Square D QOB3100 - 100A, 3-Pole, Circuit Breaker

The Square D QOB3100—a 100A, 3-Pole Circuit Breaker—delivers steadfast overcurrent protection for demanding electrical systems. Its three-pole configuration provides synchronized protection across all three phases, making it an ideal fit for panelboards, switchboards, and control panels in industrial, commercial, and OEM environments. Built to endure the rigors of distribution panels and motor control centers, this breaker helps keep equipment safe and downtime to a minimum.

Key advantages

• Three-pole design delivers coordinated protection across all phases for three-phase circuits in panelboards, switchboards, and control panels.
• 100-amp rating protects distribution and motor circuits while enabling reliable operation in mid-size applications.
• Rugged Square D construction built for dependable performance in harsh industrial and commercial environments.
• Compact footprint fits standard enclosures, simplifying replacement and upgrading in existing systems.

Ideal applications

• Industrial panelboards and motor control centers that require reliable three-phase protection.
• Commercial electrical rooms with three-phase equipment and distribution panels.
• OEM assemblies needing a compact, three-pole circuit breaker for safe, controlled power protection.

How it protects your system

When current on any phase exceeds 100A, the QOB3100 interrupts the circuit to prevent damage to wiring and connected equipment, reducing risk and helping with fault isolation in distribution panels and motor control centers. This ensures safer operation and easier maintenance in everyday, real-world applications.

Specifications at a glance

• Current rating: 100A
• Poles: 3
• Breaker type: Circuit Breaker

Installation and compatibility tips

Ensure the QOB3100 is compatible with your panelboard, switchboard, or control panel and fits the intended mounting arrangement. Follow all manufacturer installation guidelines and local electrical codes. If replacing an existing breaker, verify form factor and trip characteristics with a qualified electrician to ensure a seamless upgrade.

Choose the Square D QOB3100 for dependable three-phase protection in distribution panels and motor control centers. Add this 100A, 3-Pole breaker to your system and safeguard your operation with a trusted, durable solution.