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Siemens BQ3B045L - Molded Case Circuit Breaker 45A 240V

Siemens
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The Siemens BQ3B045L is a 3-pole molded case circuit breaker from the BQ Series, designed for thermal magnetic protection against overloads and short circuits. It is rated for 45A at 240V AC with a 10kA interrupting capacity, providing reliable overcurrent protection in a compact 2.756 x 2.756 x 3.937 inch frame weighing 1.213 lb. This unit features a lug terminal connection for feed-thru wiring and offers LI (Long-Time and Instantaneous) trip functions, making it suitable for Siemens panelboards. It is UL Listed, CSA certified, and HACR rated, ensuring compliance with North American standards for industrial and commercial power distribution. Typical applications include branch circuit protection in lighting, heating, and motor control panels within three-phase systems.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, BQ Series
  • Voltage Rating: 240V AC
  • Current Rating: 45A
  • Dimensions: 2.756 x 2.756 x 3.937 inch
  • Standards: UL Listed, CSA Certified, HACR Rated
  • Applications: Industrial and commercial panelboard protection
  • Switch Type: Thermal Magnetic
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable (thermal magnetic)
  • Temp Rating: Standard ambient
  • Shipping Dimensions: 2.756 x 2.756 x 3.937 inch
  • Phase: 3
  • Voltage: 240V
  • Amperage: 45A
  • AIC rating: 10kA@240V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: BQ
  • Trip Type: Thermal Magnetic
  • Panel Type: Siemens Panelboards
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Standard
  • Inductance: Not applicable
  • Impedance: Not applicable
  • Barrels: Not applicable
  • Class Rating: Not applicable
  • Diameter: Not applicable
  • Velocity: Not applicable
  • Clip Center: Not applicable
  • Clas: Not applicable
  • Mounting: Panelboard
  • Hz: 50/60
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not included
  • CPT: Not included
  • 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: Open
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: Not specified
  • Amperage Maximum: 45A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not applicable
  • Wire Size: Not specified
  • Certification: CSA, HACR, UL
  • Circuit Breaker Mounting Style: Plug-in or Bolt-on (panelboard)
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: HACR Rated, UL Listed
  • Compatible Frames: BQ Series
  • Installation Type: Panelboard
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: BQ
  • 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: Standard (40°C ambient)
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 783643237278
  • GTIN: 00783643237278