Square D PowerPacT J-Frame I-L...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,884.27
Square D PowerPacT J-Frame I-Line Thermal Magnetic Circuit Breaker

Square D PowerPacT J-Frame I-Line Thermal Magnetic Circuit Breaker

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Model: JDA262251

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

$1,884.27
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Square D PowerPacT J-Frame I-Line Thermal Magnetic Circuit Breaker, 600VAC

The Square D PowerPacT J-Frame I-Line Circuit Breaker delivers dependable overload and short-circuit protection for commercial and industrial electrical distribution systems. Available in 2-pole and 3-pole configurations with a thermal magnetic trip unit, this I-Line mounted breaker is rated 600VAC with a 14kA rating and continuous current up to 250A at 80% of frame capacity. Engineered to IEC 60947-2 standards, it mounts directly to I-Line panelboard bus systems for fast, tool-free installation on new builds and retrofits.

Key Features

  • Current Rating: Continuous current up to 250A, rated at 80% of frame capacity for demanding distribution circuits.
  • Pole Configuration: Available in 2-pole and 3-pole designs to match system requirements.
  • Thermal Magnetic Trip: Combined thermal and magnetic trip elements provide dependable overload and short-circuit protection.
  • I-Line Mounting: Bracket-mounted for direct connection to I-Line panelboard bus systems, simplifying installation.
  • Voltage Rating: Rated operational voltage (Ue) of 600VAC, 50/60 Hz, with rated insulation voltage (Ui) of 750V and rated impulse withstand voltage (Uimp) of 8kV.
  • Terminal Capacity: Accepts AWG 3/0 through 350 kcmil aluminum or copper conductors, tightened to 25 N.m torque.
  • Breaking Capacity: Ics rated at 18kA (380/440/415V AC) and 25kA (220/240V AC) per IEC 60947-2.
  • Enclosure Protection: Front cover rated IP40 for touch-safe operation.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • NOM Certified (NOM-003-SCFI-2000)
  • Complies with NEMA standards
  • IEC 60947-2 compliant, suitable for isolation

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Commercial and Industrial Electrical Distribution Panels
  • I-Line Panelboard Systems
  • Overcurrent and Short-Circuit Protection
  • Panelboard and Switchboard Retrofits
  • New Construction and Renovation Projects

Why Square D?

Square D engineers the PowerPacT J-Frame series for dependable, code-compliant circuit protection backed by UL, CSA, and NOM certifications. With robust thermal magnetic trip technology, IEC 60947-2 compliance including 18kA and 25kA breaking capacities, and an 18-month warranty, this I-Line breaker is built for the reliability that electricians, panel builders, and contractors demand on commercial and industrial jobs.

