Square D KA36150 Molded Case Circuit Breaker | 150A 3-Pole 600V I-Line Plug-In

Square D KA36150 – 150 Amp Molded Case Circuit Breaker (I-Line Plug-In)

The Square D KA36150 is a heavy-duty, 3-pole molded case circuit breaker (MCCB) engineered for reliable overcurrent and short-circuit protection in demanding industrial and commercial power distribution systems. Featuring Square D's trusted I-Line plug-in style connection, this breaker delivers fast, tool-free installation into compatible I-Line panelboards — minimizing downtime and simplifying maintenance.

Key Specifications

• Part Number: KA36150
• Manufacturer: Square D (Schneider Electric)
• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Amperage Rating: 150 Amps
• Number of Poles: 3-Pole
• Voltage Rating: 600V AC
• Interrupting Rating: 25kAIC @ 480V
• Trip Type: Thermal-Magnetic (LI – Long-Time & Instantaneous)
• Connection Style: I-Line Plug-In
• Frame: KA-Frame
• Standards: UL Listed

What Is the Square D KA36150?

The KA36150 is a thermal-magnetic molded case circuit breaker from Square D's KA-Frame series. It is designed to protect electrical circuits against overloads and short circuits using a dual-protection mechanism: long-time thermal protection for sustained overloads and instantaneous magnetic protection for sudden fault currents. This LI (Long-Time / Instantaneous) trip characteristic makes it ideal for motor branch circuits, feeder protection, and industrial power distribution panels.

I-Line Plug-In Connection Explained

The I-Line style plug-in design allows the KA36150 to connect directly into Square D I-Line panelboards and switchboards without additional hardware. This plug-in architecture is a hallmark of Square D's I-Line system, offering:

• Fast, secure installation and removal
• Consistent, reliable electrical contact
• Compatibility with Square D I-Line distribution equipment
• Reduced labor costs during installation and upgrades

Applications

The KA36150 is well-suited for a wide range of industrial and commercial applications, including:

• Motor control centers (MCCs)
• Industrial switchboards and panelboards
• Feeder and branch circuit protection
• Manufacturing facilities and process equipment
• Commercial HVAC and power distribution systems
• Retrofit and replacement in existing Square D I-Line installations

Why Choose the Square D KA36150?

Square D, a brand of Schneider Electric, is one of the most trusted names in electrical distribution equipment. The KA36150 combines decades of engineering reliability with a plug-in design optimized for modern industrial environments. Whether you're upgrading aging infrastructure or specifying new equipment, the KA36150 offers proven protection backed by Square D's global support network.

Frequently Asked Questions

What does KA36150 mean?
The "KA" refers to Square D's KA-Frame series, "3" indicates 3-pole configuration, "6" denotes the 600V voltage class, and "150" is the ampere rating. Together, KA36150 identifies a 150A, 3-pole, 600V thermal-magnetic molded case circuit breaker.

Is the KA36150 compatible with Square D I-Line panelboards?
Yes. The KA36150 features an I-Line plug-in connection specifically designed for use with Square D I-Line panelboards, switchboards, and motor control centers. Always verify compatibility with the specific panelboard model before installation.

What is the interrupting rating of the KA36150?
The KA36150 has an interrupting rating of 25kAIC (25,000 Amperes Interrupting Capacity) at 480V AC, making it suitable for most commercial and light industrial fault current environments.

What trip functions does the KA36150 include?
It uses a thermal-magnetic trip unit with LI (Long-Time and Instantaneous) functions — providing thermal protection against sustained overloads and magnetic protection against instantaneous short-circuit currents.

Can the KA36150 be used as a motor branch circuit protector?
Yes, with appropriate sizing and coordination, the KA36150 can be applied in motor branch circuit protection applications. Consult NEC guidelines and your system's short-circuit current rating (SCCR) for proper application.

Condition

This unit is available in New condition (SKU: KA36150-N). It is ready for immediate installation in compatible Square D I-Line systems.