Square D KA36175 Molded Case Circuit Breaker | 175A 3-Pole 600V I-Line Plug-In

Square D KA36175 – 175 Amp 3-Pole Thermal Magnetic Molded Case Circuit Breaker

The Square D KA36175 is a heavy-duty, 3-pole thermal magnetic molded case circuit breaker engineered for reliable overcurrent protection in demanding industrial and commercial power distribution systems. Part of Square D's trusted I-Line series, this breaker delivers precision trip performance and seamless plug-in installation into I-Line style panelboards and switchboards.

Key Specifications

• Part Number: KA36175
• Manufacturer: Square D (Schneider Electric)
• Series: I-Line / K-Frame
• Ampere Rating: 175A
• Number of Poles: 3-Pole
• Voltage Rating: 600VAC
• Phase: 3-Phase
• Interrupting Rating: 25kAIC @ 480V | 22kAIC @ 600V | 42kAIC @ 240V
• Trip Unit Type: Thermal Magnetic
• Trip Functions: LI – Long-Time and Instantaneous
• Mounting Style: I-Line Style Plug-In
• Ambient Temperature Rating: 40°C
• Frame: K-Frame
• Frequency: 50/60 Hz

What Is the Square D KA36175?

The KA36175 is a thermal magnetic molded case circuit breaker (MCCB) — a type of protective device that automatically interrupts electrical current when it detects an overload or short-circuit condition. The thermal element protects against sustained overloads, while the magnetic element responds instantly to high-level fault currents, making this breaker ideal for protecting motors, feeders, and distribution panels in three-phase electrical systems.

I-Line Style Plug-In Connection – What It Means

The KA36175 features an I-Line style plug-in connection, Square D's proprietary bus connection system. This design allows for fast, tool-free installation and removal from compatible I-Line panelboards — reducing installation time and simplifying maintenance. It is compatible with Square D I-Line switchboards, motor control centers (MCCs), and QED-2 switchboards.

Typical Applications

• Industrial plant power distribution panels
• Commercial building electrical switchboards
• Motor feeder circuit protection
• I-Line style panelboard branch circuits
• HVAC and mechanical system feeders
• Manufacturing and process control equipment

Why Choose the Square D KA36175?

Square D, a brand of Schneider Electric, has been a leader in power distribution and circuit protection since 1902. The KA36175 reflects that legacy — built to UL 489 standards and designed for years of dependable service in harsh electrical environments. Its thermal magnetic trip unit provides both overload and short-circuit protection without the need for an external control power supply, keeping installations simple and cost-effective.

Compatibility & Replacement Information

The KA36175 is a K-Frame I-Line style breaker. For modern upgrades or replacements, the Square D PowerPact J-Frame (JGL36175) is the current equivalent recommended by Schneider Electric. Always verify compatibility with your existing panelboard before ordering.

SKU: KA36175-N  |  Condition: New  |  In Stock

Frequently Asked Questions

What does KA36175 mean?
The part number breaks down as follows: KA = K-Frame type, 3 = 3-pole, 6 = 600V rating, 175 = 175 amp rating. This naming convention is standard across Square D's I-Line circuit breaker catalog.

Is the Square D KA36175 compatible with I-Line panelboards?
Yes. The KA36175 features an I-Line style plug-in connection specifically designed for Square D I-Line compatible panelboards, switchboards, and motor control centers.

What is the interrupting rating of the KA36175?
The KA36175 has an interrupting rating of 25kAIC at 480V, 22kAIC at 600V, and 42kAIC at 240V.

What replaces the Square D KA36175?
The KA36175 has been discontinued by the manufacturer. The recommended modern replacement is the Square D PowerPact J-Frame circuit breaker (JGL36175) for new installations.

What trip functions does the KA36175 include?
The KA36175 includes LI trip functions — Long-Time (overload protection) and Instantaneous (short-circuit protection) — provided by its built-in thermal magnetic trip unit.