Manufacturer Resources

Product Specs

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

Square D JDA262251 – Frequently Asked Questions

1) Will a Square D PowerPacT J-Frame I-Line breaker bolt into an existing I-Line panelboard bus?
Yes. The PowerPacT J-Frame I-Line breaker is bracket-mounted to connect directly onto I-Line panelboard bus systems, so it goes in without separate mounting hardware on both new panels and retrofits. That bus-stab mounting is what makes it an I-Line device rather than a bolt-on or plug-in unit, and it is why it will not drop into a standard bolt-on panelboard interior.
2) What wire size can I land on a 250A PowerPacT J-Frame breaker, and what torque?
Terminals accept AWG 3/0 through 350 kcmil, aluminum or copper, torqued to 25 N.m. That range covers a 250A feeder in either metal, so you can size conductors to the ampacity table without adding a lug kit.
3) Is the PowerPacT J-Frame breaker rated for a 480V or 600V three-phase system?
Rated operational voltage is 600VAC at 50/60 Hz, so it covers 480Y/277 and 600V three-phase distribution. Rated insulation voltage is 750V with an 8kV impulse withstand. Interrupting rating is 14kA, which has to equal or exceed the available fault current at the point of installation.
4) Is the Square D J-Frame breaker UL Listed and acceptable for a code inspection?
It is UL Listed, CSA Certified, and NOM Certified to NOM-003-SCFI-2000, complies with NEMA standards, and is built to IEC 60947-2 including suitability for isolation. Breaking capacity Ics is 18kA at 380/440/415V AC and 25kA at 220/240V AC per IEC 60947-2.
5) Is the ABB A2A150TT a direct replacement for a Square D PowerPacT J-Frame I-Line breaker?
No. The ABB A2A150TT is an A2 Series 3-pole molded case circuit breaker, so it is a molded case device in ABB's own frame family rather than a Square D I-Line unit. The PowerPacT J-Frame breaker is bracket-mounted for direct connection to I-Line panelboard bus systems, and that bus connection is specific to the I-Line design. If the existing panel is an I-Line panelboard, stay with the J-Frame I-Line breaker; an ABB molded case breaker of this type would be used in an ABB enclosure or panel built for it.
6) What is the difference between the Square D PowerPacT J-Frame breaker and an Eaton BAB Quicklag three-pole breaker?
They sit at different ends of the distribution system. The Square D PowerPacT J-Frame I-Line breaker is rated 600VAC with continuous current up to 250A and is bracket-mounted to I-Line panelboard bus. The Eaton BAB Quicklag three-pole industrial thermal-magnetic breaker is a 240V device. For a 480V or 600V feeder or a main in an I-Line section, the J-Frame is the device sized for the job; the BAB Quicklag is used on branch circuits in 240V panels.
7) I need more than 250A in a three-pole molded case breaker. What else is there?
The Square D PowerPacT J-Frame I-Line breaker carries continuous current up to 250A. For a higher-ampere three-pole molded case device, the Eaton Series C K-Frame mining circuit breaker is a 400A 3-pole unit with an interchangeable rating plug. It is an Eaton frame rather than an I-Line breaker, so it does not mount to Square D I-Line panelboard bus; confirm the enclosure or panel it is going into before specifying it.
8) Does this come in 2-pole as well as 3-pole?
Both 2-pole and 3-pole configurations are built in the PowerPacT J-Frame I-Line thermal magnetic line. Specify pole count with the amperage when you order, since the pole count also sets how many bus phases the breaker stabs onto in the I-Line panel.
9) How much space does a J-Frame I-Line breaker take up in the panel?
The breaker measures 7.52 in high, 4.09 in wide, and 3.39 in deep. Use the depth figure when checking gutter and cover clearance in a shallow panelboard or switchboard section.
10) Thermal magnetic or electronic trip unit for a 250A feeder breaker?
This J-Frame uses a thermal magnetic trip unit, combining a thermal element for overload and a magnetic element for short circuit. That is the straightforward choice for a fixed feeder where you do not need adjustable long-time, short-time, or ground-fault settings. If the job calls for selective coordination with adjustable pickup and delay bands, an electronic trip unit is the one to spec instead.
11) What are alternatives to the Square D J-Frame if my panel is not I-Line?
An I-Line breaker only fits Square D I-Line bus. For a non-I-Line molded case application ZenSupply carries the ABB A2A150TT from the A2 Series and the ABB XT4 and XT5 three-pole breaker kits (MBB33 and MBM334). For much smaller branch circuits the Eaton BAB Quicklag bolt-on thermal-magnetic breakers, including the three-pole 240V BAB-302, are a different class of device entirely and are not a substitute for a 250A feeder breaker.
12) Which J-Frame part number do I order for a 200A motor feeder versus a straight 250A feeder?
For 200A, order JDA262001; for 225A, JDA262251; for a standard 250A application, JDA262502. The 200A and 225A versions share the same frame rating band, so the difference between them is the trip rating, not the physical envelope.
13) If I need a bolt-on branch breaker instead of an I-Line unit, what Eaton option is there?
The Eaton BAB Series Quicklag thermal-magnetic circuit breaker is a bolt-on design, which attaches to the panel bus with a screw rather than plugging onto an I-Line bus stack. The Square D PowerPacT J-Frame I-Line breaker is bracket-mounted for direct connection to I-Line panelboard bus and carries up to 250A at 600VAC, so it is the feeder-class device. Use the bolt-on Eaton BAB where the panel interior is built for bolt-on branch breakers.
14) Does the Eaton 10250T undervoltage release work with the PowerPacT J-Frame breaker?
No. The Eaton 10250T-GR is an undervoltage release for Eaton NZM Series molded case circuit breakers, so it is matched to the NZM frame. The Square D PowerPacT J-Frame I-Line breaker is a Square D PowerPacT J-Frame device, and internal accessories must be the ones built for that frame. Order J-Frame accessories by the Square D frame designation rather than substituting an Eaton release.
15) Is the front of this breaker touch safe for a panel builder?
The front cover carries an IP40 rating, which keeps fingers and objects above 1 mm out of the live parts during operation. That is a cover rating only, not an enclosure rating for the installation, so the panelboard or switchboard enclosure still has to suit the environment.
How fast can I get the Square D JDA262251 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 JDA262251 come with a warranty?
Absolutely. The Square D JDA262251 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 JDA262251?
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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