Square D EDB34020LH 20A 3-Pole 277 V Circuit Breaker

The Square D EDB34020LH 20A 3-Pole 277 V Circuit Breaker is engineered to deliver precise, reliable protection for commercial electrical installations that rely on a 277 V, three-phase system. With a 20-amp rating and three poles, this breaker safeguards three synchronized circuits in a single, compact unit, helping reduce panel clutter while ensuring consistent trip performance across all phases.

Key advantages

• Three-pole protection ensures simultaneous disconnection of all three phases, enhancing safety and reducing the risk of partial circuit faults.
• 277 V rating is ideal for commercial lighting, control circuits, and equipment powered from 277 V distribution systems commonly found in offices, retail spaces, and industrial environments.
• 20 A current rating provides appropriate overcurrent protection for moderate-load circuits while minimizing nuisance trips on normal operation.
• Part number EDB34020LH guarantees you’re selecting the exact Square D component designed for compatibility with Square D panels and field replaceability.
• Brand heritage from Square D (Schneider Electric) brings dependable performance, consistent trip characteristics, and a long service life in demanding commercial settings.

Ideal use cases

• Protecting three separate 20 A branch circuits in a 277 V commercial lighting or small equipment installation.
• Upgrading or replacing aging breakers in mid-sized panel boards that serve offices, educational facilities, retail storefronts, or light industrial spaces.
• Providing a clean, centralized solution for three-phase electrical systems where coordinated shutdown of all phases is crucial for safety and compliance.

Why this model stands out

• Designed specifically for 277 V three-phase environments, offering predictable, balanced protection across all phases.
• Compact three-pole form factor helps streamline panel layout without sacrificing protection or performance.
• Clear part-number traceability (EDB34020LH) simplifies inventory management and field replacements in facility maintenance programs.

Installation and compatibility tips

• Use this breaker in Square D panels or enclosures that accept EDB-type three-pole devices and 277 V applications.
• Ensure the electrical system is de-energized and follow all local codes and the panel’s installation instructions when replacing or installing breakers.
• Verify that the connected circuits are suited to a 20 A rating and that the load characteristics (lighting, control circuits, or equipment) match expected demand to prevent nuisance trips.

For reliable, targeted protection of three 277 V circuits, the Square D EDB34020LH 20A 3-Pole 277 V Circuit Breaker delivers precise trip performance, easy field replacement, and a trusted brand legacy designed to keep commercial electrical systems running smoothly.