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Square D LAL36350MB Molded Case Circuit Breaker
- 350A
- 3 Pole
- Unit Mount
Square D
LAL36350MB
Molded Case Circuit Breaker
Brand
Square D
SKU
LAL36350MB
Quantity
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Square D LAL36350MB - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LAL36350MB - 350A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LAL36350MB |
| Series | LAL |
| Amperage | 350A |
| 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, Motor Control Centers |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Short Handle, Lugs (Line and Load) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Short Handle, Trip-Free Mechanism |
Quantity
Square D LAL36350MB - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | LAL |
| Amperage | 350A |
| 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, Motor Control Centers |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Short Handle, Lugs (Line and Load) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Short Handle, Trip-Free Mechanism |
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Description
Engineered for industrial applications, the Square D LAL36350MB provides reliable thermal-magnetic protection. This 350A, 3-pole MCCB features a specialized short handle (MB suffix) allowing panel doors to close in shallow enclosures. The unit mount design installs into compatible switchboards and motor control centers. It serves as a robust solution for legacy infrastructure, eventually replaced by the LGL36350 frame. Delivering 30 kAIC at 480VAC, it includes adjustable magnetic trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | LAL36350MB |
| Series | LAL |
| Amperage | 350A |
| 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, Motor Control Centers |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Short Handle, Lugs (Line and Load) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Short Handle, Trip-Free Mechanism |
Product FAQs
5 answersWhat does the "MB" suffix mean on the LAL36350MB?
The "MB" suffix indicates that the circuit breaker is equipped with a short operating handle. This design allows it to fit into specific panelboards and enclosures where a standard-length handle would prevent the door from closing properly.
How do the trip adjustments work on the LAL36350MB?
This breaker features a thermal-magnetic trip unit with fixed thermal protection and an adjustable magnetic trip. The long-time thermal overload setting is fixed at 350 amps, while the instantaneous magnetic trip can be adjusted to coordinate with other protective devices in your system.
What are the wiring capabilities for the factory lugs on this breaker?
The included lugs are rated for both aluminum and copper conductors. Each phase can accept either a single wire ranging from 1 AWG to 600 kcmil, or two wires ranging from 1 AWG to 250 kcmil, providing flexibility for parallel runs.
Can the LAL36350MB be installed in an I-Line panelboard?
No, the LAL36350MB is a unit-mount (feed-thru) circuit breaker designed for industrial enclosures, switchboards, and motor control centers. It does not have the plug-on jaw connections required for Square D I-Line panelboards.
Does this breaker include a push-to-trip feature?
Yes, Square D LAL series breakers include a push-to-trip button on the faceplate. This safety feature allows you to manually trip the breaker to verify the mechanical operation of the tripping mechanism without exposing yourself to live parts.
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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.