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Square D EDB34050 Miniature Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Square D
EDB34050
Miniature Circuit Breaker
Brand
Square D
SKU
EDB34050
Quantity
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Square D EDB34050 - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D EDB34050 - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | EDB34050 |
| Series | EDB |
| Amperage | 50A |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Aluminum Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, cULus, HACR, HID, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
Quantity
Square D EDB34050 - 50A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | EDB34050-R |
| Series | EDB |
| Amperage | 50A |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Aluminum Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, cULus, HACR, HID, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Visual Trip Indicator |
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Description
Designed specifically for 480Y/277VAC commercial electrical systems, this 50-amp miniature circuit breaker delivers robust thermal-magnetic overcurrent protection. The three-pole E-frame device bolts firmly into Square D NF panelboards to ensure stable connectivity in demanding environments. It features the signature Visi-Trip indicator to help maintenance personnel quickly spot tripped circuits. The unit carries an 18kAIC interrupting rating at its maximum voltage and is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | EDB34050 |
| Series | EDB |
| Amperage | 50A |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Aluminum Lugs Included |
| Standards | CSA C22.2 No. 5, 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
6 answersWhat panelboards are compatible with the Square D EDB34050?
This E-frame bolt-on circuit breaker is designed exclusively for use in Square D NF series panelboards. It will not fit NQ or I-Line panelboards.
What does the D in the EDB34050 part number signify?
In Square D's E-frame nomenclature, the D indicates an 18kA interrupting rating at 480Y/277VAC. Higher interrupting ratings are available in the EGB (35kA) and EJB (65kA) versions.
What are the lug torque specifications for wiring the EDB34050?
For 14 to 10 AWG wire, the recommended tightening torque is 34.5 lbf-in (3.9 N-m). For larger 8 to 2/0 AWG wire, torque the lugs to 49.5 lbf-in (5.6 N-m).
Is there a higher interrupting rating equivalent for the EDB34050?
Yes. If your system requires a higher fault current rating, you can substitute the EGB34050 for 35kAIC or the EJB34050 for 65kAIC at 480Y/277VAC. They share the same physical footprint and panelboard compatibility.
Is the EDB34050 rated for commercial HVAC and lighting applications?
Yes. This breaker is both HACR rated for heating, air conditioning, and refrigeration equipment, and HID rated for high-intensity discharge lighting loads.
Does the EDB34050 feature a visual trip indicator?
Yes, this breaker includes Square D Visi-Trip technology. When the breaker trips due to an overcurrent or short circuit, the handle rests in a center position and a high-visibility red indicator appears, making it easy to identify the tripped circuit in a loaded panelboard.
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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