Schneider Electric / Square DPJL36120U44A
Square D PJL36120U31A Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Square D
PJL36120U31A
Molded Case Circuit Breaker
Brand
Square D
SKU
PJL36120U31A
Quantity
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Square D PJL36120U31A - 1200A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial applications, the Square D PJL36120U31A is a 1200A, 3-pole PowerPacT P-Frame MCCB. It provides reliable power distribution for high-capacity systems. This unit-mount breaker features lug terminals and fits Square D QED switchboards, Model 6 motor control centers, and P-Frame enclosures, replacing legacy PE Series units. Equipped with a Micrologic 3.0 electronic trip unit, it delivers adjustable long-time and instantaneous (LI) protection with a 65kAIC rating at 480V.Specifications
| Brand | Square D |
|---|---|
| Series | PJL |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | P |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards, Model 6 Motor Control Centers, PowerPacT P-Frame Enclosures |
| Wire Gauge | (4) 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Padlock Attachment |
|---|---|
| Accessories | Micrologic 3.0 Trip Unit |
| 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 | 80% Rated, HACR Rated, True RMS Sensing, Interchangeable Trip Unit, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
10 answersWhat equipment is the PJL36120U31A compatible with?
This unit-mount breaker is designed for use in Square D QED switchboards, Model 6 motor control centers, and PowerPacT P-Frame enclosures.
Can I use this breaker in an I-Line panelboard?
No, the PJL36120U31A is a unit-mount breaker designed to be bolted into place. It is not compatible with I-Line panelboards, which require plug-on I-Line style breakers.
What type of trip unit is installed in the PJL36120U31A?
It features a Micrologic 3.0 electronic trip unit, which provides adjustable long-time and instantaneous (LI) protection for precise circuit coordination.
Is the long-time trip function adjustable on this breaker?
Yes, the Micrologic 3.0 trip unit allows you to adjust the long-time pickup settings to match your specific load requirements and ensure proper system coordination.
What size wire does the PJL36120U31A accept?
The factory-installed lugs accept four 3/0 AWG to 500 kcmil aluminum or copper conductors per phase.
Can I use copper wire with the standard lugs on this breaker?
Yes, the included lugs are dual-rated for both aluminum and copper conductors, providing flexibility during installation.
What does the U31A suffix mean in the PJL36120U31A catalog number?
The U31A suffix indicates that the breaker is equipped with a Micrologic 3.0 standard electronic trip unit featuring long-time and instantaneous (LI) trip functions.
Does this breaker provide ground fault protection?
No, the Micrologic 3.0 LI trip unit does not include ground fault protection. If ground fault protection is required, a breaker with a Micrologic 6.0 LSIG trip unit is necessary.
What is the continuous current rating of the PJL36120U31A?
This breaker has a standard 80 percent continuous current rating, meaning the continuous load should not exceed 960 amps.
How is the PJL36120U31A mounted?
It is a unit-mount breaker, meaning it bolts directly to the bus or mounting pan in compatible switchboards and enclosures, rather than plugging onto a bus stack.
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