Square D KA36225 - 225 A, 3-Pole Plug-In Circuit Breaker | AmpState

The Square D KA36225 is a 225 A, 3-pole plug-in molded case circuit breaker engineered to protect panelboards and load centers from overcurrent and short-circuit events. Built for reliable performance in demanding electrical environments, this unit delivers dependable branch circuit protection where it matters most.

Designed for fast, hassle-free service, the plug-in connection feeds installation and replacement with minimal downtime. Whether you’re upgrading an aging panel or stocking spare parts for a quick swap, the KA36225 slides into compatible Square D panelboards without drama—so you stay on schedule and on code.

At the heart of its protection is a thermal-magnetic trip unit that provides stable, repeatable response across fluctuating loads and operating conditions. This means precise, predictable disconnection when faults occur, while avoiding nuisance trips during normal startup surges or load changes.

This breaker is specifically engineered to pair with matching OEM load centers and panelboards, ensuring a native fit, proper bus alignment, and consistent trip characteristics. It’s well-suited for residential, commercial, and light industrial applications where robust, dependable protection is non-negotiable.

Key specifications at a glance

• Manufacturer: Square D
• Part Number: KA36225
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 225 A
• Number of Poles: 3
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from the Square D KA36225? Electrical professionals managing panel upgrades, service changes, or routine maintenance in commercial spaces and large residences. It’s ideal when you need a high-capacity, plug-in solution that installs quickly, aligns with OEM panels, and delivers consistent protective performance under real-world conditions.

Practical tips for use

• Confirm compatibility with your existing Square D panelboard or load center to ensure a seamless plug-in fit and identical trip characteristics.
• Use in applications where 225 A is appropriate for main or feeder protection, keeping in mind conductor sizing and balance across phases.
• Keep spares of KA-series plug-in breakers on hand for faster maintenance turnaround in commercial settings.