ABB XT5N 400 Molded Case Circu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12,593.30
ABB XT5N 400 Molded Case Circuit Breaker, 3-Pole

ABB XT5N 400 Molded Case Circuit Breaker, 3-Pole

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Model: XT5NU330AEFF000XXX

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

$12,593.30
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ABB XT5N 400 Molded Case Circuit Breaker, 3-Pole

The ABB XT5N 400 is a fixed, three-pole molded case circuit breaker from the Tmax XT5N platform, built to UL/CSA requirements with front terminals for straightforward panel and switchboard wiring. It integrates a solid-state Ekip Dip LS/I R electronic release factory-configured at 300, delivering long-time and short-time/instantaneous overcurrent protection for demanding commercial and industrial power distribution systems. Supplied 1 each, this breaker is engineered for dependable, code-compliant circuit protection.

Key Features

  • Frame Rating: XT5N 400 frame circuit breaker platform for mid-range commercial and industrial feeder and branch circuit protection.
  • Configuration: Fixed, three-pole (3P) design with front terminals for simplified panel and switchboard installation.
  • Solid-State Trip Release: Ekip Dip LS/I R electronic release factory-set at 300, providing long-time (L) and short-time/instantaneous (S/I) overcurrent protection functions.
  • Compliance: Manufactured to UL/CSA requirements for use in North American electrical distribution systems.
  • Packaging: Supplied 1 each for straightforward stocking and installation planning.

Certifications & Compliance

  • UL/CSA Compliant Molded Case Circuit Breaker

Technical Specifications

  • Country of Origin: UKN

Typical Applications

  • Commercial and Industrial Power Distribution
  • Panelboard and Switchboard Circuit Protection
  • Feeder and Branch Circuit Overcurrent Protection
  • New Construction and Electrical System Upgrades

Why ABB?

ABB's Tmax XT5N series pairs a robust fixed three-pole molded case design with solid-state Ekip Dip electronic trip technology, giving electrical professionals precise, adjustable overcurrent protection backed by UL/CSA compliance. It's a dependable choice for commercial and industrial power distribution projects that demand code-compliant, long-lasting circuit protection.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Circuit Breaker
Series:
XT5N
Configuration:
3-Pole
Amperage Rating:
400A
Standards:
UL/CSA
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Circuit Breakers

ABB XT5NU330AEFF000XXX – Frequently Asked Questions

1) What is the amperage rating of the ABB XT5N 400 three-pole breaker, and what is the trip unit set at?
The XT5N 400 is a 400A frame breaker in a fixed three-pole configuration. The Ekip Dip LS/I R solid-state electronic release ships factory-configured at 300, so the protection setting out of the box sits below the frame rating. The trip unit is adjustable, which is the point of the Ekip Dip release: you set the long-time and short-time/instantaneous pickups to the feeder you are actually protecting rather than swapping the breaker.
2) Does the Ekip Dip LS/I R trip unit include ground fault protection?
No. The LS/I R release on the XT5N 400 covers long-time (L) and short-time/instantaneous (S/I) functions only. If your drawing calls for ground fault protection at this breaker, an LS/I trip unit will not satisfy it and you need a release that carries the G function.
3) Is the ABB XT5N 400 a plug-in or draw-out breaker, and how does it terminate?
It is a fixed-mount breaker, not plug-in or draw-out, and it comes with front terminals. That means it lands in the panel or switchboard with conductors brought to the front of the case. If your gear is built around a draw-out cassette or rear-connected studs, this version will not drop into it.
4) Can I use a DIN rail miniature circuit breaker instead of the ABB XT5N 400?
No - they solve different problems. The XT5N 400 is a 400A three-pole molded case breaker for feeder and branch protection in panelboards and switchboards. The Square D C60 UL489 is a miniature circuit breaker that mounts on DIN rail, the format used for control panels and small branch circuits. An MCB will not carry a 400A feeder, and the XT5N does not mount on DIN rail - it lands on front terminals in a panel or switchboard.
5) What is the closest alternative to the ABB XT5N 400 if I need a molded case breaker with a thermal magnetic trip instead of electronic?
The ABB XT5N 400 uses a solid-state Ekip Dip LS/I R electronic release, which gives you adjustable long-time and short-time/instantaneous settings. If the application calls for a fixed thermal magnetic trip instead, the Square D PowerPacT B is a molded case breaker with a thermal magnetic trip unit. The tradeoff is adjustability: the Ekip Dip release lets you dial in coordination settings, while a thermal magnetic unit protects on its built-in curve.
6) I need a three-pole breaker for an I-Line panelboard - will the ABB XT5N 400 fit?
The XT5N 400 is a fixed-mount breaker with front terminals, wired into a panel or switchboard rather than plugged onto an I-Line bus. For an I-Line bus connection, the Square D PowerPacT Q is the I-Line style breaker. Choose by how the breaker lands: front-terminal fixed mounting for the XT5N 400, I-Line bus stab for the PowerPacT Q.
7) What are the alternatives to the ABB XT5N 400 if I want a thermal magnetic breaker instead of electronic trip?
The XT5N 400 carries a solid-state Ekip Dip release rather than a thermal magnetic trip. If you want a conventional thermal magnetic molded case breaker, the Square D PowerPacT B is that style. For I-Line style gear, Square D PowerPacT Q is the I-Line mounting family. Note the mounting difference: the ABB is a fixed front-terminal unit, so it is not an I-Line bus-stab replacement.
8) What part number do I order for the ABB XT5N 400 3-pole breaker with the Ekip Dip trip unit?
The catalog number is XT5NU330AEFF000XXX, ABB Tmax XT5N platform, 400A frame, three-pole, fixed, front terminals, Ekip Dip LS/I R release. It is supplied one each, so quantity ordered equals breakers received.
9) What should I use for a single-pole 120V control or lighting circuit instead of the ABB XT5N 400?
The XT5N 400 is a 3-pole 400A device sized for feeders, not for a single 120V branch. For a single-pole 120V AC circuit, the Square D Multi9 C60 1-pole C-curve miniature breaker is built for that duty; the C curve suits general lighting and mixed loads with modest inrush. Keep the XT5N 400 for the three-phase feeder ahead of those branches.
10) Is the Square D C60 UL489 a substitute for the ABB XT5N 400 in a switchboard?
It is not. Both are UL 489 listed overcurrent devices, so they can look interchangeable on a submittal line, but the C60 UL489 is a DIN rail mount miniature breaker and the XT5N 400 is a 400A three-pole molded case breaker with front terminals for panelboard and switchboard wiring. Frame size, mounting method, and current rating all differ - swapping one for the other will not match the enclosure prep or the feeder ampacity.
11) Can the ABB XT5N 400 be used as a service main as well as a feeder breaker?
The XT5N 400 is applied for feeder and branch circuit overcurrent protection in commercial and industrial distribution, including new construction and system upgrades. Whether it can serve as a service disconnect depends on how your gear is listed and labeled, so that call comes off the switchboard listing rather than the breaker alone.
12) Where can I get the full technical data for the ABB XT5N 400 breaker for submittal?
ABB publishes a spec sheet for the XT5N 400 covering the Tmax XT5N platform data, and it is linked in the product specifications as a PDF. That document is what to attach for submittals when an engineer wants interrupting ratings and dimensional data on record.
How fast can I get the ABB XT5NU330AEFF000XXX delivered?
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Can I return it if it doesn’t work for me?
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Does the ABB XT5NU330AEFF000XXX come with a warranty?
Absolutely. The ABB XT5NU330AEFF000XXX 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 XT5NU330AEFF000XXX?
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