Square D QOB340 Mini Circuit Breaker 40A 3 Pole 10kA Bolt-On Mount 120/240VAC

Description

Features

• Specifically engineered with a robust bolt-on mounting mechanism, this circuit breaker creates a high-torque, permanent mechanical connection to the NQ or NQOD load center bus bar. This eliminates the risk of vibration-induced loosening common in industrial environments, ensuring uninterrupted power flow and long-term reliability for your mission-critical electrical infrastructure.
• Designed for 3-phase applications, the internal common trip bar ensures that if a fault occurs on any single phase, all three poles disconnect simultaneously. This vital safety feature prevents "single-phasing" conditions which can cause expensive motors and commercial HVAC compressors to overheat and fail prematurely, saving you thousands in equipment replacement costs.
• Rated for 40 Amps at 240V AC, this thermal-magnetic breaker is the industry standard for protecting medium-duty machinery, commercial kitchen appliances, and multi-wire branch circuits. It provides sensitive protection against both short circuits and sustained thermal overloads, maintaining the delicate balance between high-performance output and circuit safety.
• The integrated Visi-Trip window displays a high-visibility red indicator flag when the breaker has tripped due to an electrical fault. This allows facility managers to scan dense electrical panels at a glance, drastically reducing troubleshooting time and ensuring that power can be restored to production lines or office blocks with minimal operational delay.
• Fully tested to meet UL 489 and CSA C22.2 standards, this QO-style breaker is a genuine Schneider Electric / Square D component that satisfies the most stringent insurance and municipal code requirements. Utilizing genuine OEM parts for your electrical distribution ensures your facility remains compliant with National Electrical Code (NEC) standards and maintains your property's safety certifications.

Documentation & Downloads

Specifications