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Square D Q4L3350 - Molded Case Circuit Breaker 350A 3P (25kA AIC)

Square D
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Square D Q4L3350 is a molded case circuit breaker designed for providing reliable thermal-magnetic protection in three-phase industrial power distribution systems. It features a 350A current rating and a 240V voltage rating, housed within a compact 400A frame with dimensions of 279.4 mm H x 152.4 mm W x 148.34 mm D and a weight of 16.51 lb. The breaker is constructed for bolt-on connection with lug terminals, supports wire sizes from 1/0 AWG to 600 MCM, and operates effectively across a temperature range of -25 to 70 °C. It complies with CSA, IEC, and UL standards and is typically applied in panelboards, switchboards, motor control centers, industrial enclosures, combination starters, and busway plug-in units, offering an interrupting capacity of 25kA at 240V.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Standard, Thermal Magnetic Protection
  • Voltage Rating: 240V AC
  • Current Rating: 350A
  • Dimensions: 279.4 mm (H) x 152.4 mm (W) x 148.34 mm (D)
  • Standards: CSA, IEC, UL Listed
  • Applications: Busway Plug-In Units, Combination Starters, Industrial Enclosures, Motor Control Centers, Panelboards, Switchboards
  • Switch Type: Circuit Breaker
  • Configuration: Bolt-On
  • Temp Rating: -25 to 70 °C
  • Phase: 3
  • Voltage: 240V
  • Amperage: 350A
  • AIC rating: 25kA @ 240V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 400A/Q4
  • Breaker Type: Standard
  • MCM Size: Min. 1/0 AWG, Max. 250/600 MCM
  • Mounting: Panel Mount
  • Hz: 50/60 Hz
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: ABC
  • Compatible Frames: Q4L Series
  • Installation Type: Fixed
  • Breaker Frame: 400A
  • Operating Temperature Maximum Celsius: 70 °C
  • Certification: CSA, IEC, UL Listed


Product Identification
  • UPC: 785901649274
  • GTIN: 00785901649274