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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 400A
- Circuit Breaker Frame Type:
- Frame only
- Circuit Breaker Type:
- HLA
- Frame:
- L-frame
- Interrupt Rating:
- 65 kAIC at 240 Vac, 35 kAIC at 600 Vac
- Magnetic Trip Range:
- 2000-4000A
- Number Of Poles:
- Three-pole
- Trip Type:
- Interchangeable thermal-magnetic
- Voltage Rating:
- 600 Vac
- Department:
- Electrical
- Product Group:
- Racks & Frames
- Product Subgroup:
- Frames
- Product Type:
- MARK 75 frame only
- Product Length:
- 13 IN
- Product Details:
- MARK 75 frame only
- Product Height:
- 7.3 IN
- Product Weight:
- 15.5 LB
- Product Width:
- 10 IN
B-LINE HLA3400F – Frequently Asked Questions
1) Does the Eaton HLA3400F come with a trip unit, or is it just the breaker frame?
HLA3400F is a frame only. It is the Eaton Mark 75 L-frame molded case breaker frame rated 400A, and it uses an interchangeable thermal-magnetic trip unit that is ordered separately. If you need a complete, ready-to-install breaker, this is not it on its own - you have to pair the frame with the matching interchangeable trip.
2) What is the interrupting rating of the Eaton HLA3400F 400A breaker frame?
The HLA frame is rated 65 kAIC at 240 Vac and 35 kAIC at 600 Vac. Check that against the available fault current at the point of application - if your study shows more than 35 kA on a 480 or 600 volt system, this frame is not rated for that location.
3) Will an HLA3400F work as a replacement for an existing Eaton Mark 75 L-frame breaker?
It is the Mark 75 L-frame in the HLA type, three-pole, 400 amp frame, 600 Vac. If the breaker coming out is the same Mark 75 L-frame line-up and pole count, this is the matching frame - but it ships without a trip unit, so plan on either reusing a compatible interchangeable trip or ordering one with it.
4) What is the magnetic trip range on the Eaton HLA 400 amp frame?
Magnetic trip is adjustable over 2000 to 4000 amps, which is 5x to 10x the 400A frame rating. That range is what lets you ride through motor inrush on a large motor feeder while still clearing a bolted fault quickly. The thermal side comes from the interchangeable trip unit you install in the frame.
5) How big and heavy is the HLA3400F breaker frame for panel space and handling?
Dimensions are 13 x 10 x 7.3 inches and it weighs 15.5 pounds. That is a two-hand lift into a panel or switchboard cell, and worth confirming against your gutter and cover clearance before you order, since an L-frame takes noticeably more room than a smaller molded case frame.
6) Is the HLA a fixed-trip breaker or can the trip setting be changed later?
Not fixed. The HLA uses an interchangeable thermal-magnetic trip, so the ampere rating within the frame can be changed by swapping the trip unit rather than replacing the whole breaker. For an MRO stockroom that is the argument for standardizing on the frame and keeping trip units on the shelf for several different feeder sizes.
7) Where can I get the full Eaton spec sheet for HLA3400F?
Eaton publishes a dedicated spec sheet for HLA3400F, and it is linked directly from the product description. That document is what to submit when an engineer asks for cut sheets on a 400A L-frame breaker.
How fast can I get the B-LINE HLA3400F delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE HLA3400F come with a warranty?
Absolutely. The B-LINE HLA3400F is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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