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Westinghouse JB22250SMW - Molded Case Breaker 250A 600V

Westinghouse
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Westinghouse JB22250SMW JB is a 2-pole molded case circuit breaker from the AB DE-ION family, designed for instantaneous magnetic-only protection in industrial power distribution systems. It is rated for 600V AC, 250A continuous current, and a 22kA interrupting capacity at 480V, with a bolt-on connection for secure panel mounting. This single-phase unit weighs 17 lb and features a compact molded case construction for durability in demanding environments. It complies with industry standards for overcurrent protection, ensuring reliable performance in high-fault applications. Typical uses include motor control centers, switchboards, and industrial machinery requiring precise magnetic trip coordination.

Key Features & Specifications
  • Type: Molded Case, Magnetic Only, Instantaneous Trip
  • Voltage Rating: 600V AC
  • Current Rating: 250A
  • Dimensions: Standard molded case form factor
  • Standards: UL, CSA, NEMA compliant
  • Applications: Motor control, switchboards, industrial panels
  • Switch Type: Circuit breaker
  • Configuration: 2-pole, single-phase
  • Coil Voltage Maximum: Not applicable (magnetic only)
  • Temp Rating: Standard industrial range
  • Shipping Dimensions: Varies by packaging
  • Phase: 1
  • Voltage: 600V
  • Amperage: 250A
  • AIC rating: 22kA@480V
  • Connection: Bolt-On
  • Poles: 2
  • Protection: Magnetic Only
  • Functions: I - Instantaneous
  • Frame Size: JB
  • Trip Type: Instantaneous magnetic
  • Panel Type: Standard industrial
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Copper or aluminum terminals
  • Panel Style: Bolt-on
  • Bus Type: Standard
  • Fuse Class: Not applicable
  • Insulation Temperature: Standard
  • Inductance: Not applicable
  • Impedance: Not specified
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Bolt-On
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 250A
  • Dist Voltage: 600V
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 250A
  • Full Load Amp Minimum: 0A
  • Enclosure: Open type
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 250A
  • Amperage Minimum: 0A
  • Nema Rating: Standard
  • Switch Style: Toggle
  • Wire Size: Not specified
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Bolt-On
  • Terminal Connection: Bolt-On
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Single-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: JB series
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: JB
  • Current Rating: 250A
  • 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