Square D | FI360451021 | Circuit Breaker | 100A | 3-Pole | 600V

Meet the Square D FI360451021 Circuit Breaker—a precise, reliable safeguard for three-phase electrical systems. With a 100-amp rating and a 3-pole design, this 600V breaker is built for demanding industrial and commercial environments where dependable short-circuit protection matters most. It’s the trusted choice for maintenance, retrofit, and replacement projects that require a like-for-like, high-performance component.

Why this FI360451021 breaker stands out

• Exact electrical fit for 3-phase, 100A service—designed to protect feeders and downstream equipment in motor control centers, panelboards, and distribution panels.
• 3-pole configuration supports balanced three-phase loads common in industrial settings.
• 600V rating provides the surge and fault protection needed for higher-voltage applications.
• Brand reliability—Square D components are engineered to harmonize with existing Square D and Schneider Electric systems, helping ensure consistent performance and smoother panel integration.
• Best reference for compatibility—the part number FI360451021 is the most reliable way to confirm fit with your panel or switchgear.

Ideal use cases

• Maintenance and service work on commercial or industrial panels where a like-for-like replacement is required.
• Retrofit projects upgrading outdated breakers to modern, standardized Square D components.
• New installations in 3-phase, 600V systems needing robust 100A protection for critical motors and feeders.
• Panel upgrades in facilities seeking consistent, predictable trip characteristics and easier asset management.

Practical guidance for ordering

Before purchasing, confirm fit and ratings with your panel labeling and electrical schematics. The FI360451021 part number serves as the best reference for compatibility, helping you avoid mismatches and ensure a smooth installation.

Technical at a glance

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 600V
• Brand: Square D
• Part Number: FI360451021