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Square D EDB34040SA Miniature Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Square D
EDB34040SA
Miniature Circuit Breaker
Brand
Square D
SKU
EDB34040SA
Quantity
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Square D EDB34040SA - 40A 3 Pole Miniature Circuit Breaker
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Description
Constructed for commercial power distribution, this 40A E-frame breaker incorporates a 120VAC shunt trip for automated or remote shutoff. The thermal-magnetic core ensures consistent protection against overloads and short circuits. Designed exclusively for Square D NF panelboards, the bolt-on connection provides maximum stability. The addition of the shunt trip means this three-pole unit occupies four total pole spaces.Specifications
| Brand | Square D |
|---|---|
| Part Number | EDB34040SA |
| Series | EDB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 277VAC, 480Y/277VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 120VAC, 25kA @ 240VAC, 18kA @ 277VAC, 18kA @ 480Y/277VAC, 25kA @ 120/240VAC |
| 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 | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, cULus, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator, Common Trip |
Product FAQs
9 answersWhat does the SA suffix indicate on the EDB34040SA part number?
The SA suffix indicates that this breaker includes a factory-installed 120VAC shunt trip accessory. This enables the breaker to be tripped remotely via an external control system using a 110V to 130V AC signal.
How many panel spaces does the EDB34040SA require?
Although it is a 3-pole breaker, the factory-installed shunt trip requires one additional pole space. It occupies a total of four spaces when installed in a Square D NF panelboard.
Can I field-install a shunt trip on a standard EDB34040 breaker?
No. Shunt trips for E-Frame circuit breakers are not field-installable. You must purchase a breaker with the accessory factory-installed, such as this EDB34040SA model.
Will the EDB34040SA fit in a standard residential load center?
No. This is a bolt-on circuit breaker designed exclusively for commercial Square D NF series panelboards. It is not compatible with plug-on residential QO or Homeline load centers.
What is the recommended terminal tightening torque for the EDB34040SA?
Torque specifications depend on the installed wire size. For 14 AWG to 10 AWG conductors, tighten the lugs to 34.5 lb-in. For 8 AWG to 2/0 AWG conductors, tighten the lugs to 49.6 lb-in.
Is the EDB34040SA suitable for HVAC equipment applications?
Yes, this E-Frame molded case circuit breaker is HACR rated, certifying it for safe use with heating, air conditioning, and refrigeration equipment.
Is this breaker rated for switching lighting circuits?
Yes, the EDB34040SA is HID rated. It can safely be used for switching high-intensity discharge lighting circuits typically found in commercial and industrial applications.
How does the breaker indicate a tripped condition?
This breaker features a Visi-Trip visual indicator. When a fault causes a trip, the breaker handle snaps to a center position and a bright red flag appears, helping personnel safely identify the tripped circuit without testing.
Are the thermal and magnetic trip thresholds adjustable on this model?
No. The EDB34040SA utilizes fixed thermal and fixed magnetic trip elements. The trip curve and amperage thresholds cannot be adjusted in the field.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 111 reviews.
Total 5 star reviews: 109 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 87 most recent customer reviews
Last updated 8/7/25
Customers say these circuit breakers arrive quickly and function as expected. Many reviews mention competitive pricing and reliable shipping. The ordering process receives praise for its simplicity, with users noting the website is easy to navigate. Frequent comments address product availability and proper packaging. While some note receiving older stock items, users consistently report the breakers work effectively.
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Rating
111 reviews
- 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
- DHDave H.Verified BuyerReviewingSquare D EDB34020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/6/26Brfeaker
good service and quick ship
- RPRonica P.Verified BuyerReviewingSquare D EDB34015 - 15A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/30/26Great Experience from Start to Finish
Great experience! My order arrived on time and everything was exactly as expected. The items were packaged securely, and everything arrived in perfect condition. I appreciate the care taken with packaging and the prompt delivery. I would definitely order from them again!
- TBTheresa B.Verified BuyerReviewingSquare D EDB34015 - 15A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/17/26Works as expected
Breaker worked as expected. Price was good and shipping and delivery were expedient. No complaints