
Eaton Miniature Circuit Breakers

Eaton miniature circuit breakers are used to protect electrical circuits from damage caused by overcurrent. They are designed to automatically trip and disconnect the circuit when the current exceeds a certain level, preventing electrical fires and other hazards.
Eaton offers a range of miniature circuit breakers that are designed for different applications, including residential, commercial, and industrial use. Their miniature circuit breakers are available in a variety of sizes and amperage ratings to accommodate different circuit requirements.
One of the advantages of Eaton miniature circuit breakers is their compact size. They are designed to take up less space in electrical panels than traditional circuit breakers, making them ideal for applications where space is limited. Additionally, Eaton MCBs are designed for easy installation and maintenance, with a modular design that allows for easy replacement if necessary.
Eaton miniature circuit breakers are also designed with safety in mind. They are UL listed and CSA certified, and are designed to meet or exceed all applicable safety standards. They are also tested to ensure they can withstand extreme temperatures, humidity, and other environmental factors.
Products
There are two critical elements in miniature circuit beakers.
- Bimetal strip. This strip has two dissimilar metals attached to one another. When a prolonged overcurrent occurs, these metals begin to bend. Because the metals are different, the rate at which they bend is different, therefore causing the strip to bend. If this bending occurs long enough, the bending strip will disrupt the electrical contacts inside the breaker, causing it to trip.
- Coil or solenoid. The coil or solenoid is designed for larger overcurrent events like a short circuit or lightning strike. When a large overcurrent event occurs, the plunger in the solenoid is actuated, thereby tripping the breaker.
It is both the prolonged overcurrent protection from the bimetal strip and the higher spikes in voltage and current protection from the solenoid that make up the circuit breakers trip curve. How fast or slow these events occur determines the shape of the curve. A trip curveis simply a graphical representation of the expected behavior of a circuit protection device, in this case, a circuit breaker. This graphical representation looks at two separate pieces of data to provide the information needed to understand when a particular breaker will trip.
- Time. More specifically, the time the circuit breaker experiences a certain amount of overcurrent.
- Amount of current. In this case, how much more current is passing through the breaker than the protection device is actually rated for.