SDVOSB CERTIFIED – GSA CONTRACT HOLDER

Circuit Breakers for Commercial, Industrial & Government Projects

Name: ATEK Distribution
Address: 3401 Nevada Ave. N, Minneapolis, MN, 55427, US
Telephone: +1 (952) 254-1205

Molded case, insulated case, GFCI, and hard-to-find obsolete circuit breakers — correctly specified, sourced, and shipped nationwide by a certified SDVOSB electrical distributor.

Request a Quote

Call +1 (952) 254-1205

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SDVOSB Certified & GSA Contract Holder

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Current-Production & Obsolete Breakers Sourced

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NEC & NEMA Compliance Support

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Nationwide Shipping, Fast Quotes

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Documentation for Inspection & Compliance

What Is a Circuit Breaker?

A circuit breaker is an automatically operated electrical switch designed to protect a circuit from damage caused by overcurrent, overload, or short circuit. When it detects a fault, it interrupts the flow of electricity — preventing wire overheating, equipment damage, and fire hazards. Unlike a fuse, a circuit breaker can be reset and reused after it trips, which is why breakers are the standard choice in modern residential, commercial, and industrial electrical systems.

ATEK Distribution supplies circuit breakers and panelboards across a wide range of amperage ratings, NEMA enclosure types, and brands — including current-production, hard-to-find, and legacy equipment for retrofits and repairs.

Types of Circuit Breakers We Supply

Molded Case Circuit Breakers (MCCB)

Application: Residential, commercial, and light industrial panels.
Amperage: Ranges from roughly 15A up to 1600A.
Build: Compact, fully enclosed in an insulated molded case — the most widely used breaker type.

Insulated Case Circuit Breakers (ICCB)

Application: Large facilities, switchgear-mounted systems, critical loads.
Amperage: 800A to 5000A.
Build: Two-step stored-energy mechanism with serviceable trip units — built for higher capacity and maintenance flexibility.

GFCI & AFCI Breakers

Application: Ground-fault (GFCI) and arc-fault (AFCI) circuit protection required by the NEC in kitchens, bathrooms, outdoor areas, and bedrooms.
Function: Shuts off power within milliseconds when it detects current leaking to ground or a dangerous arc fault.

Miniature Circuit Breakers (MCB)

Application: Branch-circuit protection at the panel level for lighting, receptacles, and small equipment loads.
Build: Lower amperage ratings, DIN-rail or panel-mount configurations.

Obsolete & Legacy Circuit Breakers

Need a discontinued model or a breaker for an older panel? Our team sources current-production, hard-to-find, and legacy circuit breakers across major manufacturers — helping you complete a retrofit or repair without replacing an entire panelboard.

Molded Case vs. Insulated Case Circuit Breakers: How to Choose

The right circuit breaker type depends mainly on the amperage and application. For most projects up to roughly 1,000A — residential panels, small commercial buildings, and light industrial equipment — a molded case circuit breaker (MCCB) is the standard, cost-effective choice. For large plants, critical facilities, switchgear-mounted systems, or applications needing high short-circuit capacity and easy field maintenance, an insulated case circuit breaker (ICCB) is the better fit, since it is built for 800A–5000A loads and allows components to be serviced without replacing the entire unit.

Not sure which breaker your project needs? Send us your panel specs, amperage, and application — our team will help you match the correct breaker type before you order.

Who We Serve

ATEK supplies circuit breakers to six distinct buyer groups nationwide, each with different procurement requirements and compliance obligations.

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Commercial, Institutional & Government (CIG)

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Municipalities, Universities, Schools & Hospitals (MUSH)

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Construction & Contractors

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Industrial

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Renewable Energy

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Residential

Frequently Asked Questions

What is the difference between a molded case and an insulated case circuit breaker?

