"Square D MGA PowerPacT M Circ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$8,755.33
"Square D MGA PowerPacT M Circuit Breaker, 3-Pole, 600VAC, 18kA"

"Square D MGA PowerPacT M Circuit Breaker, 3-Pole, 600VAC, 18kA"

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Model: MGA36800

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

$8,755.33
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Square D MGA PowerPacT M Circuit Breaker, 3-Pole, 600VAC, 18kA, I-Line

The Square D MGA PowerPacT M-Frame circuit breaker protects electrical distribution systems from damage caused by overloads and short circuits. This 3-pole, 600VAC unit features an I-Line connection with an electronic ET 1.0 basic trip unit, an 80% rating, and an 18kA interrupt capacity, making it suited for industrial and commercial distribution applications requiring HACR-rated performance. This listing covers the PowerPacT M breaker across its available Motor FLA ratings, from 300A up to 800A, so you can match the exact overload protection point your motor circuit requires while keeping the same 600VAC, 18kA, I-Line platform.

Key Features

  • Poles: 3-pole configuration for three-phase distribution circuits.
  • Voltage Rating: 600VAC, 50/60 Hz operational voltage per UL 489.
  • Interrupt Rating: 18kA short-circuit interrupt capacity for reliable fault protection.
  • Trip Unit Technology: Electronic, basic ET 1.0 trip unit with 80% rating (ABC).
  • Electrical Connection: I-Line connection on the line side with lugs on the load side for panelboard mounting.
  • Mounting Mode: I-Line bracket mounting for compatible Square D panelboards.
  • Application: HACR-rated for heating, air conditioning, and refrigeration circuit distribution.
  • Wire Range: 3 x AWG 3/0...3 x 500 kcmil aluminum/copper conductors accepted.
  • Motor FLA Range: Available in Motor FLA ratings from 300A to 800A to match specific motor overload protection requirements.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • NOM-003-SCFI-2000
  • Suitable for Isolation per IEC 60947-2
  • CE Quality Label

Technical Specifications

  • Warranty Period: 18 months
  • Sustainable Packaging: Yes
  • Poles Description: 3P
  • With Recycled Cardboard: Yes
  • Without Single Use Plastic: Yes
  • ROHS Exemption Information: Yes
  • Quality Labels: CE
  • Mercury Free: Yes
  • Standards: UL-CSA

Typical Applications

  • Industrial and Commercial Electrical Distribution
  • I-Line Panelboard Circuit Protection
  • HACR Equipment Circuit Protection
  • Motor Circuit Overload and Short-Circuit Protection
  • New Construction and Panelboard Retrofits

Why Square D?

Square D PowerPacT M-Frame breakers combine UL-listed, CSA-certified construction with an electronic ET 1.0 trip unit for dependable, code-compliant circuit protection across the full 300A-800A Motor FLA range. Backed by an 18-month warranty and built with sustainable, recycled packaging materials, this breaker delivers the reliability professional electricians expect for demanding industrial and commercial distribution systems.

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Manufacturer Resources

Product Specs

Product Type:
Circuit Breaker
Voltage Rating:
600V
Connection Type:
I-Line
Listing:
UL Listed
Standards:
UL-CSA
Department:
Electrical
Product Group:
Circuit Protection
Configuration:
3-Pole
Product Subgroup:
Circuit Breakers

