Square D BDL36100 100A 3-Pole 347 V Circuit Breaker

Meet the Square D BDL36100 — a purpose-built protection device for demanding 3-phase power systems. With a 100 A rating and three poles, this circuit breaker is engineered to interrupt fault currents on 347 V service, safeguarding equipment and personnel in commercial and light industrial environments.

Designed by Square D (Schneider Electric), the BDL36100 delivers reliable overcurrent protection where three-phase distribution is used, including lighting, motors, and HVAC circuits fed from 347 V systems. Its 3-pole configuration ensures simultaneous disconnection of all conductors, preventing phase-to-phase faults and reducing risk during a fault event.

Key specifications

• Current rating: 100 A
• Poles: 3
• Voltage rating: 347 V
• Part number: BDL36100
• Brand: Square D

Why this matters

In commercial electrical distributions, 347 V three-phase service is common for lighting and other heavy loads. The Square D BDL36100 is built to withstand the demands of continuous operation, while providing predictable tripping characteristics when overloads or short circuits occur. This selection helps minimize downtime and protects downstream equipment such as motors, control panels, and lighting gear.

Where it fits

Ideal for panels and systems designed for Square D BDL-series breakers that require a 100 A, 3-pole, 347 V device. Use in installations where a robust, reliable 3-phase protection solution is needed and where compliance with standardized Square D components matters for panel compatibility and future serviceability.

Practical usage tips

• Confirm your panel accepts 3-pole 347 V Square D breakers and that the BDL36100 matches the panel’s listing.
• Label the protected circuit clearly with the 100 A rating and 347 V application to aid maintenance and safety audits.
• Pair with appropriate overcurrent protection coordination practices to minimize nuisance trips while ensuring protection for motors and feeders.