HFD1100L | Circuit Breaker | 100A | 1-Pole | 277V

Meet the HFD1100L, a purpose-built industrial circuit breaker designed to protect critical 277V single-pole circuits with dependable overcurrent protection. This 100A device is ideal for maintenance, retrofit, and replacement projects where precise specifications must be matched to keep panels and equipment safe and compliant.

Key specifications at a glance

• Amperage: 100A
• Poles: 1-Pole
• Voltage: 277V
• Part number reference: HFD1100L

The HFD1100L is built for environments that demand reliability and consistency. With a clear focus on single-pole protection, it safeguards one hot conductor in 277V circuits—common in commercial lighting and other industrial applications—helping to prevent damage from overloads and short circuits.

Why choose the HFD1100L

Choosing this breaker means opting for a unit that aligns with exact specifications for compatibility and performance. The 100A rating comfortably protects feeders and branch circuits in medium-load panels, while the single-pole design simplifies integration in appropriate configurations. This is not a generic substitute—it's a precise, replaceable component you can trust to maintain system integrity.

Ideal for

• Electrical contractors performing panel upgrades, maintenance, or retrofits in facilities with 277V single-phase distribution.
• Facilities managers replacing aging breakers to restore reliable protection in lighting and auxiliary circuits.
• OEMs and integrators incorporating a verified, compatible 100A, 1-pole 277V breaker into equipment and control panels.

Usage notes and compatibility

Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring you match the exact model to your panel and circuit requirements.

Practical tips for installation and performance

• Power down the system and follow your site’s lockout/tagout procedures before replacing or installing the breaker.
• Verify that the target circuit operates at 277V and remains within the 100A protection range to avoid nuisance trips or under-protection.
• Ensure proper mounting and electrical connections per manufacturer guidelines to maintain optimal trip performance and reliability.
• Keep a record of the part number (HFD1100L) for future replacements or maintenance to streamline compatibility checks.