ISOMAX S1 MCCB 125A Thermal Magnetic Circuit Breaker
Walax ISOMAX-equivalent S1 molded case circuit breaker rated 125A with fixed thermal-magnetic protection. A compact, cost-effective feeder breaker for commercial distribution boards and motor circuits.
- Factory-direct pricing · OEM/ODM branding · IEC/CE compliance
- Wholesale & project supply to Africa, SE Asia & the Middle East
125A Feeder Rating
The standard rating for commercial sub-mains and motor feeders.
Compact S1 Frame
Space-efficient body for dense distribution boards.
Fixed Thermal-Magnetic
Simple, reliable protection with no settings to misadjust.
Technical Specifications
Standard ratings listed below – custom configurations available on request. Contact our engineers to confirm parameters for your market.




| Standard | IEC 60947-2 · CE |
| Rated current (In) | 125A |
| Poles | 3P / 4P |
| Rated voltage | AC 400V (50/60Hz) |
| Breaking capacity | 25kA |
| Trip type | Thermal-magnetic (fixed) |
| Frame | ISOMAX S1 (compact) |
| Mounting | Fixed / DIN rail |
| Mechanical life | ≥ 10,000 operations |
| Ambient temperature | -5°C to +40°C |
Where These Breakers Ship
Commercial distribution boards, sub-main feeders and motor control circuits up to 125A. The compact frame suits installations where board space is limited.
Frequently Asked Questions
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Need ISOMAX S1 MCCB 125A Thermal Magnetic Pricing?
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