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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 40A
- Circuit Breaker Frame Type:
- Complete breaker
- Circuit Breaker Type:
- HFD
- Class:
- Vdc
- Frame Size:
- F-frame
- Interrupt Rating:
- 42 kAIC at 600 Vac
- Number Of Poles:
- Three-pole
- Terminals:
- Line and load
- Trip Type:
- Fixed thermal, fixed magnetic
- Voltage Rating:
- 600 Vac, 250 Vdc
- Department:
- Electrical
- Product Length:
- 3.38 IN
- Product Height:
- 6 IN
- Product Weight:
- 6.3 LB
- Product Width:
- 4.13 IN
B-LINE HFDDC3040L – Frequently Asked Questions
1) Can the Eaton HFDDC3040L breaker be used on a 250 VDC solar PV array?
Yes. The HFDDC3040L is rated 600 Vac, 250 Vdc, and it is classed as a Vdc device for PV Guard / solar use. On the DC side that 250 Vdc ceiling is the number that matters, so string voltage (including cold-temperature Voc rise) has to stay under it.
2) Is 42 kAIC enough interrupting rating for my service, and what is the HFDDC3040L rated at?
The breaker carries a 42 kAIC interrupting rating at 600 Vac. That covers most commercial and light-industrial services, but it must equal or exceed the available fault current at the point of installation per your short circuit study. Where available fault current exceeds 42 kA at 600 V, you need a higher-interrupting frame instead.
3) Do I need to order a trip unit or terminals separately for the HFDDC3040L?
No. It ships as a complete breaker with both line and load terminals, and the trip is fixed thermal, fixed magnetic, so there is no separate rating plug or adjustable trip unit to specify. You order the one part number, HFDDC3040L, and it is ready to land conductors.
4) What amperage and how many poles does the HFDDC3040L molded case breaker have?
It is a three-pole, 40 amp molded case breaker on Eaton's F-frame, HFD type. All three poles are fixed together, so on a DC array you would typically series poles to reach the needed DC voltage rating rather than treat it as three separate 40A circuits.
5) Will the HFDDC3040L fit the enclosure space I have?
Dimensions are 6 in, 4.13 in and 3.38 in (height, width, length as published), with a shipping weight of 6.3 lb. It is a standard Eaton F-frame body, so it mounts in F-frame enclosures and panel cutouts.
How fast can I get the B-LINE HFDDC3040L 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 HFDDC3040L come with a warranty?
Absolutely. The B-LINE HFDDC3040L 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 HFDDC3040L?
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 HFDDC3040L 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.