- Factory Stock in Ontario
Circuit Breaker Enclosure · 600A, 600V AC · NEMA 1 Indoor, M4 Frame · Noark Electrical X600-600TYPE 1
X600-600TYPE 1
1632
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Molded Case Circuit Breaker · 400A, 3-Pole, 65kA @ 480VAC · Line/Load Lugs, Thermal-Magnetic Trip · Noark Electric M4N400T3L
SKU: M4N400T3L
400A 3-pole molded case circuit breaker with 65kA interrupting capacity at 480VAC, built on Noark’s M4N 600A frame and supplied with line/load lugs. Commonly used for switchboards, distribution equipment, and large feeder or motor applications where a higher frame size and field-ready lug terminations are required.
What this product is for
This molded case circuit breaker is used for overcurrent protection and disconnecting in commercial and industrial power distribution systems. It is a 400A, 3-pole breaker in Noark’s M4N series, supplied with line and load side lugs for feed-through installation.
Use for
Use for switchboards, panelboards, enclosed breaker assemblies, large feeders, and motor-related distribution where a 400A breaker with 65kA interrupting capacity at 480VAC is required. It is also suitable where a 600V AC class breaker and lug terminations are preferred for field wiring.
Avoid for
Avoid for applications requiring a different trip function, electronic trip unit, enclosure included from factory, or a breaker with a different interrupting rating or pole configuration. Confirm available fault current, conductor size, and equipment compatibility before ordering.
Best for
Best for electricians, panel builders, and maintenance teams needing a 400A MCCB on a 600A frame with factory lug terminations for new equipment builds or replacement work. The larger frame can also help when matching existing gear layouts or accessory families.
Installed in
Typically installed in electrical rooms, service distribution equipment, industrial control assemblies, and commercial or light industrial facilities. Final installation must follow the Canadian Electrical Code, equipment labelling, and manufacturer instructions.
Why this product exists
This breaker provides branch, feeder, or equipment protection where a 400A rating is needed but the application is built around Noark’s M4 600A frame platform. For buyers, that can simplify replacement matching, lugged field connections, and coordination within the same breaker family.
Compared with similar products
Compared with a 400A breaker on a smaller frame, this M4N model uses a 600A frame platform. Compared with electronic-trip breakers, this model uses a thermal-magnetic trip unit, which is commonly selected for straightforward feeder and equipment protection. As a rule of thumb, continuous loads are typically sized to 80% of breaker rating unless the equipment and application are specifically approved otherwise, so actual usable load depends on code, ambient conditions, and system design.
Actual performance depends on installation conditions, conductor sizing, equipment ratings, coordination study requirements, and local electrical code.
Specifications
- Manufacturer: Noark Electric
- Manufacturer part number: M4N400T3L
- Product type: Molded case circuit breaker (MCCB)
- Series / family: M4N
- Ampere rating: 400A
- Pole configuration: 3-pole
- Frame size: 600A frame
- Interrupting capacity: 65kA @ 480VAC
- Additional interrupting ratings found: 100kA @ 240VAC; 30kA @ 600VAC
- Voltage rating: up to 600VAC; some listings also reference up to 690VAC and 600VDC depending on catalogue context
- Trip unit: Thermal-magnetic, adjustable thermal / adjustable magnetic (AT/AM) as listed by distributors
- Terminations: Line and load side lugs included
- Standards: UL 489; CSA listed per distributor and catalogue references
- BrandNoark Electrical
- Warranty5 year
- Electrical
- Poles3 Pole
- Amps400 A
- Interrupt Rating (AIC)65 kA @ 480 Vac
- Physical
- MountingBolt-On
- Breaker TypeMoulded Case Circuit Breakers (MCCB)
Minimum Order $20
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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