Square D | FAB34100 | Circuit Breaker | 100A | 3-Pole | 480V | Bolt-On

Meet the Square D FAB34100 circuit breaker—a robust, bolt-on protector engineered for 100A, 3-pole, 480V three-phase power systems. Built for reliability in maintenance, retrofit, and replacement projects, this breaker slides into compatible panels that support bolt-on devices. The FAB34100 is your best compatibility reference, so confirm fit and ratings before ordering to ensure a seamless upgrade.

Key features and benefits

• 100A protection for critical feeders and motors in three‑phase networks.
• 3‑Pole design supports balanced distribution across all three phases, essential for reliable motor starting and load sharing.
• 480V operation tailored for industrial and commercial environments with higher voltage distribution.
• Bolt-On mounting provides secure, straightforward installation with compatible panels and minimal field modification.
• Backed by the trusted Square D lineage, offering predictable trip characteristics and long-term serviceability.
• Specifically suitable for maintenance, retrofit, and replacement projects where exact FAB34100 compatibility is required.

Use cases: where this breaker shines

• Replacing aged or failed breakers in 480V, three‑phase equipment racks, switchboards, and control panels.
• Retrofitting existing installations to modern protection while preserving current panel architecture.
• New or expanded 480V, three‑phase deployments that need a bolt‑on, 3‑pole protection solution.
• Maintenance workflows that benefit from a clearly referenced part number (FAB34100) to avoid misfits.

Compatibility and installation guidance

• Before ordering, verify amperage (100A), poles (3-Pole), voltage (480V), and mounting (Bolt-On) match your panel requirements.
• Use FAB34100 as the primary compatibility reference when shopping for panels that accept bolt-on breakers from Square D.
• Review your panel’s installation instructions to ensure proper bus alignment and mounting hardware for bolt-on devices.

Practical installation tips

• Power down and lockout/tagout before handling any breaker components.
• Confirm the panel acceptance of bolt-on devices and the specific footprint for FAB34100.
• Secure the breaker with the appropriate mounting hardware and follow panel manufacturer torque guidelines if provided.

Designed for professionals who need dependable protection in 480V three‑phase environments, the Square D FAB34100 delivers clear, specific compatibility and straightforward installation. If your application calls for a 100A, 3‑pole, bolt-on solution, this breaker offers a precise, trusted option that aligns with established industrial electrical practices.