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Square D PJA36120 Molded Case Circuit Breaker
- 1200A
- 3 Pole
- I-Line
Square D
PJA36120
Molded Case Circuit Breaker
Brand
Square D
SKU
PJA36120
Quantity
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Square D PJA36120 - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D PJA36120 - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | PJA36120 |
| Series | PJA |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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 | Fixed Thermal, Adjustable Magnetic |
| Trip Unit Model | ET 1.0I |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated |
Quantity
Square D PJA36120 - 1200A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | PJA36120 |
| Series | PJA |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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 | Fixed Thermal, Adjustable Magnetic |
| Trip Unit Model | ET 1.0I |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated |
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Description
The PJA36120 is a 3-pole, 1200A molded case circuit breaker from Square D's PowerPacT P-Frame family. Engineered for heavy-duty commercial power distribution, it features an electronic trip unit with fixed long-time and adjustable magnetic settings. This breaker installs into Square D I-Line panelboards and switchboards, utilizing an I-Line plug-on connection. It serves as a replacement for legacy MA36120 and MH36120 breakers. Rated at 65 kAIC at 480VAC, it includes true RMS sensing.Specifications
| Brand | Square D |
|---|---|
| Part Number | PJA36120 |
| Series | PJA |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| 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 | Fixed Thermal, Adjustable Magnetic |
| Trip Unit Model | ET 1.0I |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, 80% Rated |
Product FAQs
8 answersWhat types of enclosures are compatible with the PJA36120 circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It requires sufficient P-frame mounting space and is not compatible with standard unit-mount or drawout enclosures.
How does the PJA36120 connect to the panelboard bus?
The breaker features a plug-on jaw connection on the line side that engages directly with the I-Line bus stack. It uses a mounting bracket to secure the device to the backpan, eliminating the need for line-side wiring.
Does this breaker require a separate line-side lug kit?
No. Because it utilizes an I-Line plug-on connection, there are no line-side wire terminations. Lugs are only required, and factory-installed, on the load side.
What specific trip unit comes installed on the PJA36120?
It is equipped with the Square D ET 1.0I basic electronic trip unit. This solid-state module provides fixed long-time overload protection and adjustable instantaneous short-circuit protection.
Is the PJA36120 rated for 100% continuous current operation?
No. This model carries a standard 80% continuous current rating. In accordance with standard electrical codes, it is designed to carry a maximum continuous load of 960 amps.
Can the basic trip unit on the PJA36120 be upgraded to a Micrologic trip unit?
No. While many PowerPacT P-frame breakers feature field-interchangeable Micrologic trip units, the ET 1.0I basic electronic trip unit equipped on this specific model is fixed and cannot be swapped out in the field.
What is the replacement catalog number for the load-side terminal lugs?
The standard mechanical lug kit pre-installed on the load side of the PJA36120 is catalog number AL1200P25K.
How can I manually test the mechanical tripping operation of the PJA36120?
The breaker features an integral push-to-trip button on the front cover. Pressing this button manually trips the device, providing a safe way to verify that the mechanical linkage and trip mechanism are functioning properly.
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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.