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Siemens BQ3B04500S01 - Molded Case Circuit Breaker 45A 3P 240V

Siemens
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Siemens BQ3B04500S01 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in three-phase electrical systems. It features a 45A current rating and a 240V voltage rating, housed within a compact 125A frame with dimensions of 5.906 x 3.937 x 2.756 inches and a weight of 1.499 lb. This thermal magnetic breaker is constructed with bolt-on lug connections, supports wire sizes from 8 AWG to 4 AWG (Al) or 6 AWG (Cu), and operates within a temperature range of -25°C to 70°C. It complies with UL, CSA, and HACR standards, offering a 10kA interrupting capacity at 240V, and is typically applied in Siemens panelboards for industrial and commercial power distribution.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, BQ Series, Thermal Magnetic Protection with Long-Time and Instantaneous (LI) Functions
  • Voltage Rating: 240V AC
  • Current Rating: 45A
  • Dimensions: 5.906" x 3.937" x 2.756" (150mm x 100mm x 70mm)
  • Standards: UL Listed, CSA Certified, HACR Rated
  • Applications: Three-phase power distribution in industrial and commercial Siemens panelboards
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Coil Voltage Maximum: 120V (for integrated shunt trip)
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Shipping Dimensions: Not Specified
  • Phase: 3
  • Voltage: 240V
  • Amperage: 45A
  • AIC rating: 10kA @ 240V
  • Connection: Bolt-on
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI (Long-Time and Instantaneous)
  • Frame Size: 125A/BQ
  • Trip Type: Thermal Magnetic
  • Panel Type: Siemens Panelboards
  • Breaker Type: Shunt Trip (with non-interchangeable 120V shunt trip)
  • Control Voltage Minimum: Not Specified
  • Control Voltage Maximum: Not Specified
  • MCM Size: Min. 8 AWG, Max. 4 AWG (Aluminum) or 6 AWG (Copper)
  • Metal Type: Not Specified
  • Panel Style: Not Specified
  • Bus Type: Not Specified
  • Fuse Class: Not Applicable
  • Insulation Temperature: Not Specified
  • Inductance: Not Specified
  • Impedance: Not Specified
  • Barrels: Not Applicable
  • Class Rating: Not Specified
  • Diameter: Not Applicable
  • Velocity: Not Applicable
  • Clip Center: Not Applicable
  • Class: Not Specified
  • Mounting: Panel Mount
  • Hz: 50/60 Hz
  • Coil Material: Not Specified
  • Horse Power: Not Specified
  • Aux Contacts: Not Specified
  • CPT: Not Specified
  • Full Load Amps: Not Specified
  • Dist Voltage: Not Specified
  • Bucket Size: Not Applicable
  • Bucket Style: Not Applicable
  • Bucket Type: Not Applicable
  • Full Load Amp Maximum: Not Specified
  • Full Load Amp Minimum: Not Specified
  • Enclosure: Molded Case
  • Relay Style: Not Applicable
  • Coil Voltage Minimum: Not Specified
  • Wire: Copper or Aluminum per MCM size
  • Amperage Maximum: 45A
  • Amperage Minimum: Not Specified
  • Nema Rating: Not Specified
  • Switch Style: Not Specified
  • Wire Size: 8 AWG to 4 AWG (Al), 6 AWG (Cu)
  • Certification: CSA, HACR, UL
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: Three-Phase
  • Standards: HACR Rated, UL Listed
  • Compatible Frames: 125A/BQ
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not Applicable
  • Breaker Frame: 125A
  • Current Rating: 45A
  • 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: 70°C
  • Max Clamp Voltage: Not Applicable
  • On-State Current: Not Applicable


Product Identification
  • UPC: 783643237858
  • GTIN: 00783643237858