Noark Ex9M1 Molded Case Circuit Breaker (MCCB) — 125A
The Noark M1N125T3L is a high-performance, 3-pole Molded Case Circuit Breaker from the Ex9M1 series.1 Engineered for reliability in both AC and DC applications, this 125 Amp breaker provides robust protection for industrial and commercial electrical systems.
Featuring Adjustable Thermal-Magnetic technology, it allows for precision tuning of both overload and short-circuit protection to match your specific load requirements.2
Key Performance Features
Adjustable Protection: Features a 0.8–1.0x adjustable thermal setting and a 5–10x adjustable magnetic trip, providing flexible protection for varying motor and power distribution loads.3
High Breaking Capacity: Rated for up to 100kA at 240Vac and 35kA at 500Vdc, ensuring safety during major fault events.
Patented Arc Extinguishing: Innovative design quickly quenches electrical arcs, extending the lifespan of the contacts and increasing system safety.4
Ease of Operation: The bearing-type spindle significantly reduces the force required to toggle the mechanism, ensuring smooth manual operation.5
Ready to Install: Comes standard with pre-installed line and load lugs, supporting conductors from #14 AWG to #3/0 AWG.6
Technical Specifications
| Specification | Details |
| Manufacturer / SKU | Noark / M1N125T3L (1102172) |
| Poles | 3-Pole (3P3d) |
| Frame / Trip Current | 150 AF / 125 AT |
| Voltage Ratings | 600Vac / 600Vdc (UL) |
| Interrupt Rating (480V) | 65kA |
| Thermal Protection | Adjustable: 100A – 125A |
| Magnetic Protection | Adjustable: 625A – 1250A |
| Operating Temp | -25°C to +70°C |
| Dimensions | 6.46″ (H) x 3.54″ (W) x 3.33″ (D) |
Certified Reliability
Standards & Compliance: This unit is UL 489 listed (File E355392) for the US and Canada (CSA C22.2 No. 5).7 It also meets IEC/EN 60947-2 standards and is CE and RoHS compliant.8 With a 10,000-cycle mechanical durability rating, it is built for long-term service in critical environments.
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