Schneider Electric LA36350-1021 LA363501021 - 350A 3 Pole Molded Case Circuit Breaker
- 350A
- 3 Pole
- I-Line
Quantity
Schneider Electric LA363501021 - 350A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for heavy-duty commercial power distribution, the LA36350-1021 is a 350A, 3-pole MCCB from Schneider Electric. It features a thermal-magnetic trip unit with long-time and instantaneous protection, plus an adjustable magnetic trip for precise coordination. Designed for Square D I-Line panelboards, this L-Frame breaker includes a factory-installed 120-240VAC shunt trip. Rated 30 kAIC at 480VAC. For modern upgrades, it is replaced by the LJA36400U31X with an added S29386 shunt trip.Specifications
| Brand | Schneider Electric |
|---|---|
| Series | LA |
| Amperage | 350A |
| 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
8 answersWhat does the "-1021" suffix indicate on the LA36350-1021?
The "-1021" suffix denotes that this breaker comes with a factory-installed 120/240VAC shunt trip. This allows the breaker to be tripped remotely by applying a voltage signal to the shunt trip coil, which is commonly used for emergency stop or safety interlock systems.
Can I install the LA36350-1021 in a standard Square D NQ or NF panelboard?
No. The LA36350-1021 features an I-Line plug-in mounting style and is exclusively compatible with Square D I-Line panelboards and switchboards. It will not fit into NQ, NF, or QO load centers.
How does the adjustable magnetic trip work on the LA36350-1021?
While the thermal overload protection is fixed at 350A, the magnetic instantaneous trip is adjustable from 1750A to 3500A. This allows electricians to tune the breaker to coordinate with downstream devices and prevent nuisance tripping from motor inrush currents.
Is the LA36350-1021 still manufactured, or is there a replacement?
The legacy Square D LA-frame series has been discontinued and replaced by the modern PowerPacT L-Frame series for new installations. However, the LA36350-1021 remains an exact drop-in replacement for existing I-Line panelboards without requiring panel modifications.
Can the LA36350-1021 be used in a 250VDC system?
Yes, this breaker is rated for DC applications up to 250VDC. It provides an interrupting capacity of 10kA at both 125VDC and 250VDC, making it suitable for industrial DC power distribution.
What wire sizes are accepted by the lugs on this 350A breaker?
The standard mechanical lugs accept either one 1 AWG to 600 kcmil wire, or two 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported, providing flexibility for large feeder installations.
Does the LA36350-1021 include ground fault protection?
No, this specific catalog number features a standard thermal-magnetic trip unit (LI) with long-time and instantaneous protection only. It does not include equipment ground fault protection (LSIG).
How is the LA36350-1021 mounted in the panel?
It utilizes an I-Line style plug-in connection. The breaker snaps directly onto the I-Line bus stack in compatible Square D panelboards and switchboards, allowing for rapid installation without the need for bolt-on bus connections.
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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?