Square D MGA36800 – Frequently Asked Questions

1) Will a Square D PowerPacT M-Frame MGA breaker bolt into any panelboard, or does it need an I-Line panel?
It needs an I-Line panelboard. The MGA is built with an I-Line connection on the line side and mounts on an I-Line bracket, so it plugs onto the phase bus of a compatible Square D I-Line panelboard. The load side lands on lugs. If your gear is a conventional bolt-on or plug-on branch panel, this frame will not mount in it.
2) What wire size can I land on the load-side lugs of the PowerPacT M 600V breaker?
The load-side lugs accept 3 x AWG 3/0 through 3 x 500 kcmil, aluminum or copper. That is three conductors per pole, so it is set up for parallel feeder runs on a large three-phase load rather than a single small conductor.
3) Is the Square D MGA breaker rated for a 480V or 600V three-phase system?
Both. The MGA M-Frame is rated 600VAC, 50/60 Hz per UL 489, which covers 480Y/277 and 600V three-phase distribution. It is a 3-pole device for three-phase circuits, with an 18kA interrupting rating, so your available fault current at the panel has to be at or below 18kA.
4) What is the difference between the MGA36800 and the MGA36800E10?
They are the same M-Frame, 3-pole, 600VAC, I-Line breaker; the difference is the current selection. The MGA36800 is the 800A version and the MGA36800E10 is set up for 300A. Pick by the motor full-load amps or feeder ampacity you are protecting, then confirm your I-Line panel bus can take the frame.
5) My available fault current is above 18kA. Can I still use this breaker?
No, not on its own. The MGA M-Frame is rated 18kA interrupting, so it cannot be applied where available short-circuit current at its terminals exceeds that. You need a higher interrupting frame or a series-rated combination documented for the gear. Do not install an 18kA device on a bus with more fault current available.
6) Can an ABB A2N molded case breaker be used in place of a Square D PowerPacT M I-Line breaker?
Not directly. The Square D PowerPacT M breaker uses an I-Line connection on the line side, which is a bracket-and-stab interface made for Square D I-Line panelboards. The ABB A2A150TT is an A2 Series 3-pole molded case circuit breaker, UL listed, and is a conventional molded case unit rather than an I-Line plug-on device. If the existing panelboard is an I-Line interior, stay with the I-Line breaker; the ABB A2 Series would be the choice in an enclosure or panel built for a bolt-on molded case breaker.
7) Is an ABB ST200M miniature circuit breaker a substitute for the Square D PowerPacT M?
No. The ABB ST200M is a miniature circuit breaker built to UL 1077, which is a supplementary protector standard. The Square D PowerPacT M is a 600VAC, UL Listed, CSA certified branch and feeder device rated 18kA interrupting with an I-Line connection for panelboard mounting. A UL 1077 supplementary protector cannot take the place of a UL 489 branch circuit breaker in a distribution panel, so the two are not interchangeable even where the ampere numbers appear close.
8) Can I use the PowerPacT M breaker to feed rooftop HVAC and refrigeration equipment?
Yes. The breaker is HACR rated, which is what lets it serve heating, air conditioning and refrigeration equipment circuits. Combined with the 600VAC rating and 3-pole build, it is a normal choice for feeding three-phase rooftop units and compressor racks from an I-Line distribution panel.
9) What does the 80% rating on this Square D breaker mean for how much load I can put on it?
An 80 percent rating means continuous load must not exceed 80 percent of the breaker's ampere rating. On the 800A MGA36800, that is 640A of continuous load. Only breakers specifically marked 100 percent rated may be loaded to their full nameplate continuously, and this one is marked 80 percent (ABC).
10) Does this PowerPacT M breaker have an electronic trip unit or a thermal magnetic one?
Electronic. It carries the ET 1.0 basic electronic trip unit rather than a thermal magnetic element. If you specifically want a thermal magnetic 3-pole molded case device, the ABB E150 Series is that type.
11) Is the Square D MGA breaker acceptable as a service disconnect for isolation?
It is marked suitable for isolation per IEC 60947-2, and it is UL Listed and CSA Certified, with NOM-003-SCFI-2000 compliance and a CE quality label. Those are the marks a facility or plant electrical inspector typically looks for on an industrial distribution breaker.
12) What are the alternatives if I do not have an I-Line panelboard?
The I-Line connection is what ties this Square D M-Frame to Square D I-Line gear. For a 3-pole molded case breaker in other gear, ZenSupply carries the ABB A2N Series (A2 Series) and the ABB XT4 Series 3-pole kit. For small control or supplementary protection on a DIN rail instead of a distribution bus, the ABB ST200M is a UL1077 miniature breaker, which is a supplementary device rather than a branch circuit breaker like the PowerPacT M.
13) What is the difference between a Square D PowerPacT M breaker and an ABB E150 thermal magnetic breaker?
The trip technology is the main split. The PowerPacT M unit carries an electronic ET 1.0 basic trip unit with an 80 percent rating, which gives electronic sensing of overload and short circuit. The ABB TEB is an E150 Series 3-pole thermal magnetic circuit breaker, using a bimetal and magnetic element instead of electronics. Specifiers who need electronic trip behavior on a three-phase feeder go to the PowerPacT M; a straightforward thermal magnetic feeder breaker is where the E150 fits.
14) How does the ABB XT4 breaker kit compare with the Square D PowerPacT M for a three-phase feeder?
Both are 3-pole devices for three-phase circuits. The ABB MBB33 is an XT4 Series 3-pole molded case circuit breaker kit, sold as a kit assembly. The Square D PowerPacT M ships as a 3-pole breaker with an I-Line line-side connection and load-side lugs accepting 3 x AWG 3/0 through 3 x 500 kcmil aluminum or copper conductors, and it is HACR rated for heating, air conditioning and refrigeration circuits. If the conductor range and the I-Line panelboard interface are what the job calls for, the PowerPacT M is the match; the XT4 kit suits an ABB-based enclosure build.
15) Does this breaker ship in plastic-free packaging for a LEED or sustainability spec?
Packaging is recycled cardboard with no single-use plastic, and the product is mercury free with ROHS exemption information provided. That is usually enough documentation for a green purchasing or sustainable procurement requirement on electrical distribution gear.
How fast can I get the Square D MGA36800 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 MGA36800 come with a warranty?
Absolutely. The Square D MGA36800 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 MGA36800?
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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