Eaton | HFD4040L | Circuit Breaker | 40A | 4-Pole | 600V

Meet the Eaton HFD4040L Circuit Breaker — a robust 40A, 4-pole device rated for up to 600V, designed for dependable isolation and protection in demanding electrical systems.

Built for maintenance, retrofit, and replacement, this part plays a critical role in safeguarding equipment and keeping panels compliant and safe. The HFD4040L is Eaton's trusted reference for compatibility when you need a precise match to existing infrastructure.

Key specifications

• Amperage: 40A
• Poles: 4-Pole
• Voltage rating: 600V
• Reference: Part number HFD4040L is the best compatibility reference
• Applications: Maintenance, retrofit, replacement in compatible electrical panels and distributions

Why this 4-pole design matters

In three-phase systems that require full disconnection of all conductors, a 4-pole breaker provides simultaneous isolation of each line. This helps meet safety standards, simplifies maintenance, and minimizes fault propagation during trips in industrial and commercial power distributions.

Unique value you won’t get from generic replacements

• Official Eaton part — designed to align with Eaton panels and distribution boards, reducing fit issues and downtime.
• Clear compatibility reference — use the HFD4040L part number to verify you’re ordering the exact replacement for your current setup.
• Focused for 600V systems — provides appropriate protection for higher voltage environments common in industrial applications.
• Retrofit-friendly for maintenance schedules — a straightforward swap that supports ongoing reliability without major panel changes.

Use cases and ideal fit

• Replacing worn or tripped breakers in 600V, multi-pole distribution panels.
• Retrofits where a 4-pole 40A specification is required to support new equipment with four conductors.
• Upgrade projects in facilities that standardize on Eaton components to streamline parts management.

Before ordering, confirm fit and ratings against your panel's specification. The HFD4040L is the most reliable reference for compatibility, ensuring you get the correct breaker for safe, compliant operation.

Note: For proper installation, engage a qualified electrician, power down the equipment, and follow all local electrical codes. This description provides product insights to help you evaluate suitability and plan a maintenance or retrofit project with confidence.