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Eaton / Cutler-Hammer BAB1040 Miniature Circuit Breaker
- 40A
- 1 Pole
- Bolt-On
Eaton / Cutler-Hammer
BAB1040
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BAB1040
Quantity
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Eaton / Cutler-Hammer BAB1040 - 40A 1 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer BAB1040 - 40A 1 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BAB1040 |
| Series | BAB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 24VDC, 48VDC, 62.5VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 24VDC, 5kA @ 48VDC, 3.8kA @ 62.5VDC |
| Frame Type | BAB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton Pow-R-Line Panelboards, Westinghouse Panelboards, Cutler-Hammer Panelboards |
| Wire Gauge | 14-4 AWG (Al/Cu) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Sold out
Quantity
Eaton / Cutler-Hammer BAB1040 - 40A 1 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BAB1040-R |
| Series | BAB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 24VDC, 48VDC, 62.5VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 24VDC, 5kA @ 48VDC, 3.8kA @ 62.5VDC |
| Frame Type | BAB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton Pow-R-Line Panelboards, Westinghouse Panelboards, Cutler-Hammer Panelboards |
| Wire Gauge | 14-4 AWG (Al/Cu) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
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Description
Delivering 40 amps of reliable overcurrent defense, this single-pole Quicklag breaker is tailored for commercial environments. It utilizes proven thermal-magnetic technology. The bolt-on mounting guarantees a stable connection within Eaton Pow-R-Line, Cutler-Hammer, and Westinghouse panelboards. It also serves as an exact replacement for obsolete QB and QNBL units. Featuring a 10 kAIC rating at 120/240VAC, it meets standard industrial requirements and is HACR rated for HVAC installations.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BAB1040 |
| Series | BAB |
| Amperage | 40A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 24VDC, 48VDC, 62.5VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 24VDC, 5kA @ 48VDC, 3.8kA @ 62.5VDC |
| Frame Type | BAB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton Pow-R-Line Panelboards, Westinghouse Panelboards, Cutler-Hammer Panelboards |
| Wire Gauge | 14-4 AWG (Al/Cu) |
| Max Wire | 4 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich panelboards are compatible with the BAB1040 circuit breaker?
This bolt-on breaker is designed for use in Eaton Pow-R-Line panelboards, as well as legacy Westinghouse and Cutler-Hammer bolt-on load centers and panels.
Can the Eaton BAB1040 replace older Westinghouse BAB breakers?
Yes, Eaton acquired the Westinghouse distribution equipment line. The Eaton BAB1040 is the direct, manufacturer-approved replacement for legacy Westinghouse and Cutler-Hammer BAB1040 breakers.
What is the difference between Eaton BAB and QBHW circuit breakers?
The primary difference is the short-circuit interrupting rating. BAB breakers are rated at 10kAIC at 120/240VAC, while QBHW breakers offer a higher 22kAIC rating. Both share the same physical Quicklag-B frame and bolt-on mounting.
Is the BAB1040 rated for DC voltage applications?
Yes, this breaker carries a DC interrupting rating of 5kA at 24VDC and 48VDC, and 3.8kA at 62.5VDC, making it suitable for specific low-voltage DC control circuits.
Is the BAB1040 HACR rated for HVAC equipment?
Yes, Eaton BAB miniature circuit breakers are HACR rated, making them suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific certification.
Does the BAB1040 require a separate mounting kit?
No, this Quicklag breaker features a built-in bolt-on connection that mounts directly to the busbar in compatible Eaton, Cutler-Hammer, and Westinghouse panelboards.
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Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 164 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/19/26
Customers say these breakers function as intended and arrive quickly. Fast shipping is consistently mentioned across reviews, with many noting timely delivery and secure packaging. Customers appreciate competitive pricing and the availability of items in stock. Products arrive in good condition, well-packaged, and work properly upon installation. Common feedback addresses responsive customer service and reliable order fulfillment. Most customers report smooth purchasing experiences and indicate they will return for future orders.
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Rating
164 reviews
- RSRoss S.Verified BuyerReviewingEaton / Cutler-Hammer BAB1020 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Breakers
The right breakers at a great price.
- JHJason H.Verified BuyerReviewingEaton / Cutler-Hammer BAB3080H - 80A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/16/26Excellent Experience
We placed our first order with superbreakers.com recently for a breaker we weren't able to acquire locally. I ordered the breaker way ahead of time because I've had issues with shipping for products purchased online in the past. The estimate for the item when I initially ordered was 3 days. Without adding an expedited shipping options, the breaker arrived the next day. We installed it this week, and so far so good. In my opinion, they sell quality parts and have excellent turn around time. Very impressed.
- REReliant E. S.Verified BuyerReviewingEaton / Cutler-Hammer BAB1030 - 30A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/13/26easy and quick
quick and always has what I need
- LFLincoln F.Verified BuyerReviewingEaton / Cutler-Hammer BAB3030H - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Mstr Electrician
Came on time, works great! Always good quality, dependable service. Thanks again.
- DNDouglas N.Verified BuyerReviewingEaton / Cutler-Hammer BAB2020 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Church
Did the job all is great thank you