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Square D Q1B340VH - Molded Case 40A 240V 3-Pole Breaker

Square D
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Square D Q1B340VH is a 3-pole molded case circuit breaker designed for overcurrent protection in commercial and industrial power distribution systems. It is rated for 40 amps at 240VAC with a 22kA interrupting capacity, utilizing a thermal magnetic trip unit that provides long-time and instantaneous (LI) protection functions. The breaker features a bolt-on connection for secure panel mounting and weighs 2 lb, part of the Q1B series with a compact 3-phase construction. It is UL listed and HACR rated for compatibility with HVAC equipment, ensuring compliance with industry safety standards. This breaker is suited for branch circuit protection in panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: Molded Case
  • Family: Q1B Series
  • Type: Q1B
  • Weight: 2 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 240V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 22kA@240V
  • Phase: 3
  • Current Rating: 40A
  • Amperage: 40 Amps
  • Voltage: 240 VAC
  • Mounting Type: Bolt-On
  • Interrupt Rating: 22 kA at 240 VAC
  • Series/Frame: Q1B
  • Trip Unit: Thermal Magnetic
  • HACR Rated: Yes
  • Certifications: UL Listed
  • Application: Commercial/Industrial Circuit Protection