Square D KA36090 - 90 A, 3-Pole Plug-In Circuit Breaker | AmpState

Square D KA36090 is a 90-amp, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters. Its fast plug-in connection makes installation and replacement quick, helping you minimize downtime during electrical work.

• Rapid plug-in installation—a secure, tool-free connection that reduces service time when adding or upgrading circuits.
• Thermal-magnetic trip unit—provides stable, repeatable protection by automatically coordinating overload and short-circuit responses for consistent performance.
• OEM-ready compatibility—engineered to fit matched Square D OEM loadcenters and panelboards, ensuring proper fit, electrical contact, and reliable operation.
• Versatile applications—suitable for residential, commercial, and light industrial environments where reliable 90A protection is required.

Technical details

• Manufacturer: Square D
• Part number: KA36090
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 90 A
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

This 3-pole plug-in breaker is ideal for upgrading panel infrastructure, coordinating with existing protection schemes, and expanding capacity in a way that emphasizes safety and reliability. When selecting a replacement or upgrade, choose a unit that pairs with your OEM panelboard to maintain consistent trip characteristics and electrical performance across the distribution system.