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Square D LAL36250MB Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Square D
LAL36250MB
Molded Case Circuit Breaker
Brand
Square D
SKU
LAL36250MB
Quantity
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Square D LAL36250MB - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LAL36250MB - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LAL36250MB |
| Series | LAL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 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 |
|---|---|
| Accessories | Short Handle |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Quantity
Square D LAL36250MB - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | LAL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 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 |
|---|---|
| Accessories | Short Handle |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Description
Engineered for industrial applications, the Square D LAL36250MB is a 250A, 3-pole molded case circuit breaker. It provides reliable thermal-magnetic protection for heavy-duty systems. This unit-mount breaker installs into Square D enclosures and switchboards. As a legacy L-Frame component, it is officially replaced by the newer LGL36250 model for modern upgrades. The MB suffix indicates a short operating handle, allowing it to fit behind shallow panel doors.Specifications
| Brand | Square D |
|---|---|
| Part Number | LAL36250MB |
| Series | LAL |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 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 |
|---|---|
| Accessories | Short Handle |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersWhat does the MB suffix mean in the LAL36250MB catalog number?
The MB suffix indicates that the circuit breaker is equipped with a short operating handle. This design allows the breaker to fit behind shallow panel doors where a standard handle might interfere.
What is the magnetic trip adjustability range for this 250A breaker?
The LAL36250MB features a thermal-magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic trip point can be adjusted between 1250A and 2500A.
Can I install the LAL36250MB directly onto the busbar of a Square D I-Line panelboard?
No, the LAL36250MB is a unit mount circuit breaker designed for bolt-on installation. It does not have the plug-on jaw connections required to mount directly to the busbar in an I-Line panelboard.
What wire sizes are compatible with the standard lugs on this breaker?
The standard lugs accept either one 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors per phase. The terminals are rated for both aluminum and copper wiring.
Does this breaker include a push-to-trip feature for testing?
Yes, the LAL36250MB includes a push-to-trip button. This allows you to manually trip the breaker to verify the mechanical operation of the trip mechanism without exposing personnel to live parts.
Is the LAL frame still the current standard for Square D 250A breakers?
The LAL series is a legacy molded case circuit breaker. While it has been superseded by the newer PowerPacT series for modern installations, the LAL36250MB remains widely used for direct replacements in existing industrial enclosures and switchboards.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 7 reviews.
Total 5 star reviews: 7 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
7 reviews
- MBmike b.Verified BuyerReviewingSquare D LAL36350 - 350A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/15/26LAL36350MB
OLINE ORDERING WAS EASY AND I RECEIVED THE BREAKER QUICKLY
- GCGlenn C.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/27/26Breaker
I like the great price. Great service
- MIMarietta I.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/27/26Great service
Received the breakers in time. My account mgr Mike is awesome.
- TBTerry B.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/26RECERTIFIED BREAKER
Breaker was received in good condition and seems to work correctly
- LBLISA B.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/28/25good [product
Expeditious delivery, great product and amazing customer service.