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Trusted, Independent Distributor of Square D Electrical Products
Looking for a source for Square D electrical parts? Essential Electric Supply is an independent distributor and supplier of Square D circuit breakers, motor controls, switches, and bus plugs, covering both current Square D by Schneider Electric production and compatible parts for older Square D equipment. In-stock orders placed by 1:30PM ET ship the same business day. Our team helps confirm the right part before you buy, and most products carry a two-year warranty.
Square D equipment shows up in everything from residential load centers to I-Line panelboards and motor control centers, so whether you are replacing a single QO breaker or sourcing an obsolete I-Line frame for a retrofit, our team can confirm frame size, trip rating, and interrupting capacity before you order.
- Fast Order Processing: In-stock orders placed by 1:30PM ET ship the same business day
- Expert Technical Support: Real people who help you confirm the right part before you buy
- 2-Year Warranty: Backed by Essential Electric Supply on most products
Square D Power Distribution Equipment We Stock
This page covers current Square D by Schneider Electric circuit breakers, motor controls, switches, and bus plugs, plus compatible parts for older Square D equipment still in service.
- Square D Circuit Breakers: QO and Homeline load center breakers, I-Line panelboard breakers in FA, FH, KA, KH, LA, LH, MA and MH frames, and current production PowerPact H, J and L frame breakers.
- Square D Motor Controls: Class 8536 magnetic starters, Class 8903 lighting contactors, Model 6 motor control center buckets, and TeSys contactors and overload relays.
- Square D Switches: Type H heavy-duty and Type D general-duty safety switches for commercial and industrial disconnect applications.
- Square D Bus Plugs: I-Line busway plug-in units for busway and power distribution systems.
Not sure which line your panel uses? Send us the catalog number or a photo of the panel label, and we will confirm the match.
Who Bought Square D?
Schneider Electric bought Square D in 1991. Square D is owned by Schneider Electric, not Eaton. The two are separate companies that get mixed up because both make circuit breakers and panelboards for similar markets. Read the full Square D brand history for how the Schneider relationship came together, or browse Schneider Electric products for the parent brand's current lineup.
Is Square D the Same as Schneider Electric?
Square D is a Schneider Electric brand, so the two names appear on the same equipment. Current Square D products are branded Square D by Schneider Electric, and catalog numbers carry over. That does not make every Square D part interchangeable with every Schneider Electric part, so check panel labeling and UL listing before substituting.
Where to Buy Obsolete Square D Parts
For current production equipment, Essential Electric Supply carries in-stock Square D circuit breakers, motor controls, switches, and bus plugs. For older panels, we also stock new, surplus, and hard-to-find replacement parts for discontinued Square D equipment, including components that are no longer available elsewhere.
Frequently Asked Questions
Who owns Square D?
Schneider Electric, which acquired Square D in 1991.
Are Square D and Eaton the same company?
No. Square D is owned by Schneider Electric. Cutler-Hammer is the comparable brand owned by Eaton.
Do you sell discontinued Square D breakers?
Yes. We stock new, surplus, and obsolete Square D breakers, including I-Line frames that are no longer produced.
How fast do Square D orders ship?
In-stock orders placed by 1:30PM ET ship the same business day.
Essential Electric Supply is an independent distributor and is not an authorized distributor, affiliate, or representative for Square D or Schneider Electric. All manufacturer names and part numbers are used for identification purposes only.
Not sure which part you need? Contact our technical support team or browse all manufacturers we carry.
