Square D LI36500 - 500 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Overview

The Square D LI36500 is a 500 A, 600 V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters. Built for speedy installation and straightforward upgrades, this unit is a reliable choice for demanding electrical environments. Available from AmpState, it pairs professional-grade protection with a plug-in connection that minimizes downtime during maintenance or panel modernization.

Key advantages

• 500 A rating for heavy-duty circuits: Supports demanding branch circuits without compromising protection accuracy.
• 600 V maximum voltage: Suitable for commercial, light industrial, and residential applications that require robust high-voltage protection.
• Three-pole design: Ideal for 3-phase systems common in commercial and light-industrial installations.
• Plug-in mounting: Quick, tool-free installation and seamless replacement in compatible panels.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by automatically responding to overloads and short circuits.
• OEM-compatible: Engineered to integrate with matching Square D OEM loadcenters and panelboards for reliable electrical coordination.

Why it matters for your project

Choosing a circuit breaker that aligns with your panel system isn’t just about protection—it’s about reliability, serviceability, and long-term performance. The LI36500’s thermal-magnetic trip curve is tuned to deliver predictable responses under varying fault conditions, reducing nuisance trips and ensuring safe shutdown when faults occur. Its plug-in design minimizes panel downtime during replacements or upgrades, keeping your electrical system running smoothly in busy commercial spaces or critical facilities.

Technical snapshot

• Manufacturer: Square D
• Part number: LI36500
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 500 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Panelboards and loadcenters in commercial buildings requiring dependable 3-phase protection
• Residential applications where heavy-gauge branch circuits demand robust overcurrent protection
• Light industrial installations that operate at up to 600 V and rely on reliable, fast-clearing protection

Installation and best practices

To maximize performance and compatibility, verify that your panel is designed for plug-in installation with this 3-pole unit. The quick-connect plug-in feature enables fast replacement or upgrades with minimal panel downtime. Always follow electrical codes during installation and conduct periodic inspections of connections and trip performance to maintain optimal protection integrity.

What makes this choice stand out

Unlike generic breakers, the LI36500 is purpose-built for Square D panel systems, ensuring precise fit, correct trip characteristics, and streamlined maintenance within OEM-compatible environments. This leads to fewer unexpected trips, easier future panel upgrades, and a safer, more reliable electrical system across residential, commercial, and light industrial settings.