Square D Schneider Electric Miniature Circuit Breakers
Square D miniature circuit breakers from Schneider Electric provide reliable overcurrent protection for residential, commercial, and industrial electrical systems. The Multi9 line offers a broad selection of UL 489 and UL 1077 listed breakers in 1-pole through 4-pole configurations, supporting flexible system design across a wide range of applications.
Schneider Electric manufactures several distinct families of Square D miniature circuit breakers to meet different installation and protection requirements. These include lighting panelboard breakers for NF series panelboards, Homeline breakers for streamlined residential and light commercial installations, QO and QOB breakers for QO distribution panels, and QOU unit mount breakers for versatile mounting and AC or DC system protection. Each product line is engineered to meet specific performance, mounting, and compliance needs.
Most Square D miniature circuit breakers feature the VISI-TRIP® indication system. When a breaker trips, the handle moves to a center position and a red indicator becomes visible through the case window, providing immediate visual confirmation that the circuit has been interrupted. This feature supports faster troubleshooting and improved system maintenance in demanding environments.
FAQs
Q: What types of Square D miniature circuit breakers are available?
Square D offers lighting panelboard breakers, Homeline breakers, QO and QOB breakers, and QOU unit mount breakers. Each type is designed for specific panelboards, mounting methods, and application requirements.
Q: What is the VISI-TRIP® indicator?
VISI-TRIP® is a visual trip indication feature that displays a red indicator when the breaker has tripped. This allows quick identification of interrupted circuits without additional testing.
Q: What are lighting panelboard miniature circuit breakers used for?
Lighting panelboard miniature circuit breakers are designed for use with NF series lighting panelboards in commercial and industrial lighting and power distribution applications. They are typically available in current ratings from 15 to 125 amps.
Q: What protection features are available with Homeline breakers?
Homeline miniature circuit breakers are available with standard thermal-magnetic protection as well as advanced functions such as Arc Fault, Combination Arc Fault (CAFI), Ground Fault (Class A GFCI), and Dual Function protection.
Q: What is a trip curve in a circuit breaker?
A trip curve is a graphical representation showing how quickly a circuit breaker trips in response to overcurrent conditions. It reflects the combined operation of the bimetal strip for prolonged overloads and the solenoid for short-circuit or high-current events.
Why Buy Square D Miniature Circuit Breakers from RSP Supply
RSP Supply offers a complete selection of Square D miniature circuit breakers from Schneider Electric, including the Multi9 product line and supporting breaker families. Our inventory supports a wide range of amperages, pole configurations, mounting styles, and protection features to meet code and application requirements. Customers rely on RSP Supply for accurate product selection, dependable availability, and technical support for industrial and electrical systems.