ABB XT1N 125 3-Pole Molded Cas...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,886.16
ABB XT1N 125 3-Pole Molded Case Circuit Breaker, TMF 30-500A Trip, Fixed Front

ABB XT1N 125 3-Pole Molded Case Circuit Breaker, TMF 30-500A Trip, Fixed Front

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Model: XT1NU3030AFF000XXX

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

$1,886.16
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ABB XT1N 125 3-Pole Molded Case Circuit Breaker, TMF 30-500A Trip, Fixed Front

The ABB XT1N 125 is a molded case circuit breaker engineered for dependable overcurrent protection in commercial and industrial electrical systems. This 3-pole (3P), fixed front (FF) breaker features a TMF thermal-magnetic trip unit with an adjustable 30-500 trip range, giving electricians flexibility to calibrate protection to the specific load on the circuit. Listed to UL/CSA standards, the XT1N 125 is built for code-compliant performance in panelboards, switchboards, and motor control applications where reliable, field-adjustable circuit protection is required.

Key Features

  • 125 Frame Rating: Rated for 125A frame applications, suited for mid-range branch and feeder circuit protection.
  • TMF Thermal-Magnetic Trip: Adjustable 30-500 trip range allows field calibration to match load and protection requirements without swapping breakers.
  • 3-Pole Configuration: Three-pole (3P) design for balanced protection across three-phase circuits.
  • Fixed Front (FF) Design: Fixed front cover configuration for standard panel and switchboard mounting.
  • UL/CSA Listed: Certified to UL and CSA standards, supporting code-compliant installations across North America.
  • Single-Unit Packaging: Packaged 1 ea per unit for straightforward stocking, inventory tracking, and replacement.

Certifications & Compliance

  • UL Listed
  • CSA Certified

Technical Specifications

  • Trip Unit: TMF Thermal-Magnetic, 30-500 Adjustable Trip Range
  • Poles: 3P
  • Front Configuration: Fixed Front (FF)
  • Listing: UL/CSA
  • Country of Origin: UKN
  • Packaging: 1 ea

Typical Applications

  • Commercial and Industrial Panelboards
  • Feeder and Branch Circuit Protection
  • Switchboards and Motor Control Centers
  • Three-Phase Electrical Distribution Systems
  • New Construction and Electrical Retrofit Projects

Why ABB?

ABB is a recognized manufacturer of electrical protection equipment, and the XT1N series molded case circuit breakers are built for reliable, code-compliant overcurrent protection. With a TMF thermal-magnetic trip unit, adjustable 30-500 trip range, 3-pole fixed front construction, and UL/CSA listing, the XT1N 125 delivers the dependable performance electrical professionals expect for demanding commercial and industrial installations.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Circuit Breaker
Amperage Rating:
125A Frame / 30-500A Trip
Configuration:
3-Pole Fixed Front
Standards:
UL/CSA
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers

