Obtaining SRRC certification for wireless products can be a lengthy and expensive process – often taking 10‑16 weeks and costing $10,000‑$25,000. However, a well‑kept secret among experienced manufacturers is the use of pre-certified (or “modular approved”) wireless modules. If your product integrates an SRRC-certified Wi-Fi, Bluetooth, cellular, or other radio module, you can significantly simplify the SRRC application for the final host product. This guide explains how pre-certified modules work, when they can be used, and the steps to streamline your SRRC approval.
1. What Is a Pre-Certified (Modular Approved) SRRC Module?
A pre-certified module is a complete radio transmitter that has already obtained SRRC certification on its own. The module manufacturer has proven compliance with all applicable technical standards (e.g., GB/T, SRRC test methods) for that module when used in a generic, standalone configuration. Examples include:
- Wi‑Fi/Bluetooth combo modules (e.g., based on Qualcomm, Realtek, MediaTek chipsets)
- Cellular modules (4G LTE, 5G NR) from vendors like Quectel, SIMCom, Fibocom
- LoRa, Zigbee, or Thread modules
- GPS/GNSS receiver modules
When you integrate such a module into your own product (e.g., a smart speaker, a medical device, an industrial sensor), you can leverage the module’s existing SRRC certificate, subject to certain conditions. This is known as “modular approval” or “limited modular approval” depending on the module’s design.
2. Benefits of Using Pre‑Certified Modules for SRRC
Foreign manufacturers who adopt pre-certified modules enjoy several advantages:
- Faster time to market: Instead of 10‑16 weeks for full SRRC testing, host product certification can take as little as 4‑6 weeks, often with reduced testing (only radio coexistence and spurious emissions).
- Lower costs: Full SRRC testing of a custom radio design can exceed $20,000. Using a pre‑certified module typically reduces SRRC costs to $3,000‑$8,000, covering only the necessary host‑level tests.
- Reduced technical risk: The module maker has already solved most RF design challenges. Your risk of failing SRRC tests is dramatically lower.
- Easier documentation: You can reference the module’s SRRC certificate number and test reports, rather than generating all technical documents from scratch.
- Simplified factory inspection: For host products using certified modules, the factory inspection focuses more on assembly and labeling than on RF design and test equipment.
These benefits make pre-certified modules the preferred approach for many IoT, consumer electronics, and medical device manufacturers.
3. Conditions for Simplified SRRC Application Using a Pre-Certified Module
To qualify for a simplified SRRC application (sometimes called “host product certification based on modular approval”), the following conditions must be met:
- The module must have a valid SRRC certificate (check the public SRRC database). The certificate must not be suspended or expired.
- The module must be used exactly as certified – no changes to the module’s circuitry, shielding, or RF tuning. Even re‑routing the antenna trace on the host PCB is generally not allowed unless the module includes a certified antenna connector.
- The host product’s antenna must be of the same type and gain (or lower) as the antenna used during the module’s certification. If you change antenna type (e.g., from PCB trace to external dipole) or use a higher gain antenna, full retesting may be required.
- The module’s power supply to the host must be within the voltage range specified in the module’s certification. If you supply higher or lower voltage, the module’s RF performance may change, invalidating the certification.
- The host product must not contain any other radio transmitter that could cause harmful interference to the certified module (unless that transmitter is also certified and proper coexistence testing is performed).
If any of these conditions are violated, the modular approval is invalid, and you must undergo full SRRC testing for the host product. Always obtain the module’s “integration guide” from the manufacturer – it will list allowed antennas, power ranges, and any restrictions.
4. Step‑by‑Step Process for Host Product SRRC Using Pre-Certified Module
Assuming your product qualifies, the simplified SRRC application process involves the following steps:
- Select a certified module: Choose a module with an active SRRC certificate that matches your radio technology (Wi‑Fi, Bluetooth, cellular, etc.). Confirm the module manufacturer provides an integration guide and declaration of conformity.
- Design host PCB and antenna: Follow the module’s integration guide exactly. Use the recommended antenna type and gain, and keep the module’s RF section away from noisy digital lines.
- Conduct limited host testing: You still need to test spurious emissions (unintentional radiation from the host) and receiver immunity (if the host contains high‑speed digital circuits). Some labs also require coexistence testing if the host has multiple radios. This is far less extensive than full SRRC testing.
- Prepare documentation: Your dossier must include:
- Module manufacturer’s SRRC certificate and test reports
- Integration declaration signed by the module maker (confirming the module’s certification remains valid when used as directed)
- Host product’s test report (limited RF tests)
- Product photos, label, and user manual (in Chinese)
- Declaration that no modifications have been made to the certified module
- Submit application via a China agent: Foreign manufacturers must appoint an SRRC agent (often the same agent handling CCC). The agent submits the application and pays the fees (typically RMB 5,000‑15,000 for host product certification).
