Square D FAL36040 - 40 A, 600 V, 3-Pole Circuit Breaker | AmpState

Square D FAL36040 is a 40A, 600V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit protection and short-circuit safety for panelboards and loadcenters. Built for durable performance in demanding electrical environments, this MCCB is engineered to fit neatly into OEM load centers while delivering precise, repeatable protection when it matters most.

Why electricians choose the FAL36040

• Space-efficient molded case design helps maximize panel capacity without compromising protection. Its compact footprint makes it an ideal replacement or upgrade in densely packed panels.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overload and short-circuit conditions. This means predictable tripping behavior across a range of operating temperatures and load profiles.
• 3-pole configuration suitable for 3-phase systems, delivering coordinated protection for all hot conductors in commercial and light industrial installations.
• 600V voltage rating supports higher voltage distribution networks, giving you a single device capable of protecting multi-voltage panel circuits where needed.
• OEM compatibility designed to pair with matching Square D OEM load centers and panelboards, ensuring straightforward installation, reliable terminations, and consistent performance with existing components.
• Versatile application rated for residential, commercial, and light industrial environments, making it a practical choice for a wide range of projects from retrofits to new builds.

Ideal use cases

• Upgrading or replacing aging or damaged breakers in panelboards where 3-phase protection is required.
• Feeding critical circuits in commercial spaces (lighting, HVAC, outlets) while maintaining clean load segregation and fault protection.
• Protection of branch circuits in light industrial electrical rooms where reliable thermal-magnetic trip characteristics minimize nuisance tripping.
• New installations that demand a compact MCCB with robust short-circuit capability and easy compatibility with Square D load centers.

How it protects your system

The FAL36040’s thermal-magnetic trip mechanism combines a thermal element that senses overcurrent with a magnetic element that reacts to high fault currents. The result is:

• Consistent overload protection, reducing insulation and conductor wear over time.
• Fast, decisive short-circuit interruption to limit arc energy and protect downstream devices.
• Predictable performance across a variety of panel environments and electrical loads, helping maintain system reliability.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: FAL36040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re performing a controlled upgrade in an existing panel or planning a new installation, the Square D FAL36040 delivers dependable protection with a space-conscious design and a trusted trip system. It’s a practical, long-term solution for professionals who value compatibility, performance, and panel efficiency—delivering peace of mind for electrical systems in residential, commercial, and light industrial settings.