Verified
Solid quality component. Exactly as described on the product page.
Maintenance team · Ontario
Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Circuit Breaker
Square D | MA364001121 | Circuit Breaker | 400A | 3-Pole | 600V
| Part Number | MA364001121 |
| Amperes | 400 |
| Poles | 3 |
| Voltage | 600 |
| Product Type | Circuit Breaker |
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
Save
Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Square D | MA364001121 | Circuit Breaker | 400A | 3-Pole | 600V
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
Product description
Shipping
Engineered for high-demand power distribution, the Square D MA364001121 400A 3-Pole 600V Circuit Breaker is built to handle demanding maintenance, retrofit, and replacement scenarios where exact specifications and dependable protection matter most. This 3-pole design is ideal for three-phase electrical systems, delivering reliable interruption when faults occur and helping safeguard both equipment and personnel.
Key specifications
- Amperage: 400 A
- Poles: 3-Pole
- Voltage rating: 600 V
Why this breaker stands out
When you’re upgrading or replacing components in a live system, compatibility is everything. This MA364001121 model from Square D is purpose-built for situations where a precise 400A, 3-pole, 600V specification is required. Its design supports timely maintenance, retrofits, and replacements, helping you restore protection quickly without overhauling your panel architecture.
Use cases and ideal applications
- High-capacity service panels in industrial facilities that run three-phase equipment and machinery
- Retrofits to upgrade existing electrical infrastructure to higher amperage or to restore original protection levels
- Maintenance replacements in commercial and manufacturing environments where panel compatibility is dictated by the part number
Practical guidance for compatibility
Notes: Confirm fit and ratings before ordering. Part number is the best reference for compatibility. Use the MA364001121 as the primary comparison point when matching to your panel label and existing MCCB configurations to minimize downtime and ensure seamless protection.
What to expect in real-world use
In installations that demand robust, reliable fault isolation for three-phase feeders, this breaker provides a clear path to restore service after a trip, helping reduce unplanned downtime. It’s especially suited for facilities undergoing service upgrades, panel refurbishments, or replacements where maintaining exact electrical specifications is critical for system safety and performance.
Contact sales@ampstate.com
Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.
We want you to be 100% satisfied with your purchase.
What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
Verified
Packaging was secure and the item arrived clean and ready for installation.
Electrical contractor · GTA
Verified
We’ve used this type on multiple jobs and it’s been reliable so far.
Panel shop · Canada/US