Molded case circuit breakers (MCCBs) are fully enclosed in an insulated case and typically handle up to about 1,600A — the standard choice for residential, commercial, and light industrial panels. Insulated case circuit breakers (ICCBs) are built for 800A to 5,000A, use a two-step stored-energy mechanism, and allow trip units and contacts to be serviced without removing the whole breaker — making them the better fit for large facilities and switchgear-mounted systems.

How do I choose the right amperage rating for a circuit breaker?

The breaker’s amperage rating must match the maximum expected current draw of the circuit it protects, based on the wire gauge and connected load per NEC Table 310.16. Your electrician or engineer calculates this from the panel schedule and load calculations — our team confirms product availability and specs once you have the rating you need.

Can ATEK source obsolete or discontinued circuit breakers?

Yes. Our team regularly sources current-production, hard-to-find, and legacy circuit breakers and panelboards across major manufacturers, including models for older systems that are no longer in standard production.

What is the difference between a circuit breaker and a fuse?

Both protect a circuit from overcurrent, but a fuse must be physically replaced after it blows, while a circuit breaker can simply be reset and reused. Circuit breakers are now the standard in most residential, commercial, and industrial systems because of this reusability and because they can be paired with GFCI and AFCI protection.

Do circuit breakers need to be GFCI or AFCI protected?

The NEC requires GFCI protection for outdoor receptacles, bathrooms, kitchens, garages, and other specific wet or damp locations, and AFCI protection for most bedroom and living-area branch circuits. Whether a given circuit needs GFCI, AFCI, or both depends on its location and use — your electrician determines the requirement for your specific panel.

Can I replace a circuit breaker myself?

In most areas, electrical panel work — including breaker replacement — requires a licensed electrician and a permit. Some states allow a homeowner permit for work on a primary residence under strict limitations, but this doesn’t apply to rental or commercial properties. We supply the correct breaker; a licensed electrician should always perform the installation.

Does ATEK supply circuit breakers for government contracts?

Yes. ATEK Distribution is a certified SDVOSB and GSA Contract Eligible Supply Partner, active in SAM.gov, supplying circuit breakers and distribution equipment to federal, state, and municipal agencies nationwide, with BAA product verification and submittal support available on request.

How fast can I get a quote on circuit breakers?

Call +1 (952) 254-1205 or email info@atekdistribution.com with the make, model, or specs you need. Our Minneapolis-based team typically responds the same day with pricing and availability.

How ATEK sources circuit breakers

ATEK Distribution sources and supplies circuit breakers and electrical products from leading manufacturers through its supplier network based on project requirements and availability.

In practice this means we are not tied to one manufacturer line. When a specification calls for a particular frame size, interrupting rating, or trip unit, we source to the specification rather than steering you toward whatever happens to be in stock.

Molded case circuit breakers for commercial installations

Molded case circuit breakers (MCCBs) are the most commonly specified breaker type on commercial projects. Getting the right one requires matching four things: frame size, ampere rating, interrupting rating (AIC), and trip unit type.

Send us the one-line diagram, the panel schedule, or the existing breaker nameplate and we will cross-reference against available product. If the specified breaker is discontinued, we will identify current equivalents and flag where the substitution changes anything electrically.

What we need from you to quote accurately

Frame size and ampere rating
Interrupting rating required at the point of installation
Voltage and number of poles
Trip unit type, thermal-magnetic or electronic
Any accessories: shunt trip, auxiliary contacts, under-voltage release
Quantity and required on-site date

A photograph of the existing breaker nameplate is usually enough if the drawings are not to hand.

Circuit breakers for government and federal projects

ATEK Distribution holds GSA Multiple Award Schedule contract 47QSMS25D00A1, is registered in SAM.gov under UEI C8QHP8LKRLV8, and is a certified Service-Disabled Veteran-Owned Small Business.

For federal, state, and municipal work we can supply Buy American Act compliance verification and product origin documentation alongside the breakers themselves. Full details are on the GSA contract page and the Government page.

Need a Fast Quote on Circuit Breakers?

Tell us what you need — including make, model, or specs — and our Minneapolis team will get back to you quickly with pricing and availability.