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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 500A
- Circuit Breaker Frame Type:
- Trip unit
- Circuit Breaker Type:
- NB
- Interrupt Rating:
- 200 kAIC at 600 Vac, 100 kAIC at 250 Vdc
- Line:
- Pressure
- Magnetic Trip Range:
- 2500-5000A
- Number Of Poles:
- Three-pole
- Trip Type:
- Fixed thermal, fixed magnetic
- Voltage Rating:
- 600 Vac, 250 Vdc
- Department:
- Electrical
- Product Type:
- Trip unit only
- Product Length:
- 5.5 IN
- Product Details:
- Trip unit only
- Product Height:
- 8.25 IN
- Product Weight:
- 4 LB
- Product Width:
- 8.25 IN
B-LINE NB3500PT – Frequently Asked Questions
1) Is the NB3500PT a complete circuit breaker or just the trip unit?
Trip unit only. The NB3500PT is the rating plug/trip unit portion of an Eaton Classic NB-type molded case breaker, so it mounts into an existing NB frame. If you need a full breaker assembly with the frame included, this part alone will not energize a panel.
2) What amp rating and trip range does the NB3500PT have?
It is a 500A trip unit with a fixed thermal, fixed magnetic trip and a magnetic trip range of 2500-5000A. Because both thermal and magnetic elements are fixed, there is no field adjustment; the coordination study has to be done around the 2500-5000A instantaneous band.
3) Will the NB3500PT work on a 480V three-phase service?
Yes. The unit is rated 600 Vac and 250 Vdc, three-pole, so a 480Y or 480 delta three-phase feeder is inside its rating.
4) What interrupting rating does this Eaton NB 500A trip unit carry?
200 kAIC at 600 Vac and 100 kAIC at 250 Vdc. That covers high available fault current services where a standard 65 kAIC device would need series rating or current limiting ahead of it.
5) Can I use the NB3500PT to change the amp rating of an existing NB breaker?
That is exactly the use case. Swapping the trip unit in an NB frame changes the protection to 500A with a 2500-5000A instantaneous band, without replacing the frame or re-terminating the feeder cable. The frame itself must be an Eaton Classic NB type.
6) How big and heavy is the NB3500PT for panel space and handling?
Listed at 8.25 in height, 8.25 in width, 5.5 in length, and 4 lb. One person can set it, but check the gear cavity clearance against the 8.25 by 8.25 footprint before ordering.
7) What is the exact part number to order for this 500A NB trip unit?
Order Eaton part NB3500PT. That single designation covers the 500A three-pole fixed thermal, fixed magnetic trip unit in the Classic NB line.
8) Is the NB3500PT a lug or pressure connection style?
It is the pressure line style within the Eaton Classic NB family. Confirm the terminations on the frame you are fitting match the pressure type before you commit, since the connection style is part of how these are cataloged.
9) Is there a spec sheet for the Eaton NB3500PT?
Yes, Eaton publishes a spec sheet for NB3500PT and it is linked from the product description for download.
How fast can I get the B-LINE NB3500PT 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 B-LINE NB3500PT come with a warranty?
Absolutely. The B-LINE NB3500PT 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 B-LINE NB3500PT?
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 B-LINE NB3500PT from ZenSupply?
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and
rewards on
every order.
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