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Square D MHL3640025DC - Molded Case Breaker 400A 600V 3-Pole

Square D
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Square D MHL3640025DC is a 3-pole molded case circuit breaker from the MHL Series, designed for thermal magnetic overcurrent protection in industrial power distribution systems. It is rated for 400A continuous current at 600VAC with a 20kA interrupting capacity at 500VAC, providing LI (Long-Time and Instantaneous) protection functions. The unit features an M Frame construction, feed-thru connection, and measures 8.05 in depth, 8.27 in width, and 12.86 in height, weighing 55 lb. This breaker complies with industry standards for 3-phase applications and is suited for motor control centers, switchboards, and heavy industrial equipment requiring reliable overcurrent protection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic, MHL Series
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: Depth 8.05 in (204.47 mm), Width 8.27 in (210.06 mm), Height 12.86 in (326.64 mm)
  • Standards: UL 489, CSA C22.2 No. 5
  • Applications: Industrial power distribution, motor control centers, switchboards
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 8.05 x 8.27 x 12.86 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 20kA@500V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Not specified
  • Breaker Type: MHL
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • 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: Fixed
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 400A
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: 400A
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 400A
  • Amperage Minimum: 400A
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Feed-Thru
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL 489, CSA C22.2 No. 5
  • Compatible Frames: M Frame
  • Installation Type: Panelboard or Switchboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: M Frame
  • Current Rating: 400A
  • 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 specified
  • GTIN: Not specified