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Manufacturer Resources
Spec Sheet
Product Specs
- Amperage Rating:
- 40A
- Auxiliary Switch:
- 1A-1B rear with left pigtail
- Circuit Breaker Frame Type:
- Complete breaker
- Circuit Breaker Type:
- FDB
- Frame:
- F-frame
- Frequency Rating:
- 50/60 Hz
- Interrupt Rating:
- 18 kAIC at 240 Vac, 14 kAIC at 480 Vac
- Number Of Poles:
- Three-pole
- Series:
- Series C
- Terminals:
- Load side
- 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:
- 4.5 LB
- Product Width:
- 4.13 IN
B-LINE FDB3040A02 – Frequently Asked Questions
1) What interrupting rating does the Eaton FDB3040A02 breaker have at 240V and 480V?
The FDB3040A02 is rated 18 kAIC at 240 Vac and 14 kAIC at 480 Vac. If your available fault current at the panel exceeds those numbers, this F-frame FDB is not the right breaker for the location; you need a higher-AIC frame or a series-rated combination documented for the equipment.
2) Can I use the FDB3040A02 on a 480V three-phase feeder?
Yes. It's a three-pole breaker rated to 600 Vac, so 480Y or 480 delta three-phase is within rating, and it also carries a 250 Vdc rating for DC applications. Frequency rating is 50/60 Hz, so it works on either supply frequency. Just confirm the 14 kAIC figure at 480 Vac covers your fault current.
3) Is the FDB3040A02 adjustable, or is the trip setting fixed?
Both trip elements are fixed: fixed thermal and fixed magnetic at 40A. There's no adjustable instantaneous dial, so you can't field-tune the magnetic pickup for motor inrush. If your load needs an adjustable instantaneous setting, specify an F-frame breaker with an adjustable magnetic trip instead of this one.
4) Does the FDB3040A02 come with an auxiliary switch already installed?
It ships as a complete breaker with a 1A-1B auxiliary switch mounted at the rear, with a left-side pigtail for the control wiring. That gives you one normally-open and one normally-closed contact for remote breaker-position indication or interlock into a BAS or control circuit, so you don't need to order and field-install a separate aux kit.
5) I need to replace a failed Series C F-frame breaker in an Eaton panel. Is FDB3040A02 the same part?
It's an Eaton Series C F-frame breaker of the FDB type, three-pole, 40A, so it matches an existing Series C FDB3040 application. The A02 suffix means it carries the factory 1A-1B rear auxiliary switch with left pigtail. If the breaker you're pulling out has no aux switch, or has a different aux arrangement, match the suffix on the old nameplate before ordering so your control wiring lands the same way.
6) What terminals does this 40A Eaton FDB breaker come with?
Terminals are supplied on the load side. Line-side connections are made through the panel or mounting hardware, so plan your conductor terminations accordingly and add lugs if your installation needs line-side terminals.
7) What are the dimensions and weight of the FDB3040A02 for panel layout?
Listed dimensions are 6 in height, 4.13 in width and 3.38 in length, at 4.5 lb. Use those to check gutter space and mounting depth in an existing enclosure before you commit, since F-frame breakers with a rear-mounted aux switch and pigtail need extra room behind the breaker for the leads.
8) Is the FDB3040A02 a complete breaker or just a frame that needs a trip unit?
Complete breaker. The 40A fixed thermal-magnetic trip is built in, so there's no separate trip unit or rating plug to specify. You order it as one part number, FDB3040A02.
How fast can I get the B-LINE FDB3040A02 delivered?
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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 FDB3040A02 come with a warranty?
Absolutely. The B-LINE FDB3040A02 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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