Eaton / Cutler-HammerBAB3040HS
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Eaton / Cutler-Hammer BAB3040HS1 Miniature Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
BAB3040HS1
Miniature Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
BAB3040HS1
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Eaton / Cutler-Hammer BAB3040HS1 - 40A 3 Pole Miniature Circuit Breaker
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Description
Built for specialized control applications, this 40A three-pole breaker delivers robust thermal-magnetic protection. It is engineered for commercial and industrial environments requiring automated safety controls. The bolt-on configuration installs seamlessly into Eaton Pow-R-Line, Bryant, and Westinghouse panelboards. It is fully compatible as a substitute for discontinued QNBL models. Delivering a 10kAIC rating at 240VAC, this model includes a 24-48VDC shunt trip for remote power management.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | BAB3040HS1 |
| Series | BAB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | BAB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton Pow-R-Line Panelboards, Westinghouse Panelboards, Bryant 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 Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (24-48VDC) |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich panelboards are compatible with the BAB3040HS1 circuit breaker?
This breaker is designed for Eaton Pow-R-Line, Westinghouse, and Bryant panelboards. It requires a panelboard busbar specifically configured to accept bolt-on branch breakers, and will not fit in standard residential plug-on load centers.
What does the HS1 suffix mean in the BAB3040HS1 catalog number?
The HS1 suffix indicates the breaker includes a factory-installed 24 to 48 VDC shunt trip accessory. This allows the breaker to be tripped remotely via an external control signal, which is commonly used for emergency stops or automated safety controls.
How does the bolt-on mounting of the BAB3040HS1 differ from plug-on breakers?
Bolt-on breakers secure directly to the panelboard busbar using screws, providing a highly secure, vibration-resistant connection. This mounting style is typically required in commercial and industrial environments to prevent accidental disconnection.
How does the thermal-magnetic trip unit function on this breaker?
The fixed thermal-magnetic mechanism provides dual protection. The thermal element offers a delayed trip for sustained overloads (Long-Time), while the magnetic element provides an instantaneous trip to quickly clear severe short circuits.
Can I use this Eaton breaker to replace an older Cutler-Hammer or Westinghouse BAB breaker?
Yes. Because Eaton acquired the Cutler-Hammer and Westinghouse distribution equipment lines, this breaker is a direct, UL-listed replacement for older Cutler-Hammer, Westinghouse, and Bryant BAB frame breakers with matching specifications.
Is the BAB3040HS1 HACR rated for HVAC applications?
Yes, Eaton BAB breakers from 15A to 100A are HACR rated. This makes the 40A BAB3040HS1 suitable for protecting heating, air conditioning, and refrigeration equipment circuits.
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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