Designed for 3-phase commercial applications, the Square D EDB36030 is a 30A miniature circuit breaker. It offers fixed long-time and instantaneous trip functions to maintain system safety. The breaker features a bolt-on mounting configuration tailored exclusively for Square D NF panelboards. Capable of interrupting 18 kAIC at 480Y/277V, this E-Frame unit meets UL 489 standards. It also includes the signature Visi-Trip visual indicator, making it simple to spot a tripped circuit in a panel.
Which panelboards accept the EDB36030 circuit breaker?
This breaker is designed specifically for Square D NF series panelboards. It features a bolt-on mounting design and will not fit in NQ, I-Line, or QO load centers.
What is the difference between EDB, EGB, and EJB circuit breakers?
EDB, EGB, and EJB are all E-Frame breakers designed for NF panelboards. They share the same physical dimensions and trip features but offer different maximum interrupting ratings. EDB provides 18kAIC at 480Y/277VAC, while EGB offers 35kAIC and EJB offers 65kAIC.
What wire sizes do the factory-installed lugs on the EDB36030 accept?
The standard lugs accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire. Always refer to the labeling on the breaker body for specific torque requirements during installation.
Is the EDB36030 rated for HVAC equipment?
Yes, this E-Frame breaker is HACR rated, making it suitable for heating, air conditioning, and refrigeration applications. It is also HID rated for high-intensity discharge lighting circuits.
Can this breaker be used on 480V or 600V systems?
Yes. The EDB36030 is rated for 480Y/277VAC grounded Wye systems with an 18kAIC interrupting rating. It is also rated for 600Y/347VAC systems with a 14kAIC rating.
Can the trip settings be adjusted on this breaker?
No, the EDB36030 features a fixed thermal-magnetic trip unit. Both the long-time and instantaneous trip functions are factory set and cannot be adjusted in the field.
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Shipping
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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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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 114 reviews.
5.0
Rated 5.0 out of 5 stars
Based on 114 reviews
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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.
Square D EDB34020 - 20A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
10/20/26
Breaker 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.
AM
Alex M.
Verified Buyer
Reviewing
Square D EDB34070 - 70A 3 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
10/19/26
Another 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!
JL
Jeffery L.
Verified Buyer
Reviewing
Square D EDB34125 - 125A 3 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
10/16/26
Square D Breakers
Good company & prices reasonable.
CO
Chris O.
Verified Buyer
Reviewing
Square D EDB34125 - 125A 3 Pole Miniature Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/4/26
Fast and easy
Locating the product, checking out and delivery were top notch!
JD
John D.
Verified Buyer
Reviewing
Square D EDB14020 - 20A 1 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
7/16/26
Great place
My rep has been very responsive and helpful. He always gives me a good deal also