Square D | KA36090MT | Circuit Breaker | 90A | 3-Pole | 600V

Square D KA36090MT circuit breaker delivers precise overcurrent protection for three-phase electrical systems up to 600V. With a 90 A rating and a 3-pole design, this device is engineered for reliable performance in maintenance, retrofit, and replacement projects where exact specifications must be matched.

Key specifications

• Amperage: 90 A
• Poles: 3-Pole
• Voltage rating: 600 V
• Reference: KA36090MT for compatibility

Choosing the right breaker hinges on accurate fit and ratings. The KA36090MT part number is the most precise reference for matching panels and breakers, so please confirm the fit and ratings before ordering.

What makes this breaker unique

Unlike generic substitutes, this KA36090MT is designed to align with Square D panel configurations, ensuring proper mounting alignment, consistent trip characteristics, and a seamless replacement experience with minimal panel modification.

Ideal use cases

• Maintenance and retrofit of 3-phase electrical panels in commercial or light industrial settings
• Replacement in systems requiring 90 A, 3-pole, 600 V protection with an exact form factor
• Projects where documentation specifies the KA36090MT specification for compatibility

Installation and best practices

For safe, reliable operation, verify that the breaker’s ratings meet the circuit requirements and that the panel listing supports the KA36090MT series. Follow standard electrical safety procedures and consult a licensed electrician if you’re unsure about installation.

Care, storage, and lifecycle

Store in a dry, temperature-controlled environment and protect from moisture and contaminants that could affect trip performance or mechanical fit. After installation, monitor for abnormal trips or signs of overheating, and replace components as needed to maintain system reliability.