Square D PowerPacT J I-Line Ci...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5,157.63
Square D PowerPacT J I-Line Circuit Breaker with MicroLogic 3.2S Trip Unit

Square D PowerPacT J I-Line Circuit Breaker with MicroLogic 3.2S Trip Unit

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Model: JJA36250U33X

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

$5,157.63
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Square D PowerPacT J I-Line Circuit Breaker with MicroLogic 3.2S Trip Unit

The Square D PowerPacT J I-Line circuit breaker protects commercial and industrial power distribution systems from overloads and short circuits. This 3-pole unit is rated 600VAC with a 25kA interrupt rating and uses the MicroLogic 3.2S electronic trip unit for long-time, short-time, and instantaneous (LSI) protection. Built for I-Line panelboard mounting, it is UL Listed, CSA Certified, and rated to IEC 60947-2.

Key Features

  • Trip Unit: MicroLogic 3.2 S electronic trip unit with LSI (long-time, short-time, instantaneous) protection.
  • Electrical Rating: 600V AC operational voltage (Ue) at 50/60 Hz per IEC 60947-2, 750V insulation voltage (Ui), 8kV impulse withstand voltage (Uimp).
  • Interrupt Capacity: 25kA rated service breaking capacity, with the J-Frame platform rated up to 65kA at 220/240V AC and 35kA at 380/440/415V AC per IEC 60947-2.
  • Configuration: 3-pole design (PowerPacT J-Frame also available in 2-pole).
  • Continuous Current Rating: 80% rated continuous current.
  • Mounting & Connection: I-Line bracket mounting with I-Line line-side connection and load-side lugs, accepting AWG 3/0...350 kcmil aluminum/copper terminals at 25-25 N.m tightening torque.
  • Enclosure Protection: IP40 front cover rating.
  • Isolation: Suitable for isolation per IEC 60947-2.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • NOM Certified
  • IEC 60947-2, NEMA, NOM-003-SCFI-2000
  • RoHS Compliant with Exemptions
  • Mercury Free

Technical Specifications

  • Warranty: 18 months
  • Warranty Period: 18 months
  • Sustainable Packaging: No
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: Yes
  • Tier Id: 1
  • ROHS Eur In Scope: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • Poles Description: 3P
  • China ROHS Label: 7
  • Serviceability: Yes
  • With Recycled Cardboard: Yes
  • WEEE Product Category: 5
  • China ROHS In Scope: Yes
  • Return Indicator: Y
  • Utilisation Category: category A
  • Terminal Identifier: AL250JD
  • Take Back: No
  • Tier: 1
  • Returnability: Yes
  • Field Service Division: PPIBS
  • Long Time Pick Up Adjustment Range: 0.25...1 x In

Typical Applications

  • Commercial and Industrial Power Distribution
  • I-Line Panelboard and Switchboard Systems
  • Short-Circuit and Overload Protection
  • Motor and Feeder Circuit Protection
  • UL and CSA Listed Overcurrent Protection

Why Square D?

Square D engineers the PowerPacT J-Frame series for dependable, code-compliant circuit protection, backed by an 18-month warranty and a 15-year average life duration. With MicroLogic electronic trip technology and UL, CSA, and IEC 60947-2 certifications, this I-Line breaker suits demanding commercial and industrial installations.

