Verified
Solid quality component. Exactly as described on the product page.
Maintenance team · Ontario
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Circuit Breaker
Square D | MA363001121 | Circuit Breaker | 300A | 3-Pole | 600V
| Part Number | MA363001121 |
| Amperes | 300 |
| Poles | 3 |
| Voltage | 600 |
| Product Type | Circuit Breaker |
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
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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 | MA363001121 | Circuit Breaker | 300A | 3-Pole | 600V
Regular price
$2,010.00
Sale price
$2,010.00
Regular price
Unit price
Product description
Shipping
Meet the Square D MA363001121 circuit breaker — a purpose-built protector for demanding electrical systems that demand reliable, precise protection. Designed for maintenance, retrofit, and replacement, this unit is tailored to environments where exact specifications matter, ensuring your panel continues to run safely and efficiently.
- Amperage: 300 A
- Configuration: 3-Pole, ideal for three-phase circuits
- Voltage rating: 600 V
- Part reference: MA363001121
- Best use: Maintenance, retrofit, and replacement projects requiring precise spec alignment
Why this model stands out in real-world installations: the 3-pole design provides robust overcurrent protection for 3-phase feeders and equipment operating at up to 600 volts. When you’re upgrading an aging panel, replacing a failed breaker, or retrofitting for a higher-demand circuit, the MA363001121 delivers dependable performance that aligns with the original Square D specifications you rely on.
Ideal use cases
- Industrial facilities upgrading control panels or motor-distribution circuits into a three-phase 600V system
- Maintenance inventories for facilities with Square D legacy panels that require exact-specified replacements
- Retrofit projects where maintaining proper protection coordination and trip characteristics is essential
Practical selection tips
- Always verify fit and ratings against your panel’s data sheet. The MA363001121 part number is your strongest reference for compatibility.
- Confirm the breaker’s form factor, mounting, and termination method matches the existing installation to avoid compatibility gaps.
- Use this model for applications where a 300 A, 3-Pole, 600 V protection device is required to safeguard three-phase equipment and feeders.
In short, the Square D MA363001121 is a precise, reliable choice for specialists who need an exact-match replacement or retrofit component. By sticking with the specified part number and ratings, you preserve protective coordination, minimize downtime, and maintain the integrity of your 3-phase, 600V electrical system.
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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
