Eaton NB Series Molded Case Ci...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5,378.24
Eaton NB Series Molded Case Circuit Breaker Trip Unit, Three-Pole, Fixed Thermal-Magnetic

Eaton NB Series Molded Case Circuit Breaker Trip Unit, Three-Pole, Fixed Thermal-Magnetic

(No reviews yet) Write a Review

Model: NB3400PT

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

$5,378.24
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Eaton NB Series Molded Case Circuit Breaker Trip Unit, Three-Pole, Fixed Thermal-Magnetic

The Eaton NB Series molded case circuit breaker trip unit is built for demanding commercial and industrial power distribution applications, delivering a 400 A amperage rating, a dual voltage rating of 600 Vac / 250 Vdc, and a 2000-4000A magnetic trip range in a rugged three-pole, UL 489 listed design. Configured with fixed thermal, fixed magnetic trip elements, this NB frame trip unit is engineered to provide dependable overcurrent protection with a 100 kAIC interrupt rating at 250 Vdc for critical distribution equipment.

Key Features

  • Amperage Rating: 400 A rated trip unit sized for demanding feeder and branch circuit protection.
  • Voltage Rating: 600 Vac, 250 Vdc dual rating for flexible AC and DC distribution applications.
  • Magnetic Trip Range: 2000-4000A adjustable magnetic trip setting for tailored overcurrent coordination.
  • Interrupt Rating: 100 kAIC at 250 Vdc for high fault-current withstand in demanding installations.
  • Trip Type: Fixed thermal, fixed magnetic trip elements deliver consistent, predictable overcurrent response.
  • Number of Poles: Three-pole configuration for balanced three-phase circuit protection.
  • Circuit Breaker Type: NB frame trip unit, designed as a trip unit only replacement component.
  • Compact Dimensions: 8.25 in width x 8.25 in height x 5.5 in depth footprint for straightforward integration.

Certifications & Compliance

  • UL 489 Listed

Technical Specifications

  • Circuit breaker type: NB
  • Department: Electrical

Typical Applications

  • Commercial and Industrial Power Distribution Systems
  • Switchgear and Panelboard Trip Unit Replacement
  • Three-Phase Motor Control and Feeder Protection
  • Heavy-Duty Industrial Load Protection
  • High Fault-Current Distribution Equipment

Why Eaton?

Eaton engineers the NB Series trip unit to deliver dependable, UL 489 listed overcurrent protection backed by a fixed thermal, fixed magnetic trip design rated for a 100 kAIC interrupt rating at 250 Vdc. For electrical professionals maintaining or retrofitting molded case circuit breakers, this trip unit offers the code-compliant reliability required for critical three-pole power distribution applications.

Manufacturer Resources

Product Specs

Product Width:
8.25 in
Magnetic trip range:
2000-4000A
Voltage Rating:
600V
Amperage Rating:
400A
Product Length/Depth:
5.5 in
Circuit breaker frame type:
Trip unit
Product Height:
8.25 in
Product Type:
Circuit Breaker
Prod load:
Pressure
Number of poles:
Three-pole
Line:
Pressure
Trip rating:
2000-4000 A
Interrupt rating:
100 kAIC at 250 Vdc
Circuit breaker type:
NB
Trip Type:
Fixed thermal, fixed magnetic
Certifications:
UL 489
Department:
Electrical
Series:
NB
Standards:
UL 489
Product Group:
Circuit Breakers

Eaton NB3400PT – Frequently Asked Questions

How fast can I get the Eaton NB3400PT 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 Eaton NB3400PT come with a warranty?
Absolutely. The Eaton NB3400PT 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 Eaton NB3400PT?
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
Why buy the Eaton NB3400PT from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!