Cutler-Hammer is now owned and sold under the Eaton brand

Cutler-Hammer is a circuit breaker and electrical equipment manufacturer that was acquired by Eaton Corporation in 1978. Today, Cutler-Hammer products are sold under the Eaton name, though you may still see the Cutler-Hammer label on older breakers in homes and buildings. If you have a panel with a Cutler-Hammer breaker, you are looking at equipment made by Eaton.

The acquisition happened decades ago, so most breakers installed in the last 20 to 30 years carry the Eaton branding. However, homeowners often refer to their breakers by the older Cutler-Hammer name, and electricians and inspectors still recognize both names as referring to the same product line. The confusion is common and not a problem — they are the same company and the same equipment.

Key Takeaways

  • Cutler-Hammer was purchased by Eaton Corporation in 1978 and is no longer sold under the Cutler-Hammer name.
  • Breakers labeled Cutler-Hammer are genuine Eaton products and are still in use in many homes built before the 2000s.
  • Eaton manufactures a full range of circuit breakers, panels, and electrical safety equipment for residential and commercial use.
  • Replacement breakers for an older Cutler-Hammer panel are available under the Eaton brand and are compatible with the original panel.

Why the name change happened

Eaton Corporation is a diversified industrial manufacturer based in Ohio. When Eaton bought Cutler-Hammer in 1978, it was acquiring a well-established brand with decades of market presence. Rather than retire the name when ready, Eaton kept the Cutler-Hammer brand in use for several years during the transition. Over time, as products were updated and rebranded, the Eaton name became the standard for new equipment.

This kind of gradual rebranding is common in industrial acquisitions. Customers and contractors already knew Cutler-Hammer, so the transition took time. By the 1990s and 2000s, Eaton had become the primary brand name for all circuit breakers and electrical panels in this product line.

What to look for on your panel

If you open your electrical panel and see a breaker or label that says Cutler-Hammer, it is a legitimate Eaton product. The breaker will still function normally and can be replaced with a modern Eaton breaker of the same amperage and type. Do not assume an older Cutler-Hammer breaker is defective straightforward because of its age — age alone does not determine whether a breaker needs replacement.

However, if your panel is very old (pre-1970s) or if you notice any signs of damage, corrosion, or frequent tripping, have an electrician inspect it. Some older panel designs have been recalled or phased out for safety reasons, but the Cutler-Hammer name itself is not a red flag.

Replacement breakers and compatibility

If you need to replace a breaker in a Cutler-Hammer panel, you can purchase an Eaton breaker rated for the same amperage and voltage. Eaton breakers are designed to fit into Cutler-Hammer panels because they are the same product line. You should not mix breaker brands — do not install a Siemens, Square D, or other brand breaker into a Cutler-Hammer or Eaton panel unless an electrician has confirmed compatibility.

Breaker replacement is not a do-it-yourself task. The panel contains live electricity even when the main breaker is off, and working inside a panel can cause serious injury or death. Always hire a licensed electrician to replace a breaker or perform any work inside your electrical panel.

Eaton's current product line

Eaton now manufactures circuit breakers under several brand names depending on the product type and market. The main residential lines include standard single-pole and double-pole breakers, GFCI breakers (ground fault circuit interrupter), AFCI breakers (arc fault circuit interrupter), and specialty breakers for specific applications. All of these are sold under the Eaton brand, though some may carry sub-brand names like Eaton Cutler-Hammer or straightforward Eaton.

Eaton also makes complete electrical panels, surge protection devices, and other equipment for home electrical systems. If you are upgrading your panel or adding circuits, an electrician can source Eaton breakers and equipment that match your existing installation.

When to call an electrician

You should contact a licensed electrician if you notice breakers that trip frequently, a burning smell near the panel, visible corrosion or water damage, or if you need to add a new circuit or replace a breaker. You should also have the panel inspected if you are buying a home with an older Cutler-Hammer panel, especially if the home was built before 1980.

An electrician can determine whether your panel is safe to continue using, whether it needs maintenance, or whether it should be replaced. They can also confirm that any breaker you need is compatible with your specific panel model.

Frequently Asked Questions

Is a Cutler-Hammer breaker safe to use?

Yes, Cutler-Hammer breakers are safe and are still in use in millions of homes. They are manufactured to the same standards as modern Eaton breakers. Age alone does not make a breaker unsafe, though very old panels should be inspected by an electrician.

Can I use an Eaton breaker in a Cutler-Hammer panel?

Yes, Eaton breakers are designed to work in Cutler-Hammer panels because Eaton owns the Cutler-Hammer product line. However, breaker replacement should only be done by a licensed electrician due to the risk of electrical shock.

What if I can't find a replacement breaker for my old Cutler-Hammer panel?

Eaton still manufactures breakers for most Cutler-Hammer panel models. If a specific breaker is no longer available, an electrician can help you find a compatible alternative or discuss whether the panel should be upgraded.

Do I need to replace my Cutler-Hammer panel just because it's old?

Not necessarily. Age alone is not a reason to replace a panel. An electrician can inspect it and tell you whether it is safe to keep using or whether replacement is recommended based on its condition and your home's electrical needs.