Square D JLA36250U54XEK Molded Case Circuit Breaker
- 250A
- 3 Pole
- I-Line
Quantity
Square D JLA36250U54XEK - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial facilities, this 250A, 3-pole MCCB belongs to the Square D PowerPacT J-Frame family. It installs into standard I-Line panelboards. This breaker includes load side lugs and a Breaker Status and Control Module (BSCM) with a 1.3m NSX cord. The I-Line mounting style ensures quick phase connections. The Micrologic 6.2E electronic trip unit delivers adjustable LSIG protection and integrated energy metering. It features a 100 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | JLA36250U54XEK |
| Series | JLA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Amperage Range | 100-250A |
|---|
| Frame Type | JLA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, I-Line Switchboards |
| Wire Gauge | 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Communication Module |
|---|---|
| Accessories | Load Side Lugs Included, Breaker Status and Control Module (BSCM) with 1.3m NSX Cord |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, Reverse Feed, Mercury Free, PVC Free, True RMS Sensing, Energy Metering, Phase Loss Protection, Ground Fault Protection |
Product FAQs
6 answersHow does the JLA36250U54XEK connect to the panelboard?
This breaker features an I-Line style plug-in connection. It is designed to mount directly onto the bus assembly of Square D I-Line panelboards and switchboards, allowing for quick installation without the need for individual wire connections on the line side.
What type of trip unit is included with the JLA36250U54XEK?
It is equipped with a Micrologic electronic trip unit featuring LSIG functions. The U54X designation indicates it provides adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault protection, along with integrated energy management capabilities.
What does the L interrupting rating signify on this J-Frame breaker?
The L in the JLA prefix indicates a high interrupting capacity. It is rated to safely clear fault currents up to 125kA at 240VAC, 100kA at 480VAC, and 50kA at 600VAC, making it suitable for commercial and industrial systems with high available fault currents.
Can this breaker be used in standard unit-mount applications?
No. The JLA36250U54XEK is specifically configured with an I-Line plug-on connection for use in Square D I-Line panelboards and switchboards. It cannot be used in standard unit-mount or DIN-rail applications.
What wire sizes are compatible with the load-side lugs on this breaker?
The factory lugs accept aluminum or copper wire ranging from 3/0 AWG to 350 kcmil. Ensure proper torque specifications are followed during installation to maintain a secure connection.
Does this circuit breaker provide equipment ground-fault protection?
Yes. The LSIG trip unit includes built-in Ground-Fault protection. This helps detect leakage currents to ground, protecting equipment from damage and reducing electrical fire hazards.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 1.0 out of 5 based on 1 review.
- DBDavid B.Verified BuyerReviewingSquare D JLA36250 - 250A 3 Pole Molded Case Circuit BreakerI do not recommend this productRated 1 out of 5 stars5/29/26Bad breaker
Recieved breaker, installed, turned power on, B phase not working. Went with these guys because it was quick but not so quick now.