Square D JLA36250U43X Circuit Breaker
- 250A
- 3 Pole
- I-Line
Quantity
Square D JLA36250U43X 3 Pole Circuit Breaker
New
Quantity
Description
Square D JLA36250U43X 3 Pole Circuit Breaker
The Square D JLA36250U43X is a 3 Pole solid state molded case circuit breaker with a current rating of 250 Amps and a voltage rating of 600VAC. It has an interrupting rating of 125kAIC at 240VAC, 100kAIC at 480VAC. The JLA36250U43X has an I-Line style plug-in connection type and includes long time, short time and instantaneous trip functions.
Specifications
| Brand | Square D |
|---|---|
| Series | JLA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Frame Type | J |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | 3/0 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Standards | RoHS, REACh, HACR |
|---|---|
| Approval | CE, UL, CSA, NEMA, NOM, IEC |
| Temp Rating | -25 to 70 °C |
Product FAQs
7 answersWhat does the U43X suffix mean on the JLA36250U43X?
The U43X suffix indicates the breaker is equipped with a Micrologic 5.2A electronic trip unit. This provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) overcurrent protection, plus an integrated ammeter for monitoring phase currents.
How does the JLA36250U43X mount into a panel?
It utilizes an I-Line plug-in connection on the line side, which snaps directly onto the bus of a Square D I-Line panelboard or switchboard. The load side features mechanical lugs for wire termination.
What wire sizes are supported by the load lugs on this breaker?
The load-side lugs accept either aluminum or copper conductors ranging from 3/0 AWG to 350 kcmil. Ensure proper torque specifications are followed during installation as outlined by Schneider Electric.
Can the JLA36250U43X be used for selective coordination?
Yes. The solid-state Micrologic trip unit allows electricians to fine-tune the LSI pickup and delay settings, making it ideal for selective coordination in complex industrial or commercial distribution systems.
Does this breaker include ground fault protection?
No. The U43X trip unit provides LSI (Long-Time, Short-Time, Instantaneous) protection only. If your application requires equipment ground fault protection (LSIG), you would need a breaker with a U44X or U54X trip unit suffix.
What does the L in the JLA prefix represent?
In the Square D PowerPacT nomenclature, the L designates the interrupting capacity level. This specific letter indicates a high-tier interrupting performance for the J-frame series, stepping up from the standard D or G interrupting levels.
Is the JLA36250U43X rated for 80 percent or 100 percent continuous current?
This specific catalog number is standard rated for 80 percent continuous current. It is not a 100 percent rated breaker.
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.