Many people ask if FCC SDoC can be completed within one week. The answer depends on product type. For simple power adapters that pass conducted and radiated emission tests on the first try, the whole process from sample delivery to report issuance can be finished in over a week. However, complex products or those requiring rectification will take much longer.

Unlike FCC ID, FCC SDoC does not involve complicated TCB review or official approval from the FCC, but it is more than just signing a declaration. Every step including sample delivery, testing, report issuance and declaration signing follows standard procedures.

1. Full Process of FCC SDoC Declaration of Conformity

Based on practical project experience, the whole workflow is divided into the following steps:

Step 1: Product Classification Confirmation

This seemingly simple step is where many manufacturers make mistakes. First, check if the product has wireless transmission functions. Items equipped with Bluetooth, Wi-Fi, Zigbee, 4G/5G and other radio frequency modules are not eligible for SDoC and must apply for FCC ID instead. Only non-radio products can proceed with the SDoC process. Misjudgment at this stage will waste all subsequent efforts. This step normally takes half a day to one day, mainly by reviewing product specifications and conducting teardown inspection.

Special reminders: Some products have no visible wireless functions but are built-in with wireless modules or wireless charging coils. These devices are defined as radio frequency transmitters and cannot use SDoC. Microwave ovens are regulated under FCC Part 18, so neither SDoC nor FCC ID applies to them.

Step 2: Prepare Technical Documents & Test Samples

Required documents include user manuals, circuit schematics, PCB layout drawings and Bill of Materials (BOM). One main test sample is sufficient for regular products; a backup sample is optional but recommended by labs to avoid delays caused by sample damage. Extra backup units are only mandatory for large industrial equipment with complex structures and potential rectification needs.

If all drawings and BOM are ready, document sorting takes about half a day. It will take 1 to 2 additional days if complete technical files need to be compiled from scratch. Domestic courier delivery for samples generally takes one day.

Step 3: EMC Testing at Authorized Labs

This is the core and most time-consuming phase of the entire process.

Tests are conducted per FCC Part 15 Subpart B, covering conducted emission and radiated emission. According to 47 CFR 15.33(b)(1), the test frequency range for radiated emission is determined by the maximum clock frequency of the device: up to 1 GHz if the clock frequency is below 108 MHz, and up to 2 GHz if it exceeds 108 MHz. Most SDoC-qualified products have a clock frequency below 108 MHz, so testing up to 1 GHz is enough.

Actual testing for standard products takes 1 to 3 working days. Considering lab scheduling, sample verification and document pre-review, the overall period for this stage ranges from 5 to 10 working days when queuing is required.

Step 4: Issue Test Report & Compile SDoC Declaration

After passing all tests, the laboratory issues the official EMC test report, and the US-based responsible party signs the SDoC Declaration of Conformity. This step takes 1 to 3 working days.

Step 5: Labeling & Document Archiving

Affix compliance labels on products (the FCC logo is optional, while mandatory compliance statements must be marked). Archive all test reports, SDoC documents and technical files. Per 47 CFR 2.938(f), relevant records must be retained for at least 2 years after the product is discontinued. This final step takes about half a day.

  2. Overall Lead Time of FCC SDoC

A standard SDoC project takes 2 to 4 weeks in total under normal circumstances. Detailed timeline for different scenarios:

·Simplest case: Mature product design, low clock frequency, available lab schedule and first-pass testing. The whole process from sample delivery to document completion takes around 10 working days, roughly 2 weeks.

·Medium complexity: Products with clock frequency over 108 MHz or minor rectification required after initial testing. The lead time is 3 to 4 weeks.

·High complexity: Poor EMC design requiring multiple rounds of rectification, or tight lab scheduling. The process may last 5 to 6 weeks or longer. Severe design defects that require circuit revision or component replacement will extend the timeline further.

Tips to Shorten Lead Time

·Pre-testing: Conduct a pre-scan before official testing to identify potential EMC issues in advance. Pre-testing takes half a day to one day and greatly improves the first-pass rate.

·Reserve lab schedule in advance: Authorized ISO/IEC 17025 labs often have a waiting list of 1 to 2 weeks, especially in peak seasons. Urgent projects can apply for expedited service with a 30% to 50% cost increase (subject to lab availability).

·Prepare documents beforehand: Complete all technical files before sample delivery to avoid delays after testing.

·Choose labs with fast report issuance: Some labs issue reports within 1 or 2 days after testing, while others take 3 to 5 days.

  3. Lead Time Comparison: SDoC vs FCC ID

FCC ID requires extra procedures including TCB review and FCC database registration. The TCB review alone takes 2 to 4 weeks, so the full FCC ID process normally lasts 4 to 8 weeks. Complex wireless products or document revisions may extend it to 2 to 3 months.

SDoC skips TCB review and FCC registration, so it is nearly twice faster than FCC ID with much lower costs. Note that poor product EMC performance will cause delays for both certification paths.

For FCC SDoC Declaration of Conformity services, please contact Blueasia: 13534225140