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NEF431040STE3 - Molded Case Circuit Breaker 400A 480V AC

United Fuses
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NEF431040STE3 is a high-performance industrial circuit breaker designed for overcurrent protection in demanding electrical systems. It is rated for 480V AC and 400A, ensuring robust fault interruption capabilities. The unit weighs 5.19 lb and features a compact, durable construction with a molded case and thermal-magnetic trip mechanism. It complies with UL 489 and CSA standards, making it suitable for use in commercial and industrial power distribution panels, motor control centers, and switchboards.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, thermal-magnetic trip
  • Voltage Rating: 480V AC
  • Current Rating: 400A
  • Weight: 5.19 lb
  • Standards: UL 489, CSA
  • Applications: Power distribution, motor control centers, switchboards
  • Switch Type: Thermal-magnetic
  • Configuration: 3-pole
  • Coil Voltage Maximum: N/A
  • Temp Rating: 40°C
  • Shipping Dimensions: N/A
  • Phase: 3-phase
  • Voltage: 480V AC
  • Amperage: 400A
  • AIC rating: 65kA at 480V AC
  • Connection: Line and load lugs
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Overload and short-circuit protection
  • Frame Size: 400A frame
  • Trip Type: Thermal-magnetic
  • Panel Type: NEMA 1
  • Breaker Type: Fixed mount
  • Control Voltage Minimum: N/A
  • Control Voltage Maximum: N/A
  • MCM Size: N/A
  • Metal Type: Steel
  • Panel Style: Enclosed
  • Bus Type: 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: Panel mount
  • Hz: 60 Hz
  • Coil Material: N/A
  • Horse Power: N/A
  • Aux Contacts: N/A
  • CPT: N/A
  • Full Load Amps: 400A
  • Dist Voltage: N/A
  • Bucket Size: N/A
  • Bucket Style: N/A
  • Bucket Type: N/A
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: N/A
  • Enclosure: NEMA 1
  • Relay Style: N/A
  • Coil Voltage Minimum: N/A
  • Wire: Copper
  • Amperage Maximum: 400A
  • Amperage Minimum: N/A
  • Nema Rating: NEMA 1
  • Switch Style: Thermal-magnetic
  • Wire Size: 4/0 AWG to 500 MCM
  • Certification: UL 489, CSA
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Lug
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, CSA
  • Compatible Frames: N/A
  • Installation Type: Panel mount
  • Item QTY: 1
  • Nema Starter Size: N/A
  • Breaker Frame: 400A
  • Current Rating: 400A
  • 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
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