Square D LAP26400MT Molded Case Circuit Breaker
- 400A
- 2 Pole
- Unit Mount
Square D
LAP26400MT
Molded Case Circuit Breaker
Brand
Square D
SKU
LAP26400MT
Quantity
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Square D LAP26400MT - 400A 2 Pole Molded Case Circuit Breaker
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Description
Built to handle heavy electrical loads, the LAP26400MT is a 400A, two-pole breaker housed in a three-pole frame. It features a factory-installed plug-on shroud and line-side lugs. This unit mount breaker integrates into Square D switchboards and control panels. For modernization, it can be replaced by the PowerPacT L-Frame series using a retrofit kit. Delivering 30 kAIC at 480VAC, this legacy MCCB offers adjustable magnetic trip functionality and a visual trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | LAP26400MT |
| Series | LAP |
| Amperage | 400A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Switchboards, Motor Control Centers, Control Panels |
| Wire Gauge | 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Line Side Lugs Included, Plug-On Shroud (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, 2-Pole in 3-Pole Housing |
Product FAQs
7 answersWhat equipment is compatible with the LAP26400MT circuit breaker?
This L-Frame breaker is designed for integration into Square D switchboards, motor control centers, and industrial control panels that accommodate unit-mount, bolt-on configurations.
What are the wire size requirements for the LAP26400MT lugs?
The included lugs accept either a single 1 AWG to 600 kcmil wire or dual 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported.
Does the LAP26400MT allow for trip curve adjustments?
Yes, while the thermal overload protection is fixed, the magnetic instantaneous trip is adjustable. This allows electricians to fine-tune short-circuit response times for better coordination with downstream devices.
How does the LAP26400MT mount inside an enclosure?
It utilizes a unit-mount, bolt-on connection. Unlike I-Line plug-on breakers, this model must be bolted directly to the mounting pan or bus structure within the switchboard or control panel.
What frame type does the LAP26400MT use?
It is built on the legacy Square D LAL frame. It is a 2-pole breaker housed in a standard L-Frame footprint, making it a direct replacement for older LAL or LAP unit-mount breakers of the same amperage.
Can the LAP26400MT be installed in DC electrical systems?
Yes, in addition to its 600VAC rating, this breaker is rated for 250VDC applications, providing up to 10kAIC of short-circuit interrupting capacity for direct current circuits.
What trip functions are included in the LAP26400MT?
It features a thermal-magnetic trip unit with Long-Time and Instantaneous protection. The thermal element prevents overheating from sustained overloads, while the magnetic element trips immediately during high-fault short circuits.
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Reviews
Review summary
Customers rate this product 4.0 out of 5 based on 1 review.
Total 5 star reviews: 0 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
1 review
- MKMark K.ReviewingSquare D LAP36400MB - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars2/21/17LAP36400MB
Great price, quick delivery, minor cosmetic and surface blemishes but functionally perfect.