Square D PJA PowerPacT P-Frame...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$28,831.94
Square D PJA PowerPacT P-Frame I-Line Circuit Breaker, 3-Pole, 600VAC

Square D PJA PowerPacT P-Frame I-Line Circuit Breaker, 3-Pole, 600VAC

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Model: PJA36120

In Stock (leaves warehouse same day if ordered before 3pm ET)

$28,831.94
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Square D PJA PowerPacT P-Frame I-Line Circuit Breaker, 3-Pole, 600VAC

The Square D PJA PowerPacT P-Frame I-Line circuit breaker is engineered to protect electrical distribution systems from damage caused by overloads and short circuits. This 3-pole, 600VAC breaker features the ET1.0I electronic long-time trip unit, an 80%-rated I-Line connection, and a 25kA short-circuit rating for demanding commercial and industrial panelboards. This model is offered in Motor FLA ratings from 1000A up to 1200A, allowing the correct breaker to be matched to the connected motor load while sharing the same frame, trip technology, and I-Line mounting platform. Rated to 600 V AC, 50/60 Hz per UL 489 and HACR rated, it is built for dependable overcurrent protection in distribution equipment.

Key Features

  • Configuration: 3-pole design for three-phase distribution circuits.
  • Motor FLA Range: Available in 1000A and 1200A ratings to match motor load requirements.
  • Trip Unit Technology: Electronic, basic ET 1.0I long-time trip unit for reliable overcurrent detection.
  • I-Line Connection: I-Line bracket mounting with I-Line line-side connection and load-side lugs for simplified busway installation; accepts 4 x AWG 3/0...500 kcmil aluminum/copper conductors.
  • Voltage Rating: 600 V AC, 50/60 Hz per UL 489; rated insulation voltage (Ui) of 750V and rated impulse withstand voltage (Uimp) of 8 kV per IEC 60947-2.
  • Short-Circuit Rating: 25 kA at 380/415 V AC and 35 kA at 240 V AC per IEC 60947-2 (Ics).
  • Ingress Protection: IP40 degree of protection on the front cover.
  • Local Signaling: Integrated green trip indicator for local status verification.
  • HACR Rated: Suitable for heating, air conditioning, and refrigeration equipment circuits.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • NOM Certified
  • Complies with IEC 60947-2
  • Meets NEMA and NOM-003-SCFI-2000 standards
  • CE Quality Label

Technical Specifications

  • Warranty Period: 18 months
  • Poles Description: 3P
  • Serviceability: Yes
  • Removable Battery: YES
  • Quality Labels: CE
  • Mercury Free: Yes

Typical Applications

  • Commercial and Industrial Distribution Panelboards
  • I-Line Busway Systems
  • Main Panel Disconnect for Control Panels
  • HACR-Rated Heating and Cooling Circuits
  • Motor Circuit Protection at Matched FLA Ratings
  • Renovation and New Construction Electrical Projects

Why Square D?

Square D engineers the PowerPacT P-Frame line for reliable, code-compliant overcurrent protection in demanding commercial and industrial environments. Backed by UL, CSA, and NOM certifications plus IEC 60947-2 compliance and an 18-month warranty, this circuit breaker delivers dependable performance across its full range of Motor FLA ratings for distribution equipment and control panel applications.

Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Series:
PowerPacT P
Configuration:
3-Pole
Voltage Rating:
600V
Connection Type:
I-Line
Listing:
UL Listed
Standards:
IEC 60947-2
Department:
Electrical
Product Group:
Circuit Protection
Amperage Rating:
1000A - 1200A
Product Subgroup:
Circuit Breakers
Product Width:
8.27 in
Product Depth:
8.05 in
Product Height:
16.16 in