ABB XT1NU3030AFF000XXX – Frequently Asked Questions

1) What does the 125 frame rating on the ABB XT1N mean when the trip is adjustable 30-500A?
The frame is the physical breaker size and the maximum current-carrying platform; the trip unit is what actually determines the protection setting. The ABB XT1N is a 125A frame with a TMF thermal-magnetic trip unit carrying an adjustable 30-500 trip range, so you set the trip to suit the load on the circuit without changing the breaker itself. Size your conductors and the overcurrent setting to the load, not to the frame number.
2) Is the ABB XT1N molded case breaker suitable for three-phase feeder protection?
Yes. It is a 3-pole fixed front configuration, which gives you protection on all three phases of a three-phase circuit from one device. The description calls out panelboards, switchboards, feeder and branch circuits, and motor control applications. If you need single-phase or a single-circuit DIN rail device instead, that is a different product class entirely.
3) Is the ABB XT1N circuit breaker UL listed and CSA certified for North American installations?
Yes. The XT1N carries a UL/CSA listing, which is what an inspector will look for on a commercial or industrial installation in the US or Canada. That covers the code-compliance side for panelboard, switchboard, and motor control center use.
4) How does the ABB XT1N compare to a Square D PowerPacT B breaker?
Both are thermal-magnetic molded case breakers for commercial and industrial distribution. ZenSupply carries the Square D PowerPacT B Thermal Magnetic Circuit Breaker as the comparable Square D molded case line, and the PowerPacT Q I-Line breaker where the panel uses Square D I-Line bus mounting. The choice usually comes down to what gear you are working in: I-Line panelboards take I-Line breakers, and mixing manufacturers in listed gear generally is not permitted. If the equipment is ABB, stay with the XT1N.
5) Do I need a molded case breaker like the XT1N, or will a DIN rail miniature circuit breaker do the job?
Molded case breakers like the ABB XT1N cover the 125A frame range and bolt into panelboards and switchboards for feeder and branch protection on three-phase systems. A miniature circuit breaker is a much smaller device on a DIN rail, typically for control circuits and light branch loads. ZenSupply stocks the Square D Multi9 C60 and the Square D C60 UL489 DIN rail MCB for that side. If you are protecting a three-phase feeder or a motor circuit at panel scale, the XT1N frame is what you want.
6) Can an electrician adjust the trip setting on the XT1N in the field, or is it fixed?
It is adjustable. The TMF thermal-magnetic trip unit has a 30-500 adjustable trip range, so the setting can be calibrated in the field to the load on that circuit rather than swapping in a different breaker. That matters on retrofit work where load has changed and on motor circuits that need the magnetic element tuned to inrush.
7) What is the closest thermal-magnetic molded case breaker to the ABB XT1N 125 if I need another brand?
The Square D PowerPacT B thermal magnetic circuit breaker is the nearest equivalent in type. Both are molded case breakers with thermal-magnetic trip units, so both protect feeder and branch circuits the same way the XT1N 125 does with its TMF thermal-magnetic trip. Confirm frame amperage, interrupting rating and terminal arrangement against the panel schedule before substituting, since the mounting and connection details differ between manufacturers.
8) Can I use a DIN rail miniature breaker instead of the ABB XT1N 125 3-pole?
Only for much smaller loads and a different mounting method. The Square D C60 UL489 miniature circuit breaker is DIN rail mount, which suits control panels and small branch circuits, while the XT1N 125 is a 3-pole fixed front molded case breaker sized for a 125A frame with a 30-500A trip range and bolted panelboard or switchboard mounting. An MCB is not a drop-in for a molded case breaker position.
9) What should I order if my panelboard is a Square D I-Line bus instead of a standard bolt-on panel?
Use the Square D PowerPacT Q I-Line circuit breaker, which is built for I-Line bus plug-on mounting. The ABB XT1N 125 is a fixed front design for standard panel and switchboard mounting and does not connect to an I-Line bus stab. Breaker-to-bus interface is brand and bus specific, so match the breaker to the panel you have.
10) What does fixed front (FF) mean on this ABB breaker, and how does it affect mounting?
Fixed front means the breaker has a fixed front cover configuration for standard panel and switchboard mounting, as opposed to a plug-in or drawout arrangement. The breaker is bolted into place and the handle operates through the panel front. If your application calls for a drawout or plug-in breaker so the unit can be removed without de-energizing the bus, this fixed front version is not the right choice.
11) What is the exact part number to order for the ABB XT1N 3-pole breaker?
The manufacturer part number is XT1NU3030AFF000XXX. That string encodes the XT1N frame, the U (North American) version, the 3-pole build, and the AFF fixed front arrangement. Quote that number when you are matching an existing device in a panel or adding to a standardized facility spec.
12) I only need to protect a single 120V lighting circuit - is the ABB XT1N 125 overkill?
For one 120V single-phase circuit, yes. The Square D Multi9 C60 1-pole C-curve miniature circuit breaker is rated 120V AC and is a single-pole device, which matches a single lighting or receptacle circuit. The XT1N 125 is a 3-pole configuration intended for balanced protection across three-phase circuits.
13) Do the Square D miniature breakers give me the same field-adjustable trip setting as the ABB XT1N 125?
No. The XT1N 125 carries a TMF trip unit with an adjustable 30-500 trip range, so it can be calibrated in the field to the load without swapping the breaker. The Square D Multi9 C60 is a fixed C-curve miniature breaker, and the C60 UL489 is a miniature breaker as well - those are selected by ampere rating and curve rather than dialed in after installation.
14) How is the ABB XT1N breaker packaged for stocking?
One each per unit. For an MRO storeroom or a contractor buying spares against a standardized panel schedule, that means the quantity you order is the number of breakers you receive, with no carton multiple to work around.
15) Where can I get full technical data on the ABB XT1N 125 breaker for a submittal?
ABB publishes a spec sheet PDF for the XT1N, linked from the product's technical data. Pull that for interrupting ratings, terminal data, and dimensional drawings when you are putting together a submittal package or verifying the breaker against an engineer's one-line.
How fast can I get the ABB XT1NU3030AFF000XXX 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 ABB XT1NU3030AFF000XXX come with a warranty?
Absolutely. The ABB XT1NU3030AFF000XXX 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 ABB XT1NU3030AFF000XXX?
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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