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Square D XS4P18PA370B - Molded Case Circuit Breaker 18A 600V

Square D
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Square D XS4P18PA370B is a heavy-duty industrial circuit breaker designed for overcurrent protection in power distribution systems. It is rated for 600V AC and 18A continuous current, housed in a compact molded case with a 5.19 lb weight for robust yet manageable installation. The breaker features a thermal-magnetic trip mechanism for precise fault response and is UL 489 listed for safety compliance. This unit is commonly used in motor control centers, panelboards, and switchboards for commercial and industrial applications.

Key Features & Specifications
  • Type: Molded case circuit breaker, thermal-magnetic trip
  • Voltage Rating: 600V AC
  • Current Rating: 18A
  • Dimensions: Compact molded case
  • Standards: UL 489
  • Applications: Motor control centers, panelboards, switchboards
  • Switch Type: Circuit breaker
  • Configuration: Fixed mount
  • Coil Voltage Maximum: Not applicable
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Standard
  • Phase: 3-phase
  • Voltage: 600V AC
  • Amperage: 18A
  • AIC rating: 18kA at 480V
  • Connection: Line and load lugs
  • Poles: 3
  • Protection: Overcurrent and short circuit
  • Functions: Thermal-magnetic trip
  • Frame Size: 100A frame
  • Trip Type: Thermal-magnetic
  • Panel Type: Distribution panel
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Steel case
  • Panel Style: Industrial
  • Bus Type: Copper
  • Fuse Class: Not applicable
  • Insulation Temperature: 105°C
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Fixed
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: 10 HP at 480V
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 18A
  • Dist Voltage: 600V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 18A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Coil Voltage Maximum: Not applicable
  • Wire: Copper/Aluminum
  • Amperage Maximum: 18A
  • Amperage Minimum: 0A
  • Nema Rating: 1
  • Switch Style: Toggle
  • Wire Size: 14 AWG to 4 AWG
  • Certification: UL 489
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, CSA
  • Compatible Frames: 100A frame
  • Installation Type: Panel mount
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 100A
  • Current Rating: 18A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not applicable
  • 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: 785901234567
  • GTIN: 00785901234567