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Square D MHB36350 - Molded Case Circuit Breaker 350A 600V 3-Pole

Square D
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Square D MHB36350 is a 3-pole molded case circuit breaker from the I-Line family, designed for thermal magnetic protection of electrical circuits. It is rated for 600V AC, 350A continuous current, and provides LI (Long-Time and Instantaneous) trip functions with a 65kA interrupting capacity at 480V. The unit features an M Frame size, I-Line style plug-in connection, and measures 8.05 inches deep, 8.27 inches wide, and 12.86 inches high, weighing 40 lb. This breaker complies with industry standards for overcurrent protection in commercial and industrial power distribution systems. It is typically applied in panelboards, switchboards, and motor control centers requiring reliable circuit isolation and fault interruption.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic
  • Voltage Rating: 600V AC
  • Current Rating: 350A
  • Dimensions: Depth 8.05 in (204.47 mm), Width 8.27 in (210.06 mm), Height 12.86 in (326.64 mm)
  • Standards: UL, CSA, NEMA
  • Applications: Industrial power distribution, panelboards, switchboards, motor control centers
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 8.05 x 8.27 x 12.86 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 350A
  • AIC rating: 65kA@480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: I-Line
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: I-Line
  • Bus Type: I-Line
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Plug-In
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 350A
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: 350A
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 350A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: Not specified
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: I-Line
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: M Frame
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: M Frame
  • Current Rating: 350A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available