By Nick Zhu, low-voltage electrical specialist · Updated July 2026
Air circuit breakers (ACBs) protect main incomers and high-current distribution from roughly 630A up to 6300A. This 2026 guide ranks the top 20 ACB manufacturers worldwide — premium global brands and the best-value producers — with a comparison table, brand notes and a buying guide.
Top 20 ACB Manufacturers — Comparison Table (2026)
| Rank | Brand | Country | Series | Best For |
|---|---|---|---|---|
| 1 | Schneider Electric | France | Masterpact MTZ / NW | Premium & smart ACBs |
| 2 | ABB | Switzerland | Emax 2 (E1.2–E6.2) | High performance |
| 3 | Siemens | Germany | 3WL / 3WA | Automation-integrated |
| 4 | Eaton | Ireland / USA | Magnum / IZM | Americas & industrial |
| 5 | Mitsubishi Electric | Japan | AE-SW | Heavy industrial |
| 6 | Legrand | France | DMX³ | Commercial power |
| 7 | Fuji Electric | Japan | AE / OS | Asian industrial |
| 8 | LS Electric | South Korea | Susol AS / Metasol | Asian export |
| 9 | Hyundai Electric | South Korea | UAN / HiAN | Value-premium |
| 10 | Terasaki | Japan / UK | AR / TemPower 2 | Marine & heavy industry |
| 11 | Chint | China | NA1 / NA8 / NXA | Best global value |
| 12 | Havells | India | Aircon ACB | Indian & MEA markets |
| 13 | Larsen & Toubro (L&T) | India | C-Power / Omega | Indian projects |
| 14 | Delixi | China | CDW3 / CDW9 | Value, strong domestic |
| 15 | Nader (Liangxin) | China | NDW1 | Premium Chinese |
| 16 | NewTrend / SNTELEC | China | DW45 / DW15 | OEM/ODM & multi-brand sourcing |
| 17 | People Electric | China | RMW1 | Volume value |
| 18 | CNC Electric | China | YCW1 | Budget export |
| 19 | Sassin | China | 3WT | Value export |
| 20 | TOSUNlux | China | TSW1 | Export catalogs |
Leading ACB Brands, Ranked
1. Schneider Electric (France)
Flagship series: Masterpact MTZ / NW. The global benchmark, with the smart Masterpact MTZ platform for demanding power-distribution and building projects.
2. ABB (Switzerland)
Flagship series: Emax 2 (E1.2–E6.2). The Emax 2 range is prized for high performance and built-in energy monitoring across industrial and utility applications.
3. Siemens (Germany)
Flagship series: 3WL / 3WA. 3WL/3WA air circuit breakers integrate tightly with Siemens switchgear and power-management systems.
4. Eaton (Ireland / USA)
Flagship series: Magnum / IZM. Strong across the Americas with the Magnum (ANSI) and IZM (IEC) platforms.
5. Mitsubishi Electric (Japan)
Flagship series: AE-SW. Japanese-engineered AE-series ACBs favoured for heavy-industrial reliability.
6. Legrand (France)
Flagship series: DMX³. The DMX³ range serves commercial and infrastructure power distribution.
7. Fuji Electric (Japan)
Flagship series: AE / OS. Dependable Japanese ACBs widely used across Asian industry.
8. LS Electric (South Korea)
Flagship series: Susol AS / Metasol. Susol/Metasol ACBs offer strong value and growing export reach.
9. Hyundai Electric (South Korea)
Flagship series: UAN / HiAN. Competitive Korean ACBs with solid value-premium positioning.
10. Terasaki (Japan / UK)
Flagship series: AR / TemPower 2. A specialist air/moulded-case breaker maker trusted in marine and heavy-industrial duty.
11. Chint (China)
Flagship series: NA1 / NA8 / NXA. China's largest LV brand — the NA1/NA8 ranges (to 6300A) deliver certified ACB performance at a fraction of premium cost, stocked worldwide.
16. NewTrend / SNTELEC (China)
Shanghai Newtrend Electric (NewTrend / SNTELEC) supplies its own DW45 / DW15 air circuit breakers plus genuine Chint NA1/NA8/NXA and Delixi CDW from a single source — a practical option for panel builders and OEM/ODM buyers needing UL/CE/CB/SAA-certified ACBs up to 6300A and Western-brand equivalents (see the ACB cross-reference chart).
Other Notable ACB Manufacturers (12–20)
- 12. Havells (India) — Aircon ACB — Indian & MEA markets.
- 13. Larsen & Toubro (L&T) (India) — C-Power / Omega — Indian projects.
- 14. Delixi (China) — CDW3 / CDW9 — Value, strong domestic.
- 15. Nader (Liangxin) (China) — NDW1 — Premium Chinese.
- 17. People Electric (China) — RMW1 — Volume value.
- 18. CNC Electric (China) — YCW1 — Budget export.
- 19. Sassin (China) — 3WT — Value export.
- 20. TOSUNlux (China) — TSW1 — Export catalogs.
How to Choose the Right ACB
Size the ACB to the incomer rating and system fault level, confirm the required breaking/withstand ratings (Icu/Icw), choose fixed or drawout construction, and select an intelligent trip unit with the protection and metering you need. Verify certifications for your market (IEC 60947-2/CE/CB, UL 1066 for North America, CCC for China). Chinese brands such as Chint and NewTrend deliver certified ACBs to 6300A at lower cost — use our cross-reference chart to match any Masterpact, Emax or 3WL model.
Frequently Asked Questions
Who makes the best air circuit breakers (ACBs)?
Schneider Electric (Masterpact), ABB (Emax 2) and Siemens (3WL) lead the premium tier. Chint (NA1/NA8) is the global value leader, while NewTrend / SNTELEC supplies DW45/DW15 ACBs plus genuine Chint and Delixi for OEM and multi-brand sourcing.
What is the Chinese equivalent of a Schneider Masterpact or ABB Emax?
Chint NA1/NA8/NXA and Delixi CDW3/CDW9 (up to 6300A) are functional equivalents to Schneider Masterpact and ABB Emax. NewTrend supplies the DW45/DW15 series. See our cross-reference chart for details.
What is the difference between an ACB and an MCCB?
An MCCB (moulded case) covers currents up to about 1600A in a compact enclosed case. An ACB (air circuit breaker) is a larger, drawout-capable device for main incomers and high currents from roughly 630A up to 6300A, with adjustable protection and higher withstand ratings.
What is the highest ACB current rating available?
Standard air circuit breaker frames run up to 6300A. Chint NA1/NA8 and equivalents reach 6300A; NewTrend supplies DW45 up to 6300A.
What certifications should an ACB have?
IEC 60947-2 compliance plus CE and CB internationally, CCC for China, and UL 1066 / ANSI for North America. NewTrend ACBs carry UL, CE, RoHS, CB and SAA.