Square D PowerPacT J Circuit B...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,804.54
Square D PowerPacT J Circuit Breaker, 250A, 3-Pole, 600VAC, I-Line, MicroLogic 3.2S

Square D PowerPacT J Circuit Breaker, 250A, 3-Pole, 600VAC, I-Line, MicroLogic 3.2S

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Model: JDA36250U33X

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

$2,804.54
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Square D PowerPacT J Circuit Breaker, 250A, 3-Pole, 600VAC, I-Line, MicroLogic 3.2S

The Square D PowerPacT J-Frame circuit breaker is engineered to protect electrical systems from damage caused by overloads and short circuits. This unit is rated 250A, 3-pole, 600VAC, with a 14kA interrupt rating, an I-Line electrical connection, and an 80% continuous current rating. It features the MicroLogic 3.2S electronic trip unit (LSI, standard function) for reliable overcurrent protection, and is built for commercial and industrial electrical distribution applications.

Key Features

  • Amperage Rating: 250A rated for reliable overcurrent protection in demanding electrical distribution systems.
  • Pole Configuration: 3-pole (3P) design for three-phase electrical systems.
  • Voltage Rating: 600VAC rated operational voltage (Ue), 50/60 Hz, per IEC 60947-3.
  • Interrupt Rating: 14kA breaking capacity for dependable short-circuit protection.
  • Trip Unit Technology: MicroLogic 3.2 S electronic trip unit, standard function, LSI (long time / short time / instantaneous) protection.
  • Electrical Connection: I-Line connection on the line side with lugs on the load side for versatile panelboard mounting.
  • Continuous Current Rating: 80% rated for standard continuous-duty applications.
  • Wire Range: AWG 3/0...350 kcmil aluminum/copper terminals for flexible conductor sizing.

Certifications & Compliance

  • UL Listed
  • cULus
  • CSA Certified
  • NOM Certified
  • Rated per IEC 60947-2
  • NEMA Standards

Technical Specifications

  • Warranty: 18 months
  • Warranty Period: 18 months
  • Sustainable Packaging: No
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: No
  • Poles Description: 3P
  • Serviceability: Yes
  • With Recycled Cardboard: Yes
  • Terminal Identifier: AL250JD
  • Long Time Pick Up Adjustment Range: 0.25...1 x In
  • Wire Stripping Length: 25 mm

Typical Applications

  • Commercial and Industrial Electrical Distribution
  • Panelboard and I-Line Switchboard Installations
  • Overload and Short-Circuit Protection
  • Three-Phase Power Distribution Systems
  • New Construction and Panel Retrofits

Why Square D?

Square D PowerPacT J-Frame breakers combine MicroLogic electronic trip technology with UL Listed, CSA, and NOM certified construction for dependable, code-compliant performance. With a rated 14kA interrupt capacity, I-Line connectivity, and a wide AWG 3/0...350 kcmil terminal range, these breakers deliver the reliability electrical professionals need for demanding commercial and industrial distribution systems.

Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Voltage Rating:
600VAC
Amperage Rating:
250A
Configuration:
3-Pole
Connection Type:
I-Line
Listing:
UL Listed
Standards:
IEC 60947-2
Series:
PowerPacT J
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers
Country of Origin:
Mexico
Product Depth:
3.39 in
Product Width:
4.09 in
Product Height:
7.52 in