Square D PJA36120 – Frequently Asked Questions

1) Will the Square D PJA breaker mount in an existing I-Line panelboard?
Yes. The PJA PowerPacT P-Frame uses an I-Line bracket mount with an I-Line line-side connection, so it plugs onto the I-Line bus stabs in a Square D I-Line panelboard or busway. The load side is lugs, not bus, and those lugs accept 4 conductors per pole of AWG 3/0 through 500 kcmil aluminum or copper. Physical envelope is 16.16 in high, 8.27 in wide, 8.05 in deep, so confirm the panel interior has that space.
2) What is the difference between the PJA36100 and PJA36120?
Only the Motor FLA rating. PJA36100 is the 1000A unit and PJA36120 is the 1200A unit. Both are 3-pole, 600VAC, I-Line mounted, and both use the same ET1.0I electronic long-time trip unit and the same P-Frame body, so the choice comes down to matching the connected motor full load amps.
3) Can I use a PJA P-Frame breaker on a 480V three-phase feeder?
Yes. The PJA is rated 600 V AC, 50/60 Hz per UL 489, which covers 480Y/277 and 480 delta systems. Rated insulation voltage is 750V with an 8 kV impulse withstand per IEC 60947-2. Note the I-Line connection is 80% rated, so size the breaker for continuous load accordingly.
4) What is the interrupting rating on the Square D PJA, and is 25kA enough for my service?
The PJA carries a 25 kA short-circuit rating, stated as 25 kA at 380/415 V AC and 35 kA at 240 V AC per IEC 60947-2 (Ics). Compare that against the available fault current at the panelboard from your utility or coordination study; if your calculated fault current at that bus exceeds the applicable rating, you need a higher-interrupting P-Frame variant instead.
5) Does the ET1.0I trip unit give me adjustable short-time or ground fault protection?
No. The PJA uses the basic electronic ET 1.0I trip unit, which is a long-time function only for overcurrent detection. If your coordination study calls for adjustable short-time, instantaneous, or ground fault pickup, you need a higher trip unit in the PowerPacT P-Frame family rather than the ET 1.0I version.
6) Can an ABB A2A150TT molded case breaker be used in place of a Square D PJA P-Frame breaker?
No. The Square D PJA uses an I-Line connection type, which mounts to a Square D I-Line bus stab in the panelboard rather than bolting to a generic interior. The ABB A2A150TT is an A2 Series 3-pole molded case breaker and does not share the I-Line mounting platform, so it cannot land on an I-Line bus. If the existing equipment is an I-Line panelboard or busway, the breaker has to be an I-Line breaker such as the PJA, which is offered at 1000A and 1200A motor FLA ratings.
7) What should I use for a smaller branch circuit instead of a Square D PJA P-Frame breaker?
The PJA is a large-frame device covering 1000A to 1200A motor FLA at 600V AC, so it is sized for main and feeder duty rather than branch circuits. For small branch breakers in a panelboard, a bolt-on miniature-style unit such as the Eaton BAB1010 Quicklag thermal-magnetic bolt-on breaker or the Eaton BAB-302 three-pole Quicklag rated 240V covers that role. Note the BAB-302 is a 240V device, so it is not a candidate anywhere the PJA's 600V rating is required.
8) Is the ABB ST200M miniature circuit breaker a substitute for the Square D PJA?
No, they serve different purposes. The ABB ST200M is a C-curve miniature circuit breaker listed to UL 1077, which is a supplementary protector standard. The Square D PJA is UL Listed to UL 489 as a branch and feeder overcurrent device, rated 600V AC and offered at 1000A to 1200A motor FLA. Where code requires a UL 489 branch circuit breaker, a UL 1077 supplementary protector cannot take its place.
9) Is the PJA breaker approved for HVAC and refrigeration equipment circuits?
Yes, it is HACR rated, so it can be applied on heating, air conditioning, and refrigeration equipment branch circuits where the equipment nameplate calls for an HACR type breaker. It is also UL Listed, CSA Certified, and NOM Certified, and complies with IEC 60947-2.
10) What else does ZenSupply carry if I need a 3-pole molded case breaker that is not I-Line?
The PJA only fits I-Line bus. For bolt-on or terminal-connected 3-pole molded case applications, ZenSupply carries the ABB A2A150TT in the A2 Series, the ABB XT4 and XT5 3-pole breaker kits, the Eaton Series C K-Frame mining breaker (400A, 3-pole, with interchangeable rating plug), and the Eaton BAB Quicklag 3-pole thermal-magnetic breaker rated 240V. The BAB Quicklag is a much smaller-frame panelboard breaker, not a substitute for a 1000A to 1200A feeder device.
11) Is an ABB XT4 or XT5 3-pole breaker kit an equivalent to the Square D PJA?
They are different platforms. The ABB MBB33 is an XT4 Series 3-pole molded case breaker kit and the MBM334 is an XT5 3-pole breaker kit, both ABB frames with ABB mounting hardware. The Square D PJA is a PowerPacT P-Frame breaker with an I-Line bracket and I-Line line-side connection, rated 600V AC and carrying a 25 kA short-circuit rating at 380/415V AC. For a Square D I-Line panelboard the PJA stays within the same frame and mounting platform; the ABB kits would require ABB distribution equipment.
12) I need a 3-pole breaker with an interchangeable rating plug instead of the PJA's fixed trip unit. What is an alternative?
The Square D PJA carries the electronic ET 1.0I basic long-time trip unit and is ordered at a set motor FLA rating of either 1000A or 1200A. If the job calls for a frame where the trip setting is changed by swapping a plug, the Eaton 6602C72G67 Series C K-Frame mining circuit breaker is a 400A 3-pole unit with an interchangeable rating plug. It is a smaller frame at 400A and is a Series C K-Frame rather than an I-Line device, so verify the panelboard mounting before specifying it.
13) Will a Bussmann CBC or CBF automotive circuit breaker work in my I-Line panelboard?
No. The Bussmann CBC Series is a Type I automotive circuit breaker rated 14VDC, and the CBF Series is a Type II automotive breaker; the CBC-B adds a waterproof stud terminal for vehicle wiring. These are low-voltage DC vehicle and equipment devices. The Square D PJA is a 600V AC, 3-pole I-Line breaker for commercial and industrial panelboards and busway, so none of the Bussmann automotive breakers are interchangeable with it.
14) How do I tell if a PJA P-Frame breaker has tripped without opening the panel?
It has an integrated green trip indicator on the front for local status verification. The front cover is also IP40 rated, so the indicator stays readable with the cover in place.
15) Can the PJA breaker be used as the main disconnect in a control panel?
Yes, it is applied as a main panel disconnect in control panels as well as in commercial and industrial distribution panelboards and I-Line busway systems, provided the enclosure accepts the I-Line mounting and the 16.16 x 8.27 x 8.05 inch body.
16) Does the Eaton 10250T-GR undervoltage release work with the Square D PJA breaker?
The Eaton 10250T-GR is an undervoltage release accessory for Eaton NZM Series molded case circuit breakers. The Square D PJA is a PowerPacT P-Frame I-Line breaker and takes Square D P-Frame accessories, so an NZM-series release is not a match. The PJA itself is serviceable and includes an integrated green trip indicator for local status verification.
17) Where is the Square D PJA breaker made?
The PJA PowerPacT P-Frame is manufactured in Mexico, and it carries NOM-003-SCFI-2000 and NOM certification along with UL, CSA, NEMA, and the CE quality label, which matters on projects with country-of-origin or multi-market documentation requirements.
How fast can I get the Square D PJA36120 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D PJA36120 come with a warranty?
Absolutely. The Square D PJA36120 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D PJA36120?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D PJA36120 from ZenSupply?
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