- Await certificate issuance: After submission, SRRC reviews the application. If all documents are in order, the host product certificate is usually issued within 4‑6 weeks – much faster than full certification.
Many labs offer “host testing packages” specifically for products using certified modules. The total cost, including testing and agent fees, typically ranges from $4,000 to $8,000, depending on the number of radios and complexity.
5. Common Pitfalls and How to Avoid Them
Even with a pre-certified module, manufacturers make mistakes that delay approval. Avoid these common issues:
- Changing the antenna without re‑certification: Any change to antenna type or gain (even a different PCB trace layout) is considered a modification. If you must change the antenna, request the module maker to add that antenna to their certification (via a “permissive change”) or conduct full testing.
- Using an expired or invalid certificate: Module certificates expire every 5 years. Always verify the certificate’s validity on the SRRC public website (http://www.srrc.org.cn). Certificates that have been suspended due to non‑compliance are also not acceptable.
- Missing coexistence tests for multi‑radio hosts: If your host contains both a certified Wi‑Fi module and a certified Bluetooth module, or a cellular module, SRRC requires additional tests to ensure the radios do not desensitize each other. Budget extra time and cost for coexistence testing.
- Incomplete translation of module documents: All documents from the module manufacturer (including the integration guide, test reports, and certificate) must be submitted in Chinese or with certified Chinese translations. Machine translations are rejected.
- Not declaring the module’s SRRC ID on the product label: The final product label must include both the host’s SRRC ID and the module’s SRRC ID (if space permits). Failure to do so can lead to customs detention.
Engage an experienced SRRC agent who can review your integration design and documentation before submission – it is a small investment that prevents costly rework.
6. When You Cannot Use a Pre-Certified Module (Need Full SRRC)
Despite the advantages, there are scenarios where a pre-certified module is insufficient:
- Custom radio design: If you design your own RF circuitry (discrete components, no certified module), you must undergo full SRRC testing.
- Modified module: If you alter the module’s shielding, power supply, clock, or any RF‑related component, the modular approval is voided.
- Unique antenna integration: If you cannot use any of the antennas approved in the module’s certification (e.g., you need a very high‑gain directional antenna), you may need to re‑certify the module+antenna combination.
- High‑power or special use cases: For products that require higher transmit power than the module’s certificate allows (e.g., some industrial IoT applications), modular approval does not cover you.
- Products with multiple independent radios operating simultaneously without coexistence guarantees: If your host has, say, a 5G module and a Wi‑Fi 6E module that share the same frequency band, SRRC may require new full testing to ensure they don’t interfere.
In such cases, prepare for a full SRRC application with complete testing – but still consider working with a module maker to develop a custom certified module (some vendors offer this service at added cost).
7. Real-World Example: Smart Speaker Using Pre-Certified Wi‑Fi/BT Module
A European manufacturer wanted to sell a smart speaker with Wi‑Fi 5 (802.11ac) and Bluetooth 5.2 in China. Instead of designing their own RF, they selected a pre‑certified module from a major vendor (with SRRC ID 2025XXXX). The module came with a PCB trace antenna and integration guide. The manufacturer followed the guide exactly, placing the module at the recommended location and using the recommended power supply. They then sent two units to an SRRC‑accredited lab for host testing: spurious emissions, receiver immunity, and Wi‑Fi/BT coexistence. Total testing cost was $5,000. With the help of a local agent, they submitted the application and received the host SRRC certificate in 5 weeks – compared to an estimated 14 weeks and $18,000 for a full custom design. The product launched on time and passed random customs inspections.
8. Checklist for Foreign Manufacturers Using Pre-Certified Modules
To ensure a smooth SRRC application, use this checklist:
- [ ] Select a module with an active SRRC certificate (verify online).
- [ ] Obtain the module’s integration guide and antenna approval list.
- [ ] Design host PCB exactly as specified, using approved antenna type and gain.
- [ ] Keep power supply within the module’s certified voltage range.
- [ ] Conduct host‑level limited testing (spurious emissions, receiver immunity, coexistence if multiple radios).
- [ ] Gather module certificate, test reports, and integration declaration.
- [ ] Prepare Chinese translations of all documents (certified).
- [ ] Include both module’s SRRC ID and host’s SRRC ID on product label.
- [ ] Appoint a China agent (if no local entity) to submit application.
- [ ] Submit and track application; respond to any queries within 48 hours.
Following this checklist can reduce your SRRC certification effort by over 50%.
Summary: Using pre-certified (modular approved) wireless modules is the most effective way to simplify your SRRC application. By selecting a certified module, following the integration guide, and conducting only host‑level limited testing, foreign manufacturers can cut certification time from months to weeks and reduce costs by more than half. Always verify the module’s certificate, avoid unauthorized modifications, and work with an experienced SRRC agent. This strategy enables faster market entry for your wireless products in China.