Square D JDA36250U33X – Frequently Asked Questions

1) Will the Square D JDA36250U33X bolt into an existing I-Line panelboard or switchboard?
Yes. The PowerPacT J-Frame JDA36250U33X uses an I-Line connection on the line side, so it plugs onto the I-Line bus stabs in a Square D I-Line panelboard or switchboard. The load side is lug-terminated rather than bussed, so you land conductors directly on the breaker. Breaker body measures 7.52 in high, 4.09 in wide, 3.39 in deep, which is what you need to check against available vertical bus space in the section.
2) What wire size can I land on the lugs of this 250A PowerPacT J breaker?
The load-side lugs take AWG 3/0 through 350 kcmil, aluminum or copper, so you can feed it with a single conductor per phase in that range. Strip length is 25 mm. The terminal identifier is AL250JD if you need to order replacement or spare lugs.
3) Is 14kA interrupting capacity enough for my service, or do I need a higher AIC breaker?
The JDA36250U33X is a 14kA breaking capacity device at its 600VAC rating. That works where the available fault current at the breaker's point of application is below 14kA, which is common on smaller services and downstream distribution. If your short-circuit study shows more than 14kA at that bus, this is the wrong interrupting rating and you need a higher-AIC J-Frame or a series-rated arrangement. Check the calculated fault current before you specify it.
4) Can I load this 250A breaker to its full 250 amps continuously?
No. It carries an 80% continuous current rating, so the maximum continuous load is 200A on a 250A frame. Size the feeder and the load accordingly, or step up to a larger frame if you genuinely need 250A continuous.
5) What does the MicroLogic 3.2S trip unit do, and is it adjustable?
MicroLogic 3.2S is an electronic trip unit with LSI protection: long time, short time, and instantaneous. Long time pickup adjusts over 0.25 to 1 x In, so on a 250A sensor that gives a settable pickup from roughly 62.5A to 250A, letting one breaker be field-tuned to the actual load instead of swapping frames. It is the standard-function version, not the ammeter or energy-metering variant.
6) I need a 250A 3-pole breaker but my panel is not I-Line. Can I still use the JDA36250U33X?
No. The line side of this one is an I-Line plug-on connection, which only mates with Square D I-Line vertical bus. For a non-I-Line enclosure or a unit-mount application you need a lug-in/lug-out or bolt-on J-Frame instead, or a different molded case breaker such as an ABB XT5 3-pole or the ABB A2A150TT. Confirm the mounting style matches the gear before ordering.
7) We need a three-pole molded case breaker but not for I-Line gear. What are the alternatives to the Square D JDA36250U33X?
For non-I-Line installations, three-pole molded case options include the ABB XT4 Series 3-pole molded case breaker kit (ABB-MBB33), the ABB XT5 3-pole breaker kit (ABB-MBM334), and the ABB A2A150TT A2 Series 3-pole molded case breaker. The Square D PowerPacT J JDA36250U33X stays the choice when the enclosure is Square D I-Line, because its line side connects directly to the I-Line bus rather than to lugs or a panel interior.
8) Can I use an Eaton BAB three-pole breaker instead of the Square D PowerPacT J 250A?
They are not interchangeable classes of device. The Eaton BAB-302 Quicklag is a three-pole thermal-magnetic branch breaker rated 240V, and the BAB1010 is a bolt-on thermal-magnetic Quicklag unit. The Square D JDA36250U33X PowerPacT J is a 250A 3-pole breaker rated 600VAC with a MicroLogic 3.2S electronic trip unit providing long time, short time and instantaneous protection and an adjustable long time pickup. Use the BAB units for lighting and small branch circuits in Eaton panels; use the PowerPacT J for 600V-class feeder and main duty on I-Line gear where adjustable electronic protection is specified.
9) I need more than 250A on a three-pole feeder. What should I look at instead?
The Square D JDA36250U33X PowerPacT J is a 250A frame, so a higher-amperage breaker is needed above that. The Eaton Series C K-Frame 6602C72G67 is a 400A 3-pole breaker with an interchangeable rating plug, which also lets the trip rating be changed in the field. Note that the PowerPacT J uses an I-Line line-side connection for Square D I-Line gear, so a change of breaker at higher amperage may also mean a change of enclosure or bus arrangement.
10) Will this breaker work on a 480V three-phase system?
Yes. Rated operational voltage is 600VAC at 50/60 Hz, so 480Y/277V and 480V delta systems are inside its rating, as is 240V. It is a 3-pole device built for three-phase distribution.
11) Is the Square D PowerPacT J UL Listed and acceptable for a commercial inspection?
It is UL Listed and cULus, plus CSA Certified and NOM Certified, and rated per IEC 60947-2. That covers US and Canadian installations and the breaker is built to NEMA standards for commercial and industrial distribution. Country of origin is Mexico.
12) How is an electronic-trip J-Frame breaker different from the thermal-magnetic breakers I usually buy?
The PowerPacT J with MicroLogic 3.2S trips electronically with separately adjustable long time, short time, and instantaneous settings, so you can coordinate it with upstream and downstream devices. A thermal-magnetic unit like the Eaton BAB Quicklag bolt-on is fixed-curve and non-adjustable, intended for branch circuits on a lighting or power panel rather than a 250A three-phase feeder. For large-frame adjustable protection, other options include the ABB A2A150TT A2N-series molded case breaker and the ABB XT5 3-pole breaker.
13) Does the Eaton 10250T-GR undervoltage release work with a Square D PowerPacT J breaker?
No. The Eaton 10250T-GR is an undervoltage release accessory for Eaton NZM Series molded case breakers, so it is matched to that frame. The Square D JDA36250U33X PowerPacT J is a complete 250A 3-pole 600VAC breaker with the MicroLogic 3.2S trip unit, and any internal accessory for it has to be a Square D PowerPacT J-frame item. Accessories between molded case breaker families are frame-specific and do not cross brands.
14) What is the difference between the ABB XT4 and XT5 breaker kits when comparing against the PowerPacT J 250A?
The ABB MBB33 is an XT4 Series 3-pole molded case breaker kit and the MBM334 is an XT5 3-pole breaker kit, two different frame sizes in the same ABB molded case family, with XT5 the larger frame. Either is a candidate where the gear accepts a lug or kit-mounted molded case breaker. The Square D JDA36250U33X PowerPacT J is a 250A 3-pole 600VAC breaker with an I-Line line-side connection and lugs on the load side, so it is the one to keep when the breaker has to plug onto Square D I-Line bus.
15) Is this breaker field-serviceable, and does it contain mercury?
The unit is listed as serviceable and is mercury free. Packaging uses recycled cardboard. If you are tracking sustainable packaging criteria, note that it is not packed as single-use-plastic-free.
How fast can I get the Square D JDA36250U33X delivered?
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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 JDA36250U33X come with a warranty?
Absolutely. The Square D JDA36250U33X 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 JDA36250U33X?
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
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