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Square D MHL36450V - Molded Case Circuit Breaker 450A 600V 3-Pole

Square D
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The Square D MHL36450V is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It is rated for 600V AC, 450A continuous current, and provides a 65kA interrupting capacity at 480V AC. This unit features a thermal magnetic trip mechanism with LI (Long-Time and Instantaneous) protection functions, housed in an M Frame with feed-thru connections and a weight of 40 lb. The breaker measures 12.86 inches in height, 8.27 inches in width, and 8.05 inches in depth, constructed for panelboard or switchboard installation. It complies with industry standards for 3-phase systems and is suited for heavy-duty motor, feeder, and main breaker applications in commercial and industrial facilities.

Key Features & Specifications
  • Type: MHL Series Molded Case Circuit Breaker
  • Voltage Rating: 600V AC
  • Current Rating: 450A
  • 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, motor protection, feeder circuits
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 14 x 10 x 9 in (approx)
  • Phase: 3
  • Voltage: 600V
  • Amperage: 450A
  • AIC rating: 65kA@480V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Panel Type: Panelboard/Switchboard
  • Breaker Type: Molded Case
  • Control Voltage Minimum: N/A
  • Control Voltage Maximum: N/A
  • MCM Size: 500 MCM max (typical)
  • Metal Type: Copper/Steel
  • Panel Style: NEMA 1
  • Bus Type: Aluminum/Copper
  • Fuse Class: N/A
  • Insulation Temperature: 105°C
  • Inductance: N/A
  • Impedance: N/A
  • Barrels: N/A
  • Class Rating: N/A
  • Diameter: N/A
  • Velocity: N/A
  • Clip Center: N/A
  • Clas: N/A
  • Mounting: Bolt-On
  • Hz: 50/60 Hz
  • Coil Material: N/A
  • Horse Power: 200 HP @ 480V (typical)
  • Aux Contacts: Optional
  • CPT: Optional
  • Full Load Amps: 450A
  • Dist Voltage: 600V
  • Bucket Size: N/A
  • Bucket Style: N/A
  • Bucket Type: N/A
  • Full Load Amp Maximum: 450A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open
  • Relay Style: N/A
  • Coil Voltage Minimum: N/A
  • Wire: Copper/Aluminum
  • Amperage Maximum: 450A
  • Amperage Minimum: 0A
  • Nema Rating: NEMA AB-1
  • Switch Style: N/A
  • Wire Size: 500 MCM max
  • Certification: UL 489, CSA C22.2
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Feed-Thru
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA
  • Compatible Frames: M Frame
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: N/A
  • Breaker Frame: M Frame
  • Current Rating: 450A
  • Reverse Standoff Voltage: N/A
  • Watts: N/A
  • Peak Pulse Current: N/A
  • Breakdown Voltage (MIN VBR@IT ) (V): N/A
  • Breakdown Voltage (VBR@IT) (V): N/A
  • Polarity: N/A
  • Operating Temperature Maximum Celsius: 40°C
  • Max Clamp Voltage: N/A
  • On-State Current: N/A


Product Identification
  • UPC: Not provided
  • GTIN: Not provided