Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V
Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V
Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V
Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V
Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V
Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V

Siemens B345 - Molded Case Circuit Breaker 45A 3P 240V

Siemens
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Siemens B345 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 AC voltage rating within its 125A frame, utilizing a thermal-magnetic trip unit for combined long-time and instantaneous protection. The compact, bolt-on unit measures 2.563" x 3.00" x 3.122" and weighs 0.948 lb, constructed with lug terminals compatible with wire sizes