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Eaton / Cutler-Hammer FB3070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FB3070
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FB3070
Quantity
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Eaton / Cutler-Hammer FB3070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial applications, this 70A molded case circuit breaker features a fixed thermal-magnetic trip mechanism for dependable overcurrent protection. It carries an interrupt rating of 14kAIC at 480VAC, making it suitable for standard industrial distribution networks. The 3-pole breaker is engineered to mount into Westinghouse and Eaton Pow-R-Line panelboards, switchboards, and motor control centers. For modern cross-references, this legacy F-Frame model is replaced by the FDB3070.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3070-R |
| Series | FB |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse / Eaton Pow-R-Line Panelboards, Switchboards, Motor Control Centers |
| 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Product FAQs
5 answersWhich panelboards are compatible with the FB3070 circuit breaker?
This F-frame breaker is designed to mount into legacy Westinghouse and Eaton Pow-R-Line panelboards, switchboards, and motor control centers.
What is the modern replacement for the obsolete FB3070 circuit breaker?
The direct modern replacement for this legacy F-frame breaker is the Eaton FDB3070. It shares the same physical dimensions and mounting configuration, allowing it to fit into existing panel spaces without modifications.
Is the FB3070 manufactured by Westinghouse or Eaton?
Eaton acquired the Westinghouse distribution equipment line. Depending on the vintage, this breaker may carry Westinghouse, Cutler-Hammer, or Eaton branding, but all are functionally identical and interchangeable.
Can the FB3070 be used in direct current applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA, making it suitable for specific DC circuit protection.
Is the trip unit on the FB3070 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time thermal and instantaneous magnetic trip functions are factory set and cannot be adjusted in the field.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- SDSal D.Verified BuyerReviewingEaton / Cutler-Hammer FB3125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/16/26Breakers
Really happy with the breakers and with the quickness they were delivered
- CBChristopher B.ReviewingEaton / Cutler-Hammer FB3015L - 15A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/8/20AWESOME JOB
Quick response and delivery. Exactly what I wanted.