Yes, Square D LA circuit breakers are molded case circuit breakers (MCCBs). They are designed to provide reliable protection and are housed in a molded case to provide insulation and containment of the arc energy produced during fault conditions. These breakers are suitable for commercial and industrial applications, offering high interrupting capacities and a range of trip unit options.

Square D LA circuit breakers are typically used in Square D panelboards, switchboards, and switchgear designed to accommodate their frame size and specifications. Specific panels or load centers that can house LA breakers include:

• Square D I-Line Panelboards: These panelboards are designed to accept a variety of breaker types, including LA breakers, for flexible circuit distribution and protection.
• Square D Power-Style Switchgear: LA breakers are used in Power-Style switchgear for medium to large commercial and industrial applications, providing high performance and reliable protection.
• Square D QED-2 Switchboards: These switchboards are compatible with LA breakers, offering robust protection and control in large-scale electrical distribution systems.
• Square D Masterpact Low Voltage Switchgear: This type of switchgear also accommodates LA breakers, ensuring reliable operation in critical power applications.

Square D LA breakers are not designed to be interchangeable with other brands or types of breakers due to specific mechanical and electrical design requirements. To ensure proper fit, function, and safety, only use breakers that are specified by the manufacturer for use with the particular panel or load center.

For Square D LA breakers, compatible alternatives within the same brand include:

• Square D LAL: Similar in design and specifications, with different trip unit options.
• Square D LHL: Another variant within the LA family, offering specific features for different applications.

When considering replacements or alternatives, always refer to the manufacturer’s documentation and compatibility charts to ensure that the breakers meet the required standards and ratings for your specific application. Use of non-approved breakers can void warranties, cause failed inspections, and pose significant safety risks.

Consider the electrical load requirements, making sure the current and voltage levels match the breaker’s ratings (150A to 400A). Know the interrupting capacity, as LA breakers offer up to 200kA at 480V, suitable for high fault currents. Make sure LA breakers are with your panelboard, such as Square D I-Line, QED-2 switchboards, and Power-Style switchgear. Finally, consider future expansion needs to accommodate potential load increases.