Manufacturer Resources

Product Specs

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

Square D JJA36250U33X – Frequently Asked Questions

1) Will the Square D JJA36250U33X mount in an existing I-Line panelboard?
Yes. The PowerPacT J breaker JJA36250U33X uses I-Line bracket mounting with an I-Line line-side connection, so it plugs onto the I-Line bus stabs in a Square D I-Line panelboard or switchboard. The load side is lugs, not a bolt pad. Check your available vertical bus space against the breaker's 7.52 in height, 4.09 in width and 3.39 in depth before you commit.
2) What wire size can I land on this 250A Square D PowerPacT J breaker?
The load-side lugs accept AWG 3/0 through 350 kcmil, aluminum or copper, torqued to 25 N.m. That covers the usual parallel or single-conductor runs for a 250A feeder. The terminal is identified as AL250JD.
3) Is 25kA enough interrupting rating for my service, or do I need a higher AIC breaker?
The JJA36250U33X is rated 25kA service breaking capacity at 600V. If your available fault current at that point in the system exceeds 25kA at 600V, this breaker is the wrong choice and you need a higher-interrupting J-Frame. On the J-Frame platform the same breaker is rated up to 65kA at 220/240V AC and 35kA at 380/415/440V AC per IEC 60947-2, so the usable rating depends on your system voltage. Get the available fault current from your coordination study before ordering.
4) What does the MicroLogic 3.2S trip unit actually adjust, and will it do ground fault?
The MicroLogic 3.2S is an LSI unit: long-time, short-time and instantaneous protection, with a long-time pickup adjustable from 0.25 to 1 x In. On a 250A frame that puts the long-time setting range at roughly 62.5A to 250A, which is why one breaker can cover a range of feeder sizes. There is no ground-fault element in a 3.2S, so if your drawing calls for ground-fault protection you need a different MicroLogic unit.
5) What is the closest molded case alternative to the Square D JJA36250U33X from another manufacturer?
Among the molded case breakers that sit in the same general class, the ABB A2A150TT is a 3-pole molded case circuit breaker in ABB's A2 Series, and the ABB XT5 3-pole circuit breaker kit (MBM334) covers the larger XT frame. The Square D JJA36250U33X differs in two ways that decide the job: it is rated 250A at 600V, 3-pole, and it mounts with an I-Line bracket and I-Line line-side connection for I-Line panelboards and switchboards. The ABB units are individually mounted molded case frames, so they do not plug onto an I-Line bus. If the breaker is going into an I-Line panelboard, the I-Line connection is the deciding feature.
6) Can I use an Eaton Quicklag BAB breaker instead of a 250A PowerPacT J?
No. The Eaton BAB Quicklag three-pole industrial thermal-magnetic breaker is rated 240V, and the BAB1010 Quicklag is a bolt-on thermal-magnetic unit. The Square D JJA36250U33X is a 250A, 600V, 3-pole breaker with a MicroLogic 3.2S electronic trip unit providing long-time, short-time, and instantaneous protection, mounted on an I-Line bracket. The Quicklag breakers are branch-circuit devices for lighting and small power panels at 240V; they are not a feeder-class replacement at 600V and will not mount in an I-Line panelboard.
7) Is a miniature circuit breaker like the ABB ST200M a substitute for this PowerPacT J breaker?
No. The ABB ST200M is a miniature circuit breaker with a C-curve, listed to UL1077, which is a supplementary protection standard rather than a branch-circuit or feeder overcurrent listing. The Square D JJA36250U33X is a 250A, 600V, 3-pole UL Listed breaker built to IEC 60947-2 with a MicroLogic 3.2S electronic trip unit, intended for commercial and industrial power distribution and feeder protection. A UL1077 supplementary protector cannot stand in for a feeder overcurrent device.
8) Will a 600V 3-pole breaker work on a 480V or 208V three-phase system?
Yes. The 600VAC rating is a maximum, so this 3-pole unit is fine on 480Y/277, 480 delta or 208Y/120 three-phase systems. It is rated 600V operational at 50/60 Hz, with 750V insulation voltage and 8kV impulse withstand. Confirm the interrupting rating at your actual system voltage.
9) Does this breaker satisfy a spec calling for UL and CSA listed overcurrent protection and disconnect-rated isolation?
It is UL Listed, CSA Certified and NOM Certified, and built to IEC 60947-2, NEMA and NOM-003-SCFI-2000. It is also suitable for isolation per IEC 60947-2, meaning it can serve as the isolating means in the circuit. Front cover protection is IP40. It is RoHS compliant with exemptions and mercury free.
10) I need a 2-pole version of this PowerPacT J breaker, does it exist?
The JJA36250U33X is a 3-pole breaker. The PowerPacT J-Frame platform is also offered in 2-pole, so a 2-pole J-Frame is available as a separate catalog number rather than an option on this one.
