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Square D MJA36300 300A 3P 600V Circuit Breaker | AmpState
| Part Number | MJA36300 |
| Amperes | 300 |
| Poles | 3 |
| Voltage | 600 |
| Product Type | circuit-breaker |
Regular price
$21,482.00
Sale price
$21,482.00
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 MJA36300 300A 3P 600V Circuit Breaker | AmpState
Regular price
$21,482.00
Sale price
$21,482.00
Regular price
Unit price
Product description
Shipping
The Square D MJA36300 is a rugged, industrial-grade circuit breaker engineered for dependable overcurrent protection in panelboards, load centers, and distribution networks. Designed for 300 A per branch with three poles and a 600 V rating, this direct-part solution ensures reliable performance in demanding electrical environments while preserving compatibility with Square D panels and assemblies.
Why this matters in real-world setups: sourcing a part-number-specific breaker minimizes installation surprises, reduces cross-compatibility risk, and streamlines maintenance inventories. AmpState stocks the MJA36300 to support maintenance teams, panel builders, and spare inventories where a precise fit is essential for safety and performance.
- Part Number: MJA36300
- Amperage: 300 A
- Poles: 3
- Voltage: 600 V
- Type: Square D MJA-series circuit breaker
Ideal use cases
- Panelboards and load centers in commercial facilities, warehouses, and light industrial sites requiring robust 300 A protection
- Distribution panels within electrical distribution systems where exact part-number matching matters for reliability and coordination
- Spare inventory for panel builders and service teams who routinely work with Square D equipment
Practical considerations to maximize value
- Confirm the exact part number (MJA36300) to ensure mechanical fit and electrical characteristics align with your panel labeling and upstream protection scheme
- Verify system requirements include 600 V maximum and three-pole protection for the distribution arrangement
- When planning replacements, pairing this MJA-series breaker with compatible Square D panel hardware helps maintain coordinated performance and predictable trip behavior
Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit. AmpState is a trusted source for direct-match breakers like the MJA36300, making it easier to secure the exact component you need for reliable, compliant electrical protection.
Contact sales@ampstate.com
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What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
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Looks and feels like a proper industrial-grade part. Works as expected.
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