Square D | FI360901021 | Circuit Breaker | 90A | 3-Pole | 600V

Meet the Square D FI360901021 circuit breaker—a dependable 90A, 3-pole protective device designed for demanding panels in maintenance, retrofit, and replacement projects. Built to handle up to 600V, this unit provides reliable protection for 3-phase systems where precise specifications matter.

Key specifications

• Amperage: 90A
• Poles: 3-Pole
• Voltage: 600V

Why this model matters

• Exact compatibility is driven by the FI360901021 part number. Use it as the primary reference when matching to your panel, ensuring the same amperage, pole count, and voltage rating before ordering.
• Designed for maintenance, retrofit, and replacement scenarios, making it a practical choice when upgrading or maintaining existing Square D installations without compromising safety or performance.

Ideal use cases

• Retrofits in legacy Square D panels that require a 90A, 3-pole, 600V protection device.
• Emergency replacements for failed or obsolete breakers in 3-phase electrical systems.
• New installations or upgrades in commercial or light industrial settings where precise spec matching is essential.

Practical checks and installation notes

• Always verify fit and ratings on the panel labeling before ordering to ensure seamless compatibility with your existing electrical workspace.
• Cross-check the part number FI360901021 against your panel's documentation to avoid mismatches that could affect protection performance.
• Follow standard electrical safety practices during installation, including power-down procedures and appropriate PPE to protect personnel and equipment.

For technicians and facilities managers, this Square D FI360901021 circuit breaker offers a reliable, specification-aligned solution that supports durable protection of 3-phase circuits at 600V. Its clear reference in service manuals and straightforward compatibility approach help streamline maintenance and retrofits, reducing downtime and uncertainty when sourcing exact replacement parts.