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SQUARE D Molded Case Circuit Breaker: 400 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: 400 A Amps, 25kA at 600V AC, Adj, Box Lug

The Square D MJL26400 is a 2-pole M-Frame Molded Case Circuit Breaker rated for 400 A at 600 V AC with a maximum AIR rating of 25 kA at 600 V AC. It features an adjustable instantaneous trip, box lug terminals, and…

SKU 3G-OTH-609497

Brand
SQUARE D
Item
Molded Case Circuit Breaker: 400 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
MJL26400
Series
MJ
Type
25kA at 600V AC, Adj, Box Lug, ABC, MJ
AC
600V
Poles
2
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 MJL26400 is a 2-pole M-Frame Molded Case Circuit Breaker rated for 400 A at 600 V AC with a maximum AIR rating of 25 kA at 600 V 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 MJL26400 molded case circuit breaker used for?

The Square D MJL26400 is a 2-pole M-Frame molded case circuit breaker rated for 400 A at 600 V AC. It protects industrial electrical circuits from overloads and short circuits, with an adjustable instantaneous trip for flexible coordination. Common in manufacturing, HVAC, and power distribution systems.

What are the specifications of the Square D MJL26400?

The Square D MJL26400 is a 2-pole, 400 A molded case circuit breaker rated for 600 V AC with a maximum AIR rating of 25 kA at 600 V AC. It features adjustable instantaneous trip, box lug terminals, and ABC phase connection. Part of the MJ series, MPN MJL26400.

Where to buy the Square D MJL26400 worldwide?

3G Electric supplies the Square D MJL26400 molded case circuit breaker to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine Square D equipment and support your procurement needs.

How to select the right Square D molded case circuit breaker?

To select the right Square D molded case circuit breaker, match the voltage (600 V AC), current rating (400 A), and interrupting capacity (25 kA) to your system requirements. Verify pole count (2), terminal type (box lug), and trip adjustment (adjustable instantaneous). Consult a licensed electrician for coordination studies.

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: 600 A Amps, 25kA at 600V AC, Adj, Box Lug, CBA, 3 Poles, 600V AC, MJ (MPN MJA36600). 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: 600 A Amps, 25kA at 600V AC, Adj, Box Lug, CBA, 3 Poles, 600V AC, MJ (MPN MJA36600). Key specifications — Terminal Connection: Box Lug; Phase Connection: CBA; Max. AIR Rating: 25kA at 600V AC; Instantaneous Trip: Adjustable; Series: MJ.
Molded Case Circuit Breaker: 800 A Amps, 18kA at 600V AC, Adj, Box Lug, ABC, 3 Poles, 600V AC, MG (MPN MGL36800). Key specifications — Terminal Connection: Box Lug; Phase Connection: ABC; Max. AIR Rating: 18kA at 600V AC; Instantaneous Trip: Adjustable; Series: MG.
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Molded Case Circuit Breaker: 800 A Amps, 18kA at 600V AC, Adj, Box Lug, ABC, 3 Poles, 600V AC, MG (MPN MGL36800). Key specifications — Terminal Connection: Box Lug; Phase Connection: ABC; Max. AIR Rating: 18kA at 600V AC; Instantaneous Trip: Adjustable; Series: MG.
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.
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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: 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.
Molded Case Circuit Breaker: 350 A Amps, 18kA at 600V AC, Adj, Box Lug, CBA, 3 Poles, 600V AC, MG (MPN MGL36350). 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: 350 A Amps, 18kA at 600V AC, Adj, Box Lug, CBA, 3 Poles, 600V AC, MG (MPN MGL36350). Key specifications — Terminal Connection: Box Lug; Phase Connection: CBA; Max. AIR Rating: 18kA at 600V AC; Instantaneous Trip: Adjustable; Series: MG.
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: 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.
Molded Case Circuit Breaker: 350 A Amps, 25kA at 600V AC, Adj, Box Lug, CBA, 2 Poles, 600V AC, MJ (MPN MJL26350). 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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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.