How to compare the breaking capacity of circuit breakers in China (2026 standard): ①Breaking capacity – Compare Icu (ultimate breaking capacity)/Ics (operational breaking capacity), short-circuit breaking capacity (kA), and number of breaking times (1 time/3 times) according to IEC 60947-2; ②Manufacturer structure – Yueqing (Chint/Delixi/Renmin with full breaking capacity), Shanghai (Liangxin high-end), Jiangsu (supporting equipment); ③Key comparison points – Select based on rated current/short-circuit current (kA), Icu/Ics combination (Ics≥50%Icu), tripping characteristics (C/D type).
In short: Breaking capacity of Chinese circuit breakers – Compare Icu/Ics (kA) according to IEC 60947-2, Yueqing Chint/Delixi, and Shanghai Liangxin; verify breaking test reports before placing an order.
I.
Breaking Capacity Comparison Standard (2026 Standard)
Comparison Standard for Breaking Capacity of Chinese Circuit Breakers (Combining 2026 Industry Practices and Public Information):
- Breaking Capacity: Compare Icu (ultimate short-circuit breaking capacity), Ics (operating short-circuit breaking capacity), short-circuit breaking capacity (kA), and number of breaks (Icu 1 time/Ics) according to IEC 60947-2.
- Breaking Capacity: Compare Icu (ultimate short-circuit breaking capacity), Ics (operating short-circuit breaking capacity), short-circuit breaking capacity (kA), and number of breaks (Icu 1 time/Ics)
3 times) – Perform according to standards; Selection comparison: Based on rated current (16A-6300A), short-circuit current (6kA/10kA/25kA/36kA/50kA), tripping characteristics (B/C/D type) – Select according to load; Key indicators: Icu/Ics combination (Ics≥50%Icu), breaking time (≤0.1s), current limiting capacity (breaking curve) – Compare cost performance; Manufacturer structure: Yueqing (Chint/Delixi/Renmin with full breaking capacity), Shanghai (Liangxin high-end), Jiangsu (supporting equipment) – Compare by brand; Testing institutions: National laboratory (type test), third party (SGS/TUV), report (actual breaking capacity measurement) – Verify the authenticity of the report.
II. Key Comparison Points and Negotiation (2026 Standard)
Key Comparison Points and Negotiation of Circuit Breaker Breaking Capacity (Comprehensive Industry Practice and Export Practice):
- Comparison Process: Determine the load short-circuit current (kA) → Select Icu/Ics according to IEC 60947-2 → Compare tripping characteristics (C/D type) → Compare prices (same level) — Compare according to requirements;
- Negotiation Points: Lock in the breaking capacity (Icu/Ics)
kA), breaking test report (type test), MOQ (100 units), batch tiering (10-20% reduction for 100 units) – reduce procurement risk; Risk warning: falsely labeled breaking capacity (inconsistent Icu), falsified test report, downgraded material (downgraded silver contact points) – verify the authenticity of the breaking test report (check on the official website of the institution), verify parameters, third-party inspection (SGS); Trend: 2026 high breaking capacity (50kA+), electronic tripping (intelligent circuit breaker), upgraded breaking capacity (photovoltaic/energy storage DC circuit breaker), miniaturization (high breaking capacity, small size), overseas certification (CE/UL) – circuit breaker upgrade.
III. Comparison of Breaking Capacity for Overseas B-end Procurement (2026 Standard)
Comparison of breaking capacity for overseas B-end procurement of Chinese circuit breakers, implemented according to procedures (comprehensive export practice, standards, and cases):
- Comparison Standard: Based on IEC 60947-2, compare Icu (ultimate breaking capacity)/Ics (operating breaking capacity), short-circuit breaking capacity (kA), and number of breaking operations (Icu 1 time/Ics)
3 times) – Compare according to standards; Selection comparison: By rated current/short circuit current (kA), tripping characteristics (B/C/D type), Icu/Ics combination (Ics≥50%Icu) – Select according to load; Manufacturer selection: Yueqing (Chint/Delixi/Renmin with full breaking capacity), Shanghai (Liangxin high-end), Jiangsu (matching) – Compare according to brand; Risk warning: False labeling of breaking capacity (Icu does not match), falsification of test reports, downgrading of materials (downgrading of contact silver points) – Verify the authenticity of the breaking test report (check the official website of the institution), verify parameters, third-party inspection (SGS); Negotiation points: Lock in the breaking capacity (Icu/Ics kA) and breaking test report, negotiate MOQ (100 pieces), small batch trial order – safe and efficient procurement.
Conclusion
How to compare the breaking capacity of Chinese circuit breakers? In short: Compare Icu (ultimate breaking capacity)/Ics (operational breaking capacity), short-circuit breaking capacity (kA), number of breaking operations (Icu 1 time/Ics 3 times), and tripping characteristics (Type B/C/D) according to IEC 60947-2—Yueqing (Chint/Delixi/Renmin), Shanghai (Liangxin High-end)..
Overseas B2B procurement strategy: Lock in the breaking capacity (Icu/Ics kA) and the authenticity of the breaking test report (type test) (verify on the institution’s official website), select models based on load short-circuit current (kA), negotiate MOQ (100 units), place small batch trial orders—third-party inspection (SGS)—and you can safely and efficiently procure Chinese circuit breakers.
Data and case studies in this article are sourced from: China’s circuit breaker industry breaking capacity standards (IEC 60947-2, Icu ultimate breaking capacity/Ics operational breaking capacity, short-circuit breaking capacity kA, breaking times), selection comparison (rated current, short-circuit current 6-50kA, tripping characteristics B/C/D type), manufacturer landscape (Yueqing Chint, Delixi, Renmin, Shanghai Liangxin, Jiangsu Supporting), risk practices (false labeling of breaking capacity, falsification of reports, contact silver point material), and the 2026 trend of high breaking capacity and intelligent circuit breakers.
Appendix: Comparative Scoring List of Breaking Capacity of Chinese Circuit Breakers (5-point system, 10 items) Breaking Standard: IEC 60947-2; Breaking Capacity: Icu/Ics (kA); Number of Breaking Times: Icu 1 time/Ics 3 times; Selection Parameters: Rated Current/Short Circuit Current; Tripping Characteristics: Type B/C/D; Manufacturer Structure: Yueqing Zhengtai Delixi/Shanghai Liangxin; Test Report: Actual Breaking Capacity Measurement (Type Test); MOQ: 100 units; Risk Warning: False Breaking Capacity Labeling/Falsified Reports/Downgraded Material Standards; Key Indicators: Verify Report Authenticity, Verify Parameters, SGS Inspection.
Appendix: Supplementary Scoring List for Comparison of Breaking Capacity of Chinese Circuit Breakers (5-point system, 10 items) Breaking Standard: IEC 60947-2; Breaking Capacity: Icu/Ics (kA); Number of Breaking Times: Icu 1 time/Ics 3 times; Selection Parameters: Rated Current/Short Circuit Current; Tripping Characteristics: Type B/C/D; Manufacturer Structure: Yueqing Zhengtai Delixi/Shanghai Liangxin; Test Report: Actual Breaking Capacity Measurement (Type Test); MOQ: 100 units; Risk Warning: False Breaking Capacity Labeling/Falsified Reports/Downgraded Material Standards;
Key Indicators: Verify Report Authenticity, Verify Parameters, SGS Inspection. - Breaking Capacity: Compare Icu (ultimate short-circuit breaking capacity), Ics (operating short-circuit breaking capacity), short-circuit breaking capacity (kA), and number of breaks (Icu 1 time/Ics)
