MA36300 - 300 Amp Circuit Breaker
- 300 Amp
- 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
- 3 Pole
Purchase Options:
MA36300 - 300 Amp Circuit Breaker Description
MA36300 - 300 Amp Circuit Breaker
The MA36300 molded-case circuit breaker from Schneider Electric/Square D delivers dependable protection for demanding electrical systems. Rated for 600 V and 300 A across three poles, it’s engineered for heavy-duty commercial, industrial, and infrastructure installations. This breaker guards against overload and short-circuit events, delivering high performance and peace of mind.
Key Features and Benefits
- Long-lasting construction: built with a high-quality molded casing that withstands challenging conditions and repeated use
- Strong fault tolerance: high interrupting ratings protect downstream equipment from large fault currents
- Plug-in / I-Line style integration: fits seamlessly into I-Line distribution panels for faster installation
- Advanced trip unit: incorporates Schneider’s ET 1.0 technology for accurate response to abnormal current conditions
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Continuous rating buffer: 80 % continuous current rating gives you a margin under sustained load
Technical Specifications
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Voltage Rating: 600 VAC
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Current Rating: 300 A
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Poles: 3 (three-pole)
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Interrupting Capacity:
- Approx. 22 kA at 600 V
- 30 kA @480 V
- 42 kA @240 V
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Mounting Style: I-Line / plug-in style
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Trip Technology: ET 1.0 (thermal + magnetic)
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Continuous Current Rating: 80 %
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Frame Type: MA (M-frame)
Material Compliance and Certifications
- Green Premium Label: reflects Schneider Electric’s environmental transparency and commitment to sustainable manufacturing.
- California Proposition 65 warning: contains DINP and DIDP, chemicals known to the State of California to cause cancer and reproductive harm — handle per safety guidelines.
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Certifications: UL, CSA, IEC (as typical for this product class).
Where It Works Best
- This MA36300 breaker is ideal for environments where electrical safety and continuity are critical. Use it in:
- Commercial buildings (offices, malls, data centers)
- Manufacturing plants, factories, or process control systems
- Utility substations or distribution switchgear
- Any application where you require a reliable, heavy-duty circuit breaker with I-Line compatibility.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. All trademarks and registered trademarks are the property of their respective owners.
Specifications
- Width:9.0
- Height:16.0
- Depth:4.54
- Poles:3
- Amperes:300
- A.I.C. Rating & Volts:22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
- Type:MA
- Approx Dimensions:9.00"W x 16.00"L x 4.54"D
- Additional Notes:60Hz, 40å¡C, Thermal Magnetic, Molded Case Circuit Breaker, for I-Line Panelboards
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
FREE shipping on breaker orders over $100 and all other items with orders over $500.
CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).
Same Day Shipping
We strive to ship out your items within one business day.
In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.
CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).