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Eaton / Cutler-Hammer FDB3045 Molded Case Circuit Breaker
- 45A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FDB3045
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FDB3045
Quantity
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Eaton / Cutler-Hammer FDB3045 - 45A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial power distribution, the FDB3045 is a 3-pole, 45A MCCB. It features a fixed thermal-magnetic trip unit to deliver precise LI protection. This bolt-on breaker is designed for Eaton Series C panelboards, switchboards, and F-frame enclosures. It provides a reliable replacement for older installations. Rated at 14kAIC at 480VAC, it comes equipped with load-side lugs. The breaker is HACR and HID rated, making it suitable for HVAC and lighting circuits.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FDB3045 |
| Series | FDB |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers, F-Frame Enclosures |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip, HID Rated |
Product FAQs
9 answersWhat types of panels and enclosures are compatible with the FDB3045?
The FDB3045 is an F-Frame molded case circuit breaker designed for commercial and industrial use. It is compatible with Eaton Series C panelboards, switchboards, motor control centers, and F-Frame enclosures. It will not fit in standard residential load centers.
What does the LI trip function on the FDB3045 indicate?
The LI designation means the breaker's thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function trips immediately during a short circuit.
Is the trip unit on the FDB3045 adjustable?
No, the FDB3045 features a non-interchangeable thermal-magnetic trip unit with fixed thermal (overload) and fixed magnetic (short circuit) settings.
What is the difference between the FDB3045 and the FD3045?
Both are 45A, 3-pole F-Frame circuit breakers, but they have different interrupting capacities. The FDB3045 is rated at 14kAIC at 480VAC, while the FD3045 is a higher-interrupting version rated at 35kAIC at 480VAC.
Are there higher interrupting capacity alternatives to the FDB3045?
Yes. If your system requires a higher fault current rating at 480VAC than the 14kAIC provided by the FDB3045, you can upgrade to the FD3045 (35kAIC), HFD3045 (65kAIC), or FDC3045 (100kAIC). All share the same physical F-Frame dimensions.
Can the FDB3045 be reverse fed?
Yes, Eaton F-Frame thermal-magnetic circuit breakers, including the FDB3045, are suitable for reverse feed applications. Always ensure proper labeling and follow NEC guidelines when backfeeding a breaker.
What wire sizes are compatible with the FDB3045 lugs?
The standard factory lugs for the FDB3045 accept 14 AWG to 1/0 AWG copper or aluminum conductors. Always verify the torque specifications printed on the breaker faceplate before terminating the wires.
Is the FDB3045 HACR rated?
Yes, all Eaton F-Frame thermal-magnetic circuit breakers, including the FDB3045, are HACR rated. This means they are approved for use with heating, air conditioning, and refrigeration equipment.
Can the FDB3045 be used in DC circuits?
Yes, the FDB3045 is rated for up to 250VDC with an interrupting capacity of 10kAIC, making it suitable for specific direct current applications.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
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Rating
2 reviews
- BBrentVerified BuyerReviewingEaton / Cutler-Hammer FDB3060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Breaker was as expected.
Breaker was clean, you could not tell it was used.
- RFRussell F.Verified BuyerReviewingEaton / Cutler-Hammer FDB3025 - 25A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/24/26Right product, right time
This is what I needed, and I got it in time.