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Square D PJA36080U31A Molded Case Circuit Breaker
- 800A
- 3 Pole
- I-Line
Square D
PJA36080U31A
Molded Case Circuit Breaker
Brand
Square D
SKU
PJA36080U31A
Quantity
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Square D PJA36080U31A - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
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Square D PJA36080U31A - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | PJA36080U31A-R |
| Series | PJA |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 320-800A |
|---|
| Frame Type | PJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (3) 3/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, True RMS Sensing, Visual Trip Indicator, Adjustable Trip |
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Square D PJA36080U31A - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | PJA36080U31A-R |
| Series | PJA |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 320-800A |
|---|
| Frame Type | PJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (3) 3/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, True RMS Sensing, Visual Trip Indicator, Adjustable Trip |
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Description
Engineered for industrial applications, the Square D PJA36080U31A is an 800A, 3-pole PowerPacT P-Frame molded case circuit breaker. This unit installs into Square D I-Line panelboards and switchboards. The I-Line plug-on design ensures a secure, efficient connection, accommodating (3) 3/0 AWG to 500 kcmil wiring. Rated at 65 kAIC at 480V, it features a factory-installed Micrologic 3.0 electronic trip unit.Specifications
| Brand | Square D |
|---|---|
| Part Number | PJA36080U31A-R |
| Series | PJA |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 320-800A |
|---|
| Frame Type | PJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (3) 3/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Communication Module |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, 80% Rated, True RMS Sensing, Visual Trip Indicator, Adjustable Trip |
Product FAQs
8 answersHow much bus space does the PJA36080U31A require in an I-Line panel?
As a PowerPacT P-frame breaker, it requires 9 inches of mounting space on the bus of a Square D I-Line panelboard or switchboard.
What electronic trip unit is included with the U31A suffix?
The U31A designation indicates the breaker is equipped with a standard Micrologic 3.0 electronic trip unit. This provides adjustable Long-Time and Instantaneous (LI) protection but does not include Short-Time or Ground Fault features.
Is the PJA36080U31A rated for 100% continuous duty?
No, this breaker is standard-rated for 80% continuous duty. For applications requiring a 100% continuous current rating, a different catalog number featuring a 'C' designation is required.
What type of load-side terminals are provided?
This 800A breaker includes mechanical lugs on the load side. These lugs accept three 3/0 AWG to 500 kcmil aluminum or copper conductors per phase. The line side utilizes the standard I-Line plug-on jaw connection.
Can this I-Line circuit breaker be reverse-fed?
No. I-Line breakers feature a specialized plug-on jaw assembly on the line side that attaches directly to the panelboard bus. Because of this directional mounting design, they cannot be reverse-fed.
What does the PJA catalog designation indicate?
The 'P' signifies the PowerPacT P-frame size. The 'J' represents the specific interrupting rating tier (100kA at 240V, 65kA at 480V, 25kA at 600V), and the 'A' specifies the I-Line plug-on mounting style.
How do I adjust the settings on the Micrologic 3.0 trip unit?
The Micrologic 3.0 features rotary dials on the front of the trip unit. A qualified electrician can use a small screwdriver to adjust the Long-Time pickup, Long-Time delay, and Instantaneous pickup settings to properly coordinate with downstream devices.
What safety procedures are required before installing or servicing this breaker?
Installation and maintenance must only be performed by qualified electrical personnel. Verify that all power to the I-Line switchboard or panelboard is disconnected and locked out following standard OSHA lockout/tagout (LOTO) protocols before inserting or removing the breaker.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- TGTroy G.Verified BuyerReviewingSquare D PJA36120U44A - 1200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/21/25Help with flood conditions
The whole process with Technitrol was Awesome. Jim the owner was extremely helpful he caught some problems with one of the breakers that I didn't notice very helpful. James and Collin were great also. The whole company really step up helping me determine what path I should take to replace/refurbish breakers that went through a flood. I never experienced a flood like this they were an awesome resource and help to me and my employer the City of Wauwatosa
- RNRoss N.ReviewingSquare D PJA36080CU31A - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/12/22Stock!
Superbreakers has gotten my company out of a few binds recently. When stock is unavailable at my local supplier I've been turning to Superbreakers to save the day. Great customer service and timely shipments.