11) What are the alternatives to a Square D PowerPacT J if I am not on an I-Line panelboard?
I-Line mounting ties this breaker to Square D I-Line gear. For a plain molded case feeder breaker in other enclosures, ABB's A2 Series (A2A150TT, 3-pole) or the ABB XT4 and XT5 3-pole breaker kits are molded case options, and Eaton's Series C K-Frame mining breaker is a 400A 3-pole with an interchangeable rating plug. Note none of those bolt onto an I-Line bus, so swapping platforms means changing how the breaker connects.
12) Is an electronic trip breaker like this worth it over a thermal-magnetic one for a feeder?
The difference is adjustability. An electronic MicroLogic 3.2S unit gives you adjustable long-time, short-time and instantaneous settings, so you can coordinate with downstream devices. A thermal-magnetic breaker such as the Eaton BAB Quicklag 3-pole 240V has fixed characteristics, which is fine for small branch circuits but leaves no room to tune selective coordination. For a 250A feeder in commercial or industrial distribution where a coordination study drives the settings, the electronic unit is what the study assumes.
13) If I need a 400A frame instead of 250A, what are my options?
The Square D JJA36250U33X is a 250A, 3-pole breaker on the PowerPacT J frame. For a larger frame, the Eaton Series C K-Frame mining circuit breaker (6602C72G67) is a 400A 3-pole unit with an interchangeable rating plug, and the ABB XT5 3-pole kit (MBM334) is the larger of ABB's XT frames. Note that the Eaton K-Frame is an individually mounted frame rather than an I-Line plug-on, so if the breaker has to land on an I-Line bus you would stay within the I-Line family and step up the frame size there.
14) I need an undervoltage release with my breaker - does the Eaton 10250T-GR fit this Square D unit?
No. The Eaton 10250T-GR is an undervoltage release for Eaton NZM Series molded case circuit breakers, so it is matched to that frame. The Square D JJA36250U33X is a PowerPacT J-Frame breaker with a MicroLogic 3.2S trip unit, and accessories for it have to be the J-Frame parts specified by Square D. Cross-brand internal accessories are not interchangeable between molded case frames.
15) Do I need the electronic trip unit, or would a thermal-magnetic breaker do the same job?
The Square D JJA36250U33X uses the MicroLogic 3.2S electronic trip unit for long-time, short-time, and instantaneous protection, with a long-time pickup adjustment range of 0.25 to 1 times In, which is what lets you set selective coordination across a distribution system. Thermal-magnetic alternatives such as the Eaton BAB Quicklag three-pole industrial breaker and the bolt-on BAB1010 use fixed thermal-magnetic elements instead. If your drawing calls out adjustable LSI settings or coordination study values, the electronic trip unit is the one that meets it; for a simple fixed-trip branch application the thermal-magnetic type covers it.
16) What is the difference between the ABB XT4 kit and this Square D J-Frame breaker for a feeder?
The ABB MBB33 is a 3-pole molded case circuit breaker kit on the XT4 series. The Square D JJA36250U33X is a 250A, 600V, 3-pole breaker on the PowerPacT J frame with a MicroLogic 3.2S electronic trip unit, I-Line bracket mounting, and load-side lugs accepting AWG 3/0 to 350 kcmil aluminum or copper at 25 N.m. The decision usually comes down to the enclosure: the Square D unit plugs onto an I-Line bus, while the ABB XT4 kit is for ABB panel and enclosure arrangements.
17) Can I use this Square D 250A breaker for motor circuit protection?
Yes, it is applied in motor and feeder circuit protection as well as general short-circuit and overload protection in commercial and industrial distribution. Utilisation category is category A. For motor loads, size the long-time pickup within the 0.25 to 1 x In range to the motor full-load current and set instantaneous to ride through inrush.
18) Will a Bussmann CBC or CBF circuit breaker work in my 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 CBS family is likewise automotive. Those are low-voltage DC devices for vehicle and equipment wiring. The Square D JJA36250U33X is a 250A, 600V AC, 3-pole breaker for I-Line panelboard and switchboard mounting. They are different product classes with no overlap in application.
19) Is the PowerPacT J breaker field serviceable, and where is it made?
Square D lists the JJA36250U33X as serviceable and returnable, handled by the PPIBS field service division, with a 15 year average life duration. Country of origin is Mexico.
How fast can I get the Square D JJA36250U33X 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 JJA36250U33X come with a warranty?
Absolutely. The Square D JJA36250U33X 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 JJA36250U33X?
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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