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Siemens JJ3-B250 - Molded Case 250A Industrial Breaker

Siemens
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Siemens JJ3-B250 Circuit Breaker - Molded Case 250A Industrial Breaker The Siemens JJ3-B250 is a molded case circuit breaker designed for primary overcurrent and short-circuit protection in industrial power distribution systems. It is rated for 250 amps at 600 volts AC, providing reliable interruption of fault currents. This three-pole breaker features a compact, insulated case construction weighing 15 lb, with a thermal-magnetic trip mechanism for precise overload and short-circuit response. It complies with UL 489 and CSA standards, ensuring safe operation in demanding environments. Typical applications include motor control centers, panelboards, and switchboards in manufacturing plants and commercial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, thermal-magnetic trip
  • Voltage Rating: 600V AC
  • Current Rating: 250A
  • Dimensions: Standard molded case size
  • Standards: UL 489, CSA
  • Applications: Industrial power distribution, motor control centers
  • Switch Type: Toggle
  • Configuration: Three-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: Varies by packaging
  • Phase: Three-phase
  • Voltage: 600V AC
  • Amperage: 250A
  • AIC rating: 25kA at 480V
  • Connection: Line and load lugs
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Circuit isolation and protection
  • Frame Size: JJ3
  • Trip Type: Thermal-magnetic
  • Panel Type: Industrial panelboard
  • Breaker Type: Molded case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Up to 250 MCM
  • Metal Type: Copper alloy contacts
  • Panel Style: NEMA 1
  • 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: Bolt-on
  • Hz: 50/60 Hz
  • Coil Material: Not applicable
  • Horse Power: 150 HP at 480V
  • Aux Contacts: Optional
  • 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 style
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Copper or aluminum
  • Amperage Maximum: 250A
  • Amperage Minimum: 0A
  • Nema Rating: NEMA AB1
  • Switch Style: Toggle
  • Wire Size: 14 AWG to 250 MCM
  • Certification: UL listed
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Pressure lugs
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Three-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: JJ3 series
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: JJ3
  • 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