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Eaton molded case circuit breaker accessory trip unit, Trip unit, 900 A, Three-pole, 600 V, 250 Vdc, Magnetic with front adjustable trip unit, Frame J-K, Series C
Manufacturer Resources
Product Specs
- Amperage Rating:
- 900A
- Compliances:
- Contact Manufacturer
- Frame Size:
- Frame J-K
- Number Of Poles:
- Three-pole
- Series:
- Series C
- Trip Type:
- Magnetic with front adjustable trip unit
- Voltage Rating:
- 600 V, 250 Vdc
- Department:
- Electrical
- Product Type:
- Trip unit
- Product Details:
- Trip unit
B-LINE PB3900T – Frequently Asked Questions
1) Will the Eaton PB3900T trip unit fit my breaker frame?
The PB3900T is built for Eaton Series C molded case breakers in the Frame J-K range. It will not mount in other frame sizes, so confirm your breaker is a J or K frame Series C before ordering.
2) What amperage and pole configuration does the PB3900T trip unit cover?
It is a 900 A, three-pole unit. If your breaker is a two-pole application or a different ampere rating, this is not the matching trip unit.
3) Is the PB3900T a thermal-magnetic or magnetic-only trip unit?
Magnetic only, with a front adjustable trip setting. That means instantaneous short circuit protection you can dial in from the front without pulling the unit, but no thermal overload element. If the panel schedule calls for thermal-magnetic overload protection, this is the wrong unit.
4) Does the PB3900T include the circuit breaker itself?
No. It is an accessory trip unit only, the interchangeable trip module that goes into a Series C J or K frame breaker. The breaker housing, terminals and any lugs are separate items.
5) What voltage can this 900 A Eaton trip unit be used at?
Rated 600 V AC and 250 Vdc, so it covers 480Y/277 and 600 V three-phase distribution as well as 250 Vdc applications.
6) Can I adjust the trip setting after the breaker is installed in the panel?
Yes. The adjustment is front accessible on the PB3900T, so an electrician can change the instantaneous pickup with the unit in place rather than removing the breaker for a bench setting.
7) What part number should I give my distributor for this Eaton J-K frame trip unit?
Order by MPN PB3900T, described as an Eaton molded case circuit breaker accessory trip unit, 900 A, three-pole, Series C. One model covers the whole offering, so there are no suffixes or options to specify.
How fast can I get the B-LINE PB3900T 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 PB3900T come with a warranty?
Absolutely. The B-LINE PB3900T 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 PB3900T?
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 PB3900T from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.