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Square D LAL36300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Square D
LAL36300
Molded Case Circuit Breaker
Brand
Square D
SKU
LAL36300
Quantity
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Square D LAL36300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D LAL36300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | LAL36300 |
| Series | LAL |
| Amperage | 300A |
| 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 | Square D 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 | Line and Load Lugs (AL400LA) |
| 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, Mercury Free, PVC Free, RoHS Compliant |
Quantity
Square D LAL36300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | LAL36300-R |
| Series | LAL |
| Amperage | 300A |
| 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 | Square D 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 | Line and Load Lugs (AL400LA) |
| 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, Mercury Free, PVC Free, RoHS Compliant |
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Description
Designed for industrial power distribution, the Square D LAL36300 is a 300A, 3-pole molded case circuit breaker. It provides dependable thermal-magnetic protection for demanding environments. This unit-mount breaker installs into Square D switchboards, enclosures, and motor control centers. It is part of the legacy L-Frame family and is officially replaced by the LGL36300 model. It features an adjustable magnetic trip, a 30kAIC rating at 480VAC, and is HACR rated for HVAC applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | LAL36300 |
| Series | LAL |
| Amperage | 300A |
| 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 | Square D 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 | Line and Load Lugs (AL400LA) |
| 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, Mercury Free, PVC Free, RoHS Compliant |
Product FAQs
8 answersWhat are the adjustable magnetic trip settings for the LAL36300?
The LAL36300 features an adjustable instantaneous magnetic trip range with a low setting of 1,500A and a high setting of 3,000A.
Is the thermal trip setting on this breaker adjustable?
No, the thermal overload protection is fixed at 300A. Only the short-circuit magnetic trip function is adjustable.
Which lug kit is compatible with the LAL36300 circuit breaker?
This breaker uses the AL400LA mechanical lug kit for line and load terminations. The lugs accept either one 1 AWG to 600 kcmil or two 1 AWG to 250 kcmil aluminum or copper conductors per phase.
Is the LAL36300 an I-Line or unit-mount breaker?
The LAL36300 is a unit-mount, feed-thru circuit breaker. It is designed to be bolted into Square D industrial enclosures, switchboards, and motor control centers rather than plugging onto an I-Line bus.
What is the modern replacement for the legacy Square D LAL36300?
The legacy L-Frame LAL36300 is officially replaced by the modern Square D PowerPact L-Frame series, specifically the LGL36300 model.
Can the LAL36300 be installed in HVAC applications?
Yes, this circuit breaker is HACR rated, meaning it is certified for use with commercial heating, air conditioning, and refrigeration equipment.
How is this breaker applied in DC systems?
The LAL36300 is dual-rated for up to 250VDC, where it provides a 10kA interrupting rating. Always verify ungrounded system series wiring requirements per manufacturer guidelines before installation.
Does the LAL36300 feature a manual trip mechanism?
Yes, it includes a Push-to-Trip button that allows the circuit breaker to be manually tripped for testing and maintenance without exposing personnel to live electrical 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.