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Square D EDB36040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Square D
EDB36040
Molded Case Circuit Breaker
Brand
Square D
SKU
EDB36040
Quantity
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Square D EDB36040 - 40A 3 Pole Molded Case Circuit Breaker
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Description
Delivering reliable commercial power protection, the Square D EDB36040 is a 3-pole, 40A molded case circuit breaker. This E-Frame device utilizes thermal-magnetic trip technology to defend against overloads and short circuits in demanding environments. Designed for seamless integration, it bolts into Square D NF panelboards. The included load side lugs accommodate 14-2/0 AWG copper or 12-2/0 AWG aluminum conductors. It is rated for 14 kAIC at 600Y/347VAC and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | EDB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 480Y/277VAC, 600Y/347VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 120VAC, 25kA @ 240VAC, 18kA @ 480Y/277VAC, 14kA @ 600Y/347VAC |
| Frame Type | EDB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D NF Panelboards |
| Wire Gauge | 14-2/0 AWG (Cu), 12-2/0 AWG (Al) |
| Max Wire | 2/0 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment, Lug Kits |
|---|---|
| Accessories | Load Side Lugs Included, Aluminum Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, cULus, HACR, HID, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
Product FAQs
7 answersWhich panelboards are compatible with the EDB36040 circuit breaker?
This E-frame breaker is designed exclusively for bolt-on installation in Square D NF series panelboards. It will not fit in NQ, I-Line, or QO load centers.
What is the difference between the EDB36040, EGB36040, and EJB36040?
The difference is the interrupting rating. The EDB36040 is the standard tier rated at 18kAIC at 480Y/277V. The EGB36040 is rated for 35kAIC, and the EJB36040 is rated for 65kAIC at the same voltage. All three share the same physical dimensions and fit the same NF panelboards.
Can the EDB36040 be installed on a 480V or 600V ungrounded delta system?
No. The EDB36040 has a slash voltage rating of 480Y/277V and 600Y/347V. This means it is only approved for use on solidly grounded wye systems where the voltage to ground does not exceed 277V or 347V. It is not rated for straight 480V or 600V delta systems.
Is the EDB36040 rated for 100 percent continuous duty?
No, standard Square D E-frame breakers are 80 percent rated. For continuous loads lasting three hours or more, the maximum load should not exceed 32 amps, which is 80 percent of its 40-amp rating.
What is the recommended lug torque for the EDB36040?
For the standard factory lugs, the tightening torque is 34.5 lb-in for 14 to 10 AWG wire, and 49.6 lb-in for 8 to 2/0 AWG wire. Always verify the exact torque specifications printed on the breaker label before terminating conductors.
Do I need a separate mounting kit to install this breaker?
No additional mounting hardware is required. The EDB36040 features integrated bolt-on connectors that secure directly to the bus bars of a Square D NF panelboard.
Does the EDB36040 include equipment ground fault protection?
No, the standard EDB36040 provides only thermal-magnetic overload and short-circuit protection. Breakers with equipment ground fault protection will have a specific EPD suffix in the catalog number.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 114 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 10/21/26
Customers say these breakers perform as expected and arrive quickly. Fast shipping and competitive pricing are frequently mentioned, with many noting significant savings compared to local suppliers. Customers appreciate the easy-to-use website, responsive sales representatives, and reliable delivery. Products consistently arrive in good condition and well-packaged. Common feedback highlights dependable service, wide product availability, and seamless ordering processes. Customers report using this supplier repeatedly for their breaker needs.
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Rating
114 reviews
- BBenVerified BuyerReviewingSquare D EDB34020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/20/26Breaker ordered and delivered.
Called in as a last attempt because my regular supplier didn't have any of these in stock. I got a very friendly salesperson, and they sold me a new breaker for less than half of what my standard supplier would have. Definitely going here again.
- AMAlex M.Verified BuyerReviewingSquare D EDB34070 - 70A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/19/26Another Perfect Order
SuperBreakers is an amazing resource for the company I work for. Their prices are very competitive to local suppliers and lower prices than we can get in our work area.
Thank you SuperBreakers!
- JLJeffery L.Verified BuyerReviewingSquare D EDB34125 - 125A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/16/26Square D Breakers
Good company & prices reasonable.
- COChris O.Verified BuyerReviewingSquare D EDB34125 - 125A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/26Fast and easy
Locating the product, checking out and delivery were top notch!
- JDJohn D.Verified BuyerReviewingSquare D EDB14020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26Great place
My rep has been very responsive and helpful. He always gives me a good deal also