CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
IEC 61000-6-4 is a generic emission standard for industrial-environment equipment; its Chinese counterpart is GB/T 17799.4. Both are TIER 1 generic standards — they apply only when no product-family EMC standard (CISPR 11, CISPR 14-1, CISPR 32) exists. Overall equivalence is MOD (modified adoption): GB/T 17799.4-2022 tracks IEC 61000-6-4:2018 limits, but Chinese mandatory certification (CCC) routes through GB 4824-2025 for ISM equipment, not the generic standard. Key procurement implication: confirm which standard your product family actually falls under before assuming GB/T 17799.4 applies.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 17799.4-2022 | 电磁兼容 通用标准 第4部分：工业环境中的发射 (EMC — Generic standards — Part 4: Emission for industrial environments) | Generic emission limits, industrial environment | Recommended (GB/T) | Current |
| GB/T 17799.4-2012 | 电磁兼容 通用标准 工业环境中的发射标准 (EMC — Generic standard — Emission standard for industrial environments) | Superseded edition (aligned to IEC Ed. 2.0) | Recommended (GB/T) | Superseded by GB/T 17799.4-2022 |
| GB 4824-2025 | 工业、科学和医疗设备 射频骚扰特性 限值和测量方法 (ISM equipment — RF disturbance characteristics — Limits and methods of measurement) | ISM equipment emission | Mandatory (GB) | Current |
| GB/T 17626.3-2023 | 电磁兼容 试验和测量技术 第3部分：射频电磁场辐射抗扰度试验 (EMC — Testing and measurement techniques — Part 3: Radiated RF immunity) | Radiated immunity test method | Recommended (GB/T) | Current |
| GB/T 17626.6-2017 | 电磁兼容 试验和测量技术 射频场感应的传导骚扰抗扰度 (EMC — Testing and measurement techniques — Conducted disturbance immunity) | Conducted immunity test method | Recommended (GB/T) | Current |
| GB/T 6113.102-2025 | 无线电骚扰和抗扰度测量设备和测量方法规范 第1-2部分：传导骚扰测量的耦合装置 (Specification for radio disturbance measuring apparatus — Part 1-2: Coupling devices for conducted disturbance) | Conducted disturbance measurement apparatus | Recommended (GB/T) | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| IEC 61000-6-4:2018 | TIER 1 — Generic Emission Standard | Sets emission limit values for industrial equipment |
| GB/T 17799.4-2022 | TIER 1 — Generic Emission Standard | Chinese adoption; sets emission limit values |
| GB 4824-2025 | TIER 1 — Product Standard | ISM equipment emission limits (takes precedence over generic) |
| GB/T 17626.3-2023 | TIER 2 — Test Method | Radiated immunity test procedure |
| GB/T 17626.6-2017 | TIER 2 — Test Method | Conducted immunity test procedure |
| GB/T 6113.102-2025 | TIER 2 — Test Method | Conducted disturbance measurement apparatus |
⚠️ Tier flag: GB/T 17626.3-2023 and GB/T 17626.6-2017 are immunity test methods (TIER 2), not emission. They are cited here only because they are commonly bundled in EMC compliance packages. They are not part of the IEC 61000-6-4 emission comparison — flag as misapplication if used as emission basis.
SCOPE BREAKDOWN
Generic Emission — Industrial Environment
Chinese standard: GB/T 17799.4-2022: 电磁兼容 通用标准 第4部分：工业环境中的发射 (EMC — Generic standards — Part 4: Emission for industrial environments)
International equivalent: IEC 61000-6-4:2018 (Ed. 3.0) — ⚠️ verify whether AMD1:2020 applies
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Conducted emission, 0.15–0.5 MHz, QP | 79 dB(µV) [Verify: GB/T 17799.4-2022 §5] | 79 dB(µV) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Conducted emission, 0.15–0.5 MHz, AV | 66 dB(µV) [Verify: GB/T 17799.4-2022 §5] | 66 dB(µV) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Conducted emission, 0.5–30 MHz, QP | 73 dB(µV) [Verify: GB/T 17799.4-2022 §5] | 73 dB(µV) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Conducted emission, 0.5–30 MHz, AV | 60 dB(µV) [Verify: GB/T 17799.4-2022 §5] | 60 dB(µV) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Radiated emission, 30–230 MHz, 10 m | 40 dB(µV/m) [Verify: GB/T 17799.4-2022 §5] | 40 dB(µV/m) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
| Radiated emission, 230–1000 MHz, 10 m | 47 dB(µV/m) [Verify: GB/T 17799.4-2022 §5] | 47 dB(µV/m) (IEC 61000-6-4:2018 §5) | identical | 直接互认 (Direct mutual recognition) | LOW |
⚠️ Both A and B agree on the classic industrial limits (79/66/73/60 dBµV; 40/47 dBµV/m). These are the CISPR 11 Class A-equivalent values historically carried by IEC 61000-6-4. Clause numbers flagged for official text confirmation.
