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Siemens FJ2-B125 - Molded Case 125A 240V AC Breaker

Siemens
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The Siemens FJ2-B125 is a molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It operates at a voltage rating of 240V AC with a current rating of 125 Amps, providing reliable interruption of fault currents. This compact unit weighs 7.8 lb and features a robust thermoplastic construction for durability in demanding environments. It complies with UL 489 standards for safety and performance, making it suitable for use in panelboards, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Voltage Rating: 240V AC
  • Current Rating: 125 Amps
  • Weight: 7.8 lb
  • Standards: UL 489
  • Applications: Industrial power distribution, panelboards, switchboards, motor control centers
  • Breaker Type: Molded Case
  • Frame Size: FJ2
  • Poles: 2
  • Connection: Line and load terminals
  • Installation Type: Fixed
  • Circuit Breaker Mounting Style: Bolt-on
  • Terminal Connection: Pressure plate
  • Frequency Rating: 50/60 Hz
  • Phase: Single-phase
  • Amperage: 125
  • AIC Rating: 10kA at 240V AC
  • Trip Type: Thermal-magnetic
  • Protection: Overcurrent and short-circuit
  • Functions: Overload and short-circuit protection
  • Panel Type: Suitable for Siemens panelboards
  • Bus Type: Tin-plated aluminum or copper
  • Insulation Temperature: 75°C
  • Operating Temperature Maximum Celsius: 40°C
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Copper alloy contacts
  • Panel Style: Flush or surface mount
  • Fuse Class: Not applicable
  • 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
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 125
  • Dist Voltage: 240V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 125
  • Full Load Amp Minimum: 125
  • Enclosure: Open type
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 125
  • Amperage Minimum: 125
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: 14 AWG to 2 AWG
  • Certification: UL 489
  • Phase Connection: Single-phase
  • Compatible Frames: FJ2 series
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: FJ2
  • 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
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: Not available
  • GTIN: Not available