Square D QOB340 40A 3-Pole Standard – Bolt-On – 120/240V

The Square D QOB340 40A 3-Pole Standard – Bolt-On – 120/240V  circuit breaker provides dependable 40 Amp, 3-pole thermal-magnetic protection for residential and commercial 120/240V AC systems. Designed for Square D QO loadcenters and NQ/NQOD panelboards, this bolt-on breaker features a 10 kAIC interrupt rating, ensuring reliable overcurrent protection. The thermal-magnetic trip mechanism and Visi-Trip indicator allow for fast fault identification and troubleshooting. With support for copper and aluminum conductors up to AWG 2, it delivers durable and safe performance for branch circuits in both commercial and residential applications.

Voltage and Rating

• Current Rating: 40 Amps
• Voltage Rating: 120/240 Volts AC
• Interrupting Capacity: 10 kAIC
• Frequency: 50/60 Hz

Key Specifications

• Breaker Type: Standard (thermal-magnetic)
• Number of Poles: 3-Pole
• Mounting Type: Bolt-On
• Product Range: QO (for Square D QO loadcenters, NQ and NQOD panelboards and equipment)
• Application: Residential and commercial branch circuit protection
• Special Features: Thermal-magnetic trip, Visi-Trip indicator
• Ratings: UL Listed, CSA

Technical Specifications

• Connection Type: Bolt-on
• Wire Size: AWG 8–2 Cu/Al
• Terminal Tightening Torque: 44.3 lb-in
• Operating Mechanism: Thermal-magnetic
• Interrupt Rating: 10 kAIC
• Certifications: UL Listed, CSA

Product Data

• Manufacturer: Schneider Electric
• Brand: Square D
• Model Number: QOB340
• UPC: 785901417149

Dimensions

• • Height: 3.1 in
  • Width: 2.2 in
  • Depth: 2.9 in
  • Weight: 0.800 lbs

Returns are easy

You may return items within 10 days of delivery for a refund.

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My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.