ISM Equipment (Product-Family Precedence)
Chinese standard: GB 4824-2025: 工业、科学和医疗设备 射频骚扰特性 限值和测量方法 (ISM equipment — RF disturbance characteristics — Limits and methods of measurement)
International equivalent: CISPR 11:2015+A1:2016+A2:2019 — ⚠️ verify latest edition
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
Note: GB 4824-2025 is mandatory (GB) and takes precedence over the generic GB/T 17799.4 for ISM equipment. Parameter values not restated here — Verify: GB 4824-2025 §4–§6 for limit tables.
KEY DIFFERENCES SUMMARY
- Generic vs. product-family precedence — IEC 61000-6-4 / GB/T 17799.4 apply only absent a product-family standard. Deviation: N/A (scope rule). Mutual recognition: 直接互认 (Direct mutual recognition). Impact: HIGH.
- Mandatory status asymmetry — GB 4824-2025 is mandatory (GB); GB/T 17799.4-2022 is recommended (GB/T). Deviation: regulatory tier. Mutual recognition: 附加测试后互认 (Mutual recognition after additional testing). Impact: HIGH.
- Edition alignment — GB/T 17799.4-2022 aligns to IEC Ed. 3.0 (2018); older GB/T 17799.4-2012 aligns to Ed. 2.0. Deviation: edition drift. Mutual recognition: 附加测试后互认 (Mutual recognition after additional testing). Impact: MEDIUM.
- Amendment status of IEC 61000-6-4 — possible AMD1:2020 not confirmed. Deviation: unknown. Mutual recognition: ⚠️ UNRESOLVED. Impact: MEDIUM.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | CCC (where applicable); GB 4824-2025 for ISM | CE marking (EMC Directive 2014/30/EU); UL Listing |
| Engineering acceptance inspection | N/A for product standard comparison | N/A for product standard comparison |
| Import/export compliance | CCIB commodity inspection | Destination-country customs / EMC declaration |
| Designer/engineer obligation | N/A for product standard comparison | Local EMC regulation / EU EMC Directive |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB/T 17626.3-2023, GB/T 17626.6-2017, GB 4824-2025, GB/T 6113.102-2025 — all CURRENT (现行) per official SAMR status. No supersession notes added.
- ✅ FALSE POSITIVE (domain flag): GB/T 17626.3-2023 and GB/T 17626.6-2017 — flagged as potential misapplication in an emission comparison; usage is valid only as immunity test methods, not emission basis. Do not cite as emission compliance.
- ⚠️ UNRESOLVED: IEC 61000-6-4:2018/AMD1:2020 existence — verify against IEC webstore.
- ⚠️ UNRESOLVED: Exact clause numbers in GB/T 17799.4-2022 §5 — verify against official text.
- 🔴 CRITICAL CORRECTION: Do not label GB 4824-2025 as "GB/T". It is a mandatory national standard (GB).
PROCUREMENT VERDICT
- Confirm whether your product is ISM equipment — if yes, GB 4824-2025 governs, not GB/T 17799.4.
- If no product-family standard applies, use GB/T 17799.4-2022 and verify it aligns to IEC Ed. 3.0.
- Verify whether IEC 61000-6-4:2018/AMD1:2020 applies to your target market.
- Confirm CCC applicability for your specific product category.
- Obtain official GB/T 17799.4-2022 text to confirm §5 limit values and clause numbers.
- Do not use GB/T 17626.3/17626.6 as emission compliance evidence.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 17799.4-2022 §5 — conducted and radiated emission limit values
- GB 4824-2025 §4–§6 — ISM equipment limit tables
- IEC 61000-6-4:2018 §5 — emission limits; confirm AMD1:2020 status
- GB/T 6113.102-2025 — conducted disturbance coupling apparatus requirements
FIELD INSPECTION CHECKLIST
- Verify test report cites correct standard edition (GB/T 17799.4-2022, not 2012).
- Confirm test laboratory accreditation (CNAS / equivalent).
- Check conducted emission test setup per GB/T 6113.102-2025.
- Verify radiated emission test distance (10 m) and site validation.
- Confirm product classification (ISM vs. generic) against GB 4824-2025 scope.
CONFIDENCE RATING
🟡 MEDIUM — core limit values agreed across both AI sources; clause numbers and IEC amendment status flagged for official text confirmation.
Technical comparison report — CN Quality Check Standards Tool. This report is NOT a substitute for official standard texts or on-site engineering verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).
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