Schneider Electric LA36300-1021 LA363001021 - 300A 3 Pole Molded Case Circuit Breaker
- 300A
- 3 Pole
- I-Line
Quantity
Schneider Electric LA363001021 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty commercial distribution, this 3-pole, 300A molded case circuit breaker provides essential long-time and instantaneous protection. The unit utilizes an I-Line plug-on connection, making it compatible with Square D I-Line panelboards. The PowerPact LJA36400U31X serves as the modern substitute. Equipped with a 120-240VAC shunt trip, it allows for remote breaker tripping. It features an adjustable magnetic trip and a 42kAIC rating at 240VAC.Specifications
| Brand | Schneider Electric |
|---|---|
| Series | LA |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 125VDC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480Y/277VAC, 30kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 125VDC, 10kA @ 250VDC |
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120-240VAC |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Push-To-Trip, Visual Trip Indicator |
Product FAQs
6 answersWhat does the -1021 suffix mean on the LA36300-1021 circuit breaker?
The -1021 suffix indicates that this circuit breaker includes a factory-installed 120-240 VAC shunt trip.
What types of panels are compatible with the LA36300-1021?
This I-Line style plug-in circuit breaker is designed exclusively for use in Square D I-Line panelboards and switchboards.
How does this breaker mount into the panel?
It utilizes an I-Line style plug-in connection, allowing it to mount directly onto the bus assembly of compatible Square D I-Line panelboards and switchboards without the need for bolt-on hardware.
What is the acceptable wire range for the lugs on this 300A breaker?
The factory lugs accept a single 1 AWG to 600 kcmil aluminum or copper wire, or two 1 AWG to 250 kcmil aluminum or copper wires per phase.
Is the trip unit on the LA36300-1021 adjustable?
Yes, this thermal-magnetic breaker features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection.
What frame size is the LA36300-1021?
It is a legacy L-frame molded case circuit breaker manufactured by Square D and Schneider Electric.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
- RGRobert G.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26LA36400
Perfectly boxed and arrived on time. Thanks for the shirt and stickers as well.
- CECraig E.Verified BuyerReviewingEaton / Cutler-Hammer LA3600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/13/25Westinghouse breaker
Excellent customer service and quick shipping
- CLClifton L.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/30/25estimator
Good
- BCBenjamin C.Verified BuyerReviewingEaton / Cutler-Hammer LA3225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Refurbished Breaker
Breaker seems to be working great, no complaints from Client
- JMJerry M.ReviewingEaton / Cutler-Hammer LA3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/14/23Where is my breaker?
Where is my breaker?