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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 400A
- Circuit Breaker Frame Type:
- Trip unit
- Circuit Breaker Type:
- HLA
- Frame:
- L-frame
- Interrupt Rating:
- 65 kAIC at 240 Vac, 35 kAIC at 600 Vac
- Number Of Poles:
- Three-pole
- Trip Rating:
- 2000-4000A
- Trip Type:
- Interchangeable thermal-magnetic
- Voltage Rating:
- 600 Vac
- Department:
- Electrical
- Product Length:
- 8.6 IN
- Product Height:
- 5.4 IN
- Product Weight:
- 2.45 LB
- Product Width:
- 5.4 IN
B-LINE HLA3400T – Frequently Asked Questions
1) Will the Eaton HLA3400T trip unit fit an L-frame breaker?
Yes. The HLA3400T is an L-frame trip unit, HLA type, three-pole. It is an interchangeable trip unit rather than a complete breaker, so it drops into an L-frame molded case breaker body of the matching HLA type. If your breaker is a J, K, or other frame, this is not the part.
2) What amperage does the HLA3400T trip unit provide?
400A continuous. Its magnetic trip range is 2000 to 4000A, so instantaneous pickup is adjustable within that band. Rated to 600 Vac.
3) What is the interrupting rating on this Eaton HLA 400 amp trip unit?
65 kAIC at 240 Vac and 35 kAIC at 600 Vac. Check the available fault current at your panel against those numbers before you spec it; a service with higher available fault current at 480 or 600 volts needs a higher AIC breaker or series-rated combination.
4) Is the HLA3400T a complete circuit breaker or just the trip assembly?
Just the trip assembly. It is an interchangeable thermal-magnetic trip unit for an Eaton Classic molded case breaker, so you also need the L-frame breaker body it mounts into. Ordering this alone will not give you a usable breaker.
5) Can I change the amp rating of an L-frame breaker by swapping this trip unit?
That is exactly what an interchangeable trip unit is for. Swapping to the HLA3400T sets the breaker at 400A with a 2000 to 4000A magnetic trip range, without replacing the whole breaker or re-terminating the feeders. The frame and type have to match: L-frame, HLA, three-pole.
6) What is the exact part number to order this Eaton 400A L-frame trip unit?
Eaton part number HLA3400T. The H denotes the higher interrupting HLA type, 3 the three poles, and 400 the 400 amp rating.
7) How big and heavy is the HLA3400T trip unit for shipping and panel clearance?
It measures 8.6 inches long, 5.4 inches wide and 5.4 inches high, and weighs 2.45 lb. Useful if you are checking gutter space or stocking a spare on the MRO shelf.
How fast can I get the B-LINE HLA3400T 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 HLA3400T come with a warranty?
Absolutely. The B-LINE HLA3400T 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 HLA3400T?
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 HLA3400T 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.