Square D | PBPFA4B100A040 | Circuit Breaker | 100A | 600V

Keep electrical systems protected with precision using Square D PBPFA4B100A040 circuit breaker. Engineered for 100A at 600V, this breaker is the exact part number match for installers seeking a precise compatibility reference and dependable overcurrent protection in commercial or industrial panels.

Key specifications

• Amperage rating: 100 A
• Voltage rating: 600 V
• Part number: PBPFA4B100A040
• Compatibility: designed for Square D panels that accept the PBP family; the part number is the best reference for matching fit and ratings

What sets this apart

This is not a generic replacement. The PBPFA4B100A040 is purpose-built to align with Square D equipment, ensuring correct mounting, terminal connection, and trip characteristics. By choosing the exact part number, you minimize the risk of fit issues during retrofit or replacement and maintain consistent protection across your distribution setup.

Ideal use cases

• Maintenance and service on existing 100A circuits in commercial or light industrial panels
• Retrofit projects where a precise 100A/600V protection device is required to match the panel’s protection scheme
• Replacement for worn or obsolete breakers in compatible Square D panels to preserve electrical reliability

Fit, compatibility, and installation notes

Fit and ratings verification: Confirm fit and ratings before ordering. The part number is the best reference for compatibility, helping ensure the breaker will seat correctly and trip as designed in your panel.

Practical considerations: plan for a de-energized workspace, follow your panel’s installation procedures, and label the circuit clearly after replacement. For any field installation, rely on a qualified electrician to validate mounting, wiring, and safety compliance.

Choose the Square D PBPFA4B100A040 for a precise, reliable 100A, 600V circuit protection solution that aligns with your existing Square D infrastructure and supports straightforward maintenance and replacements.