Square D QO3100BNS 100A 3P 240V Circuit Breaker, QO, NEMA 1 | AmpState

Engineered for everyday electrical work, the Square D QO3100BNS 100A 3P 240V circuit breaker delivers dependable protection for your panelboards, load centers, and distribution circuits. This QO-series breaker, housed in a NEMA 1 enclosure, is designed for indoor use in dry environments and integrates seamlessly with existing QO panels to keep your electrical system running smoothly.

Why this breaker stands out

• Original BOM alignment: Ideal for replacement projects, this 100 A, 3-pole 240 V unit ensures your bill-of-materials stays consistent with the original part number, reducing documentation errors and installation delays.
• Spare-ready for service calls: Keep a compliant spare on hand so routine maintenance or unexpected outages don’t disrupt downstream circuits.
• Broad compatibility within the QO ecosystem: Specifically designed to fit panelboards, load centers, and distribution systems that support QO breakers, making upgrades and expansions straightforward.
• NEMA 1 indoor enclosure: Built to stand up to typical indoor environments, offering reliable protection where dust and incidental contact are considerations.
• Clear identification for quick procurement: Part number QO3100BNS is easy to reference during inspections, stocking, and field service.

The QO3100BNS is a practical choice for electricians and facility managers who value compatibility, reliability, and streamlined maintenance. Whether you’re replacing a failed breaker in an existing installation or stocking a spare that mirrors your original configuration, this unit keeps your system aligned with the original design intent.

Available from AmpState. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Specifications at a glance:

• Part Number: QO3100BNS
• Type: Circuit Breaker, QO series
• Amperage: 100 A
• Poles: 3
• Voltage: 240 V
• Enclosure: NEMA 1 (indoor)