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Square D FB100 - Miniature Circuit Breaker 100A 3-Pole

Square D
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Square D FB100 is a miniature circuit breaker designed for branch circuit protection in industrial control panels. It operates at 480Y/277V AC with a 100-amp current rating and a 14kAIC interrupting capacity. The unit features a 3-pole configuration with a thermal-magnetic trip mechanism, housed in a compact 1-inch per pole frame with a 0.66 lb weight. It complies with UL 489 and CSA C22.2 standards for safety and performance. This breaker is typically used in motor control centers, lighting panels, and distribution equipment requiring reliable overcurrent protection.

Key Features & Specifications
  • Type: Miniature circuit breaker, thermal-magnetic trip, plug-in mounting
  • Voltage Rating: 480Y/277V AC
  • Current Rating: 100A
  • Dimensions: 1-inch per pole width, 3-pole
  • Standards: UL 489, CSA C22.2
  • Applications: Branch circuit protection in industrial control panels, motor control centers, lighting panels
  • Switch Type: Toggle
  • Configuration: 3-pole
  • Coil Voltage Maximum: Not applicable (thermal-magnetic)
  • Temp Rating: 40°C ambient
  • Shipping Dimensions: 3.0 x 2.0 x 1.5 inches
  • Phase: 3-phase
  • Voltage: 480Y/277V AC
  • Amperage: 100A
  • AIC rating: 14kAIC at 480V
  • Connection: Line and load lugs
  • Poles: 3
  • Protection: Overcurrent and short-circuit
  • Functions: Branch circuit protection
  • Frame Size: 1-inch per pole
  • Trip Type: Thermal-magnetic
  • Panel Type: Load center or panelboard
  • Breaker Type: Miniature circuit breaker
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not applicable
  • Metal Type: Steel and copper
  • Panel Style: Flush or surface mount
  • Bus Type: Plug-on
  • Fuse Class: Not applicable
  • Insulation Temperature: 75°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: Plug-in
  • Hz: 60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • Full Load Amps: 100A
  • Dist Voltage: 480Y/277V AC
  • Bucket Size: Not applicable
  • Bucket Style: Not applicable
  • Bucket Type: Not applicable
  • Full Load Amp Maximum: 100A
  • Full Load Amp Minimum: 100A
  • Enclosure: Open type
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 100A
  • Amperage Minimum: 100A
  • Nema Rating: Not specified
  • Switch Style: Toggle
  • Wire Size: #14 to #2 AWG
  • Certification: UL, CSA
  • Circuit Breaker Mounting Style: Plug-in
  • Terminal Connection: Screw lugs
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-phase
  • Standards: UL 489, CSA C22.2
  • Compatible Frames: Square D QO or NQ
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: 1-inch per pole
  • Current Rating: 100A
  • 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: 83524304882
  • GTIN: 00835243048829