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SQUARE D Molded Case Circuit Breaker: 300 A Amps, 25kA at 600V AC, Adj, Box Lug - M-Frame Square D Molded Case Circuit Breakers
SQUARE DM-Frame Square D Molded Case Circuit Breakers

SQUARE D Molded Case Circuit Breaker: 300 A Amps, 25kA at 600V AC, Adj, Box Lug

The Square D MJA36300 is a 300 A, 3-pole M-Frame Molded Case Circuit Breaker rated 600V AC with a maximum AIR rating of 25kA at 600V AC. It features an adjustable instantaneous trip, box lug terminals, and ABC phase…

SKU 3G-OTH-609492

Brand
SQUARE D
Item
Molded Case Circuit Breaker: 300 A Amps, 25kA at 600V AC, Adj, Box Lug
Category
M-Frame Square D Molded Case Circuit Breakers
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Technical Specifications

SQUARE D
Manufacturer Part Number
MJA36300
Series
MJ
Type
25kA at 600V AC, Adj, Box Lug, ABC, MJ
AC
600V
Poles
3
Max. AIR Rating
25kA at 600V AC
Phase Connection
ABC
Instantaneous Trip
Adjustable
Terminal Connection
Box Lug
View Full Spec Sheet

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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Square D MJA36300 is a 300 A, 3-pole M-Frame Molded Case Circuit Breaker rated 600V AC with a maximum AIR rating of 25kA at 600V AC. It features an adjustable instantaneous trip, box lug terminals, and ABC phase connection, part of the MJ series.

Frequently Asked Questions

What is the Square D MJA36300 molded case circuit breaker used for?

The Square D MJA36300 is a 300 A, 3-pole M-Frame molded case circuit breaker used for overcurrent protection in industrial power distribution panels, motor control centers, and switchboards. Its adjustable instantaneous trip allows coordination with downstream equipment in 600V AC systems.

What are the specifications of the Square D MJA36300?

The Square D MJA36300 is rated 300 A at 600V AC, 3 poles, with a maximum AIR rating of 25kA at 600V AC. It features an adjustable instantaneous trip, box lug terminals, and ABC phase connection. It is part of the MJ series and has MPN MJA36300.

Where to buy the Square D MJA36300 worldwide?

3G Electric supplies the Square D MJA36300 worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time on this M-Frame molded case circuit breaker.

How to select the right Square D MJA36300 for my application?

To select the Square D MJA36300, verify your system voltage (600V AC max), continuous load (300 A), and available fault current (25kA at 600V AC). Ensure the adjustable instantaneous trip range covers your coordination needs. Confirm terminal type (box lug) and phase connection (ABC) match your panel.

Used in

Common applications for SQUARE D
Commercial building electrical panels — Square D QO series plug-in circuit breakers for branch circuit protection
Industrial motor control centers — Square D QOB series bolt-on breakers in NQOD panelboards
Heating equipment installations — Square D QOU series unit-mount breakers for overcurrent protection
Outdoor electrical distribution — Square D L-Frame enclosures housing LAL/LHL breakers for 400 A service
Indoor facility power distribution — Square D Q-Frame enclosures with QBL/QDL breakers for 225 A circuits
Retrofit and replacement in existing Square D load centers — QO series breakers for 120/240V AC systems

SQUARE D Products

3G Electric supplies SQUARE D m-frame square d molded case circuit breakers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Molded Case Circuit Breaker: 800 A Amps, 25kA at 600V AC, Adj, Box Lug, ABC, 3 Poles, 600V AC, MJ (MPN MJL36800). Key specifications — Terminal Connection: Box Lug; Phase Connection: ABC; Max. AIR Rating: 25kA at 600V AC; Instantaneous Trip: Adjustable; Series: MJ.
Molded Case Circuit Breaker: 300 A Amps, 18kA at 600V AC, Adj, Box Lug, CBA, 3 Poles, 600V AC, MG (MPN MGL36300). Key specifications — Terminal Connection: Box Lug; Phase Connection: CBA; Max. AIR Rating: 18kA at 600V AC; Instantaneous Trip: Adjustable; Series: MG.
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Molded Case Circuit Breaker: 600 A Amps, 25kA at 600V AC, Adj, Box Lug, CBA, 2 Poles, 600V AC, MJ (MPN MJL26600). Key specifications — Terminal Connection: Box Lug; Phase Connection: CBA; Max. AIR Rating: 25kA at 600V AC; Instantaneous Trip: Adjustable; Series: MJ.
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Molded Case Circuit Breaker: 700 A Amps, 25kA at 600V AC, Adj, Box Lug, ABC, 3 Poles, 600V AC, MJ (MPN MJL36700). Key specifications — Terminal Connection: Box Lug; Phase Connection: ABC; Max. AIR Rating: 25kA at 600V AC; Instantaneous Trip: Adjustable; Series: MJ.
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