Square D JJL36250U43X Circuit Breaker
- 250
- 3 Pole
- Unit
Square D
JJL36250U43X
Circuit Breaker
Brand
Square D
SKU
JJL36250U43X
Quantity
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Square D JJL36250U43X 3 Pole Circuit Breaker
New
Quantity
Quantity
Square D JJL36250U43X 3 Pole Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Series | JJL |
| Amperage | 250 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 65kAIC at 480V |
| Frame Type | JJL |
|---|---|
| Terminal Type | Line and Load Side Lug |
| For Use With | Square D J-Frame Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | AWG 3/0 to 350KCmil, Aluminium/Copper |
| Trip Technology | Electronic Trip |
|---|
| Standards | RoHS, REACh, HACR |
|---|---|
| Approval | UL, CSA, CE, NEMA, NOM, IEC, |
Quantity
Square D JJL36250U43X 3 Pole Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Series | JJL |
| Amperage | 250 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 65kAIC at 480V |
| Frame Type | JJL |
|---|---|
| Terminal Type | Line and Load Side Lug |
| For Use With | Square D J-Frame Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | AWG 3/0 to 350KCmil, Aluminium/Copper |
| Trip Technology | Electronic Trip |
|---|
| Standards | RoHS, REACh, HACR |
|---|---|
| Approval | UL, CSA, CE, NEMA, NOM, IEC, |
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Description
Square D JJL36250U43X 3 Pole Circuit Breaker
The Square D JJL36250U43X 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 65kAIC at 480V. The JJL36250U43X has a feed-thru connection type and includes long time, short time and instantaneous trip functions.
Specifications
| Brand | Square D |
|---|---|
| Series | JJL |
| Amperage | 250 A |
| Poles | 3 |
| Mounting Style | Unit |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 65kAIC at 480V |
| Frame Type | JJL |
|---|---|
| Terminal Type | Line and Load Side Lug |
| For Use With | Square D J-Frame Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | AWG 3/0 to 350KCmil, Aluminium/Copper |
| Trip Technology | Electronic Trip |
|---|
| Standards | RoHS, REACh, HACR |
|---|---|
| Approval | UL, CSA, CE, NEMA, NOM, IEC, |
Product FAQs
7 answersWhat type of trip unit is installed in the JJL36250U43X?
This breaker features a Micrologic 5.2A electronic trip unit. The U43X suffix indicates it provides LSI (Long-Time, Short-Time, Instantaneous) protection functions along with an integrated ammeter for current monitoring.
Is the JJL36250U43X rated for use in DC voltage systems?
No. While some thermal-magnetic J-Frame breakers carry a 250VDC rating, models equipped with Micrologic electronic trip units, like the JJL36250U43X, are rated for AC voltage only.
What size wire do the standard lugs on this breaker accept?
The factory-installed AL250JD mechanical lugs accept one 3/0 AWG to 350 kcmil aluminum or copper conductor per phase.
How is the JJL36250U43X mounted in a panel?
The L in the JJL prefix indicates this is a unit-mount breaker. It secures directly to the backpan or mounting surface using screws and connects to the bus or cables via feed-thru lugs on both the line and load sides.
What does the J interrupting rating signify for this breaker?
The second J in the JJL prefix denotes a high interrupting capacity. It is rated to safely clear faults up to 100 kA at 240VAC, 65 kA at 480VAC, and 25 kA at 600VAC.
Is this breaker 80 percent or 100 percent rated?
The JJL36250U43X is a standard 80 percent rated circuit breaker. Continuous loads should not exceed 200 amps (80 percent of its 250A nominal rating) for three hours or more.
Can I use this breaker to replace a thermal-magnetic J-Frame breaker?
Yes, the JJL36250U43X shares the same physical dimensions, mounting footprint, and lug configurations as thermal-magnetic PowerPacT J-Frame breakers, making it a direct physical replacement when upgrading to electronic LSI protection.
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