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Eaton Series G complete molded case circuit breaker
Manufacturer Resources
Product Specs
- Amperage Rating:
- 90A
- Circuit Breaker Type:
- JG
- Frame Size:
- JG-frame
- Frequency Rating:
- 50/60 Hz
- Interrupt Rating:
- 100 kAIC at 240 Vac, 65 kAIC at 480 Vac, 25 kAIC at 600 Vac
- Number Of Poles:
- Four-pole
- Series:
- Series G
- Terminals:
- Line and load
- Trip Type:
- Fixed thermal, adjustable magnetic
- Voltage Rating:
- 600 Vac, 250 Vdc
- Department:
- Electrical
- Product Group:
- Electrical Components
- Product Subgroup:
- Circuit Breakers
- Product Type:
- Complete breaker
- Product Length:
- 3.44 IN
- Product Details:
- Complete breaker
- Product Height:
- 7 IN
- Product Weight:
- 8 LB
- Product Width:
- 5.34 IN
B-LINE JGH4090FAG – Frequently Asked Questions
1) Will the Eaton Series G JGH4090FAG work on a 480V three-phase panel, and what is its interrupting rating there?
Yes. The JGH4090FAG is rated 600 Vac (and 250 Vdc), so 480 Vac is within range. Interrupting capacity is 65 kAIC at 480 Vac, 100 kAIC at 240 Vac, and 25 kAIC at 600 Vac. Match the kAIC against the available fault current at the point of installation, because the 480 Vac number is the one that governs on a typical commercial three-phase service.
2) Is the JGH4090FAG a three-pole or four-pole breaker?
Four-pole. That makes it the choice where a switched neutral or a fourth switched conductor is required, such as certain generator or transfer applications and IEC-style four-wire distribution. If your panel only needs three phases switched, a four-pole breaker will take more mounting width than you need.
3) Can the trip settings be adjusted on the JGH4090FAG, or is it fixed?
It is a fixed thermal, adjustable magnetic breaker. The thermal element that handles sustained overload is set at the 90 A rating and cannot be changed; the magnetic instantaneous element can be adjusted in the field, which is what you use to ride through motor inrush without nuisance tripping. If you need adjustable long-time and short-time settings, you need an electronic trip unit instead, not this thermal-magnetic version.
4) Does the JGH4090FAG come with lugs, or do I have to order terminals separately?
It is supplied as a complete breaker with line and load terminals, so both ends are terminated as shipped. Confirm the lug wire range suits your conductor size for a 90 A four-pole feeder before you pull cable.
5) What are the dimensions and weight of the Eaton Series G JG-frame 90 amp breaker for enclosure planning?
The JGH4090FAG measures 7 x 5.34 x 3.44 inches and weighs 8 lb. Use those figures when checking gutter space and door clearance in the enclosure, and plan support for an 8 lb device if it is being panel-mounted rather than bussed in.
6) Can I use this Eaton Series G breaker on a 50 Hz system or on DC?
Yes to both. The JGH4090FAG is rated 50/60 Hz, so it suits export and 50 Hz installations as well as North American 60 Hz, and it carries a 250 Vdc rating for DC applications alongside the 600 Vac AC rating.
7) What does the JG frame designation mean when I am matching a replacement breaker?
JG is the frame class, and the JGH4090FAG is a JG-frame Series G device. Frame determines the physical envelope and the mounting and connection pattern, so a like for like swap means matching the JG frame first, then the pole count, amperage and interrupting rating. A breaker from a different Eaton frame will not drop into a JG-frame position even at the same 90 A rating.
8) What is the exact part number to order this Eaton Series G 90 amp four-pole breaker?
The manufacturer part number is JGH4090FAG, an Eaton Series G complete molded case circuit breaker. Quote that number in full: the JGH prefix carries the interrupting class, 4 the pole count, and 090 the amperage, so a single character change puts you on a different breaker.
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Does the B-LINE JGH4090FAG come with a warranty?
Absolutely. The B-LINE JGH4090FAG is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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