. Ask which rule parts the grant covers. Ask which model is authorized.

5. Part 18 vs Part 15: The Rule That Decides Your Path

The rule part is the technical heart of the decision. Pick the rule part first. Part 18 and Part 15 serve different purposes, and the same product can use both when it performs both functions.

Three details matter for charger programs:

1. The 90–110 kHz restricted band. Part 15 devices may not transmit in this band. If the charger's operating frequency falls there, the rule part choice needs a closer review.
2. At-a-distance WPT. Power transfer beyond direct contact, or beyond the KDB distance threshold, needs a case-specific review.
3. RF exposure. Part 18 devices are not exempt from RF exposure compliance. The KDB conditions provide a path to avoid an inquiry, but the test report still needs to show compliance.

If the design is close to a boundary, ask the lab for a written rule-part assessment before tooling. A KDB inquiry takes time. Discovering the issue after the mold is cut is expensive.

For the safety side of the technical file, see our charger safety standards guide.

6. What US Importers Must Prepare

The compliance packet isn't just the certificate. The importer needs a file that matches the product, the model, and the US responsible party.

Identify the responsible party

For SDoC, the responsible party must be located in the United States under §2.909(b). The importer can be that party. If you are the importer of record, you may already be the responsible party even if the factory signed the test report. Confirm this in writing before the first shipment.

For certification, the grantee is the party that holds the FCC ID. The importer still needs to verify that the grant covers the exact model and that the label and user manual match the grant.

Collect the SDoC statement or FCC ID grant

For SDoC, the statement must include the product name and model, the applicable compliance statement, and the US responsible party's name, address, and phone or internet contact. For certification, collect the FCC ID, the grant, and the label artwork.

Match the test report to the product

Check the model number, coil configuration, power level, and radio modules. A test report for a similar model isn't a substitute for the model you are importing. If the factory changes the coil, the enclosure, the power path, or the radio module, ask whether the change affects the authorization.

Keep the file accessible

Keep the declaration, test report, label artwork, user manual statement, and model list together. If a marketplace, retailer, or customs authority asks for documentation, you need to respond with the exact file for the product, not a generic certificate.

Check the label and manual

The label and user manual must match the authorization path. An SDoC product needs the compliance statement; a certified product needs the FCC ID. A mismatch between the packaging, the label, and the grant is a common finding in supplier audits.

Match the document to the product.

Consider Priya, an Amazon seller who ordered a wireless charging stand with a Bluetooth speaker. The factory sent an SDoC statement for the charging function. The listing went live, and a retailer asked for the FCC ID for the Bluetooth radio. Priya didn't have one. The factory had certified the charging pad but not the speaker module. The listing was paused while the module was tested and the documentation was corrected. The cost wasn't just the test fee. It was the lost sales window and the rework of the packaging.

The fix is procedural: ask for the rule-part matrix before the purchase order. List every RF function, the rule part, the authorization, and the model. If a function has no document, the packet is incomplete.

7. How to Verify a Supplier's FCC Claim

A supplier's compliance claim is only as good as the document behind it. Verify the document, not the logo on the quotation.

Verify an FCC ID

1. Search the FCC equipment authorization database for the FCC ID.
2. Check the grantee name, model, and rule parts.
3. Compare the authorized model to the model on your purchase order.
4. Check whether the grant covers the radio module and the final product configuration.
5. Ask for the test report and the label artwork.

Check the model. Check the report.

Verify an SDoC claim

1. Read the SDoC statement. Does it identify the product and model?
2. Does it name a US responsible party with a physical address and contact details?
3. Does the test report match the product and model?
4. Does the statement accompany the product as required by §2.1077?
5. Is the factory able to explain which Part 18 conditions apply?

Red flags

• "FCC certified" with no FCC ID and no SDoC statement.
• A certificate from a private "certification body" that isn't an FCC-recognized path.
• A grant or report for a similar model, not the model you are buying.
• An SDoC statement with no US responsible party.
• A Qi certificate offered as a substitute for FCC documentation.
• A supplier who can't name the rule part or the KDB reference.
• A model number that changes between the quotation, the label, and the report.

For a step-by-step document check, see our guide to verifying FCC and CE charger certificates.

Questions to send the factory

• Which rule part applies to the charging function: Part 18, Part 15, or both?
• Does the device transmit data? If yes, which radio and which FCC ID?
• Does the design meet the KDB 680106 conditions? If not, was a KDB inquiry filed?
• Who is the US responsible party for the SDoC?
• Can you send the test report and the label artwork for the exact model?
• What changes would invalidate the authorization?

8. Cost and Timeline: What Drives the Difference

Don't budget from a blog post. Lab quotes vary with the test scope, the number of configurations, the radio modules, and the number of retests. The useful question isn't "What is the FCC fee?" It's "What work does this product require?"

SDoC and certification differ in review and documentation, not just testing. A Part 18 SDoC program still needs testing and a responsible party. A certification program adds TCB review, an FCC ID, and database entry. A hybrid device adds the Part 15 radio testing and may require separate reports for the charging and data functions.

The biggest cost drivers are:

• Rule-part complexity. A single-mode Part 18 charger is simpler than a hybrid charger with Bluetooth and a companion app.
• RF exposure. A design outside the KDB conditions may need a KDB inquiry and additional exposure evaluation.
• Configuration count. Multiple coils, multiple power levels, and multiple enclosure variants increase the test matrix.
• Retests. A failed emission or exposure test can add a redesign cycle.
• Documentation. A US responsible party, a compliant label, and a complete technical file take time to assemble.

Ask for a line-item quote that separates testing, TCB review, grantee code, RF exposure evaluation, and retest allowance. A single lump-sum number hides the variables that drive the schedule.

Next Steps: Match the FCC Path to Your Product

Direct answer: start with the rule part, the frequency, the power per coil, the exposure condition, and the data functions. Then choose SDoC or certification.

If the charger transfers power only and meets the KDB 680106 conditions, Part 18 SDoC or certification may both be available. If it transmits data, the data radio needs Part 15 certification. If the design falls outside the KDB conditions, plan for a KDB inquiry and certification.

Before you approve a purchase order, ask for the rule-part matrix, the exact-model test report, the SDoC statement or FCC ID grant, and the US responsible party. A supplier that can answer those questions is easier to qualify than one that sends a generic certificate.