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SQUARE D Molded Case Circuit Breaker: 400 A Amps, 25kA at 120/240V AC, Adj, Lug - LA-, LH-, Q4-Frame Square D Molded Case Circuit Breakers
SQUARE DLA-, LH-, Q4-Frame Square D Molded Case Circuit Breakers

SQUARE D Molded Case Circuit Breaker: 400 A Amps, 25kA at 120/240V AC, Adj, Lug

The Square D Q4L3400 is a Q4-Frame Molded Case Circuit Breaker rated for 400 A at 240V AC, with a maximum AIR rating of 25kA at 120/240V AC. This 3-pole unit features an adjustable instantaneous trip, lug terminals…

SKU 3G-OTH-609462

Brand
SQUARE D
Item
Molded Case Circuit Breaker: 400 A Amps, 25kA at 120/240V AC, Adj, Lug
Category
LA-, LH-, Q4-Frame Square D Molded Case Circuit Breakers
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Technical Specifications

SQUARE D
Manufacturer Part Number
Q4L3400
Series
Q4
Type
25kA at 120/240V AC, Adj, Lug, ABC, Q4
AC
240V
Poles
3
Max. AIR Rating
25kA at 120/240V AC
Phase Connection
ABC
Instantaneous Trip
Adjustable
Terminal Connection
Lug
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SQUARE D Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Square D Q4L3400 is a Q4-Frame Molded Case Circuit Breaker rated for 400 A at 240V AC, with a maximum AIR rating of 25kA at 120/240V AC. This 3-pole unit features an adjustable instantaneous trip, lug terminals, and ABC phase connection, designed for reliable overcurrent protection in industrial electrical distribution systems.

Frequently Asked Questions

What is the Square D Q4L3400 molded case circuit breaker used for?

The Square D Q4L3400 provides overcurrent protection in industrial electrical distribution systems. Rated 400 A at 240V AC with a 25kA interrupting rating, it is suited for feeder and branch circuits in manufacturing plants, commercial buildings, and heavy machinery applications.

What are the specifications of the Square D Q4L3400?

The Square D Q4L3400 is a 3-pole, Q4-frame molded case circuit breaker rated 400 A at 240V AC. It has a maximum AIR rating of 25kA at 120/240V AC, adjustable instantaneous trip, lug terminals, and ABC phase connection. The series is Q4.

Where to buy the Square D Q4L3400 worldwide?

3G Electric supplies the Square D Q4L3400 to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this molded case circuit breaker.

How to select the right Square D Q4L3400 for my system?

Verify your system voltage (240V AC max), continuous load (400 A), and available fault current (up to 25kA). The adjustable instantaneous trip allows coordination with downstream devices. Ensure the lug terminals match your conductor size. Consult a licensed electrician for proper application.

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 la-, lh-, q4-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: 350 A Amps, 25kA at 120/240V AC, Adj, Lug, Non-Applicable, 2 Poles, Q4 (MPN Q4L2350). Key specifications — Terminal Connection: Lug; Phase Connection: Non-Applicable; Max. AIR Rating: 25kA at 120/240V AC; Instantaneous Trip: Adjustable; Series: Q4.
SQUARE D
Molded Case Circuit Breaker: 350 A Amps, 25kA at 120/240V AC, Adj, Lug, Non-Applicable, 2 Poles, Q4 (MPN Q4L2350). Key specifications — Terminal Connection: Lug; Phase Connection: Non-Applicable; Max. AIR Rating: 25kA at 120/240V AC; Instantaneous Trip: Adjustable; Series: Q4.
Molded Case Circuit Breaker: 400 A Amps, 42kA at 240V AC, Adj, Lug, Non-Applicable, 2 Poles, 600V AC (MPN LAL26400). Key specifications — Terminal Connection: Lug; Phase Connection: Non-Applicable; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
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Molded Case Circuit Breaker: 400 A Amps, 42kA at 240V AC, Adj, Lug, Non-Applicable, 2 Poles, 600V AC (MPN LAL26400). Key specifications — Terminal Connection: Lug; Phase Connection: Non-Applicable; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
Molded Case Circuit Breaker: 250 A Amps, 25kA at 120/240V AC, Adj, Lug, ABC, 3 Poles, 240V AC, Q4 (MPN Q4L3250). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 25kA at 120/240V AC; Instantaneous Trip: Adjustable; Series: Q4.
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Molded Case Circuit Breaker: 250 A Amps, 25kA at 120/240V AC, Adj, Lug, ABC, 3 Poles, 240V AC, Q4 (MPN Q4L3250). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 25kA at 120/240V AC; Instantaneous Trip: Adjustable; Series: Q4.
Molded Case Circuit Breaker: 250 A Amps, 42kA at 240V AC, Adj, Lug, ABC, 3 Poles, 600V AC, LAL (MPN LAL36250). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
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Molded Case Circuit Breaker: 300 A Amps, 42kA at 240V AC, Adj, Lug, ABC, 3 Poles, 600V AC, LAL (MPN LAL36300). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
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Molded Case Circuit Breaker: 300 A Amps, 42kA at 240V AC, Adj, Lug, ABC, 3 Poles, 600V AC, LAL (MPN LAL36300). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
Molded Case Circuit Breaker: 400 A Amps, 42kA at 240V AC, Adj, Lug, ABC, 3 Poles, 600V AC, LAL (MPN LAL36400). Key specifications — Terminal Connection: Lug; Phase Connection: ABC; Max. AIR Rating: 42kA at 240V AC; Instantaneous Trip: Adjustable; Series: LAL.
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Molded Case Circuit Breaker: 250 A Amps, 25kA at 120/240V AC, Adj, Lug, Non-Applicable, 2 Poles, Q4 (MPN Q4L2250). Key specifications — Terminal Connection: Lug; Phase Connection: Non-Applicable; Max. AIR Rating: 25kA at 120/240V AC; Instantaneous Trip: Adjustable; Series: Q4.
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Molded Case Circuit Breaker: 350 A Amps, 50kA at 250V DC, Instantaneous, Line/Load Lug, ABC, 3 Poles (MPN LHL36350). Key specifications — Terminal Connection: Line/Load Lug; Phase Connection: ABC; Max. AIR Rating: 50kA at 250V DC; Instantaneous Trip: Instantaneous; Series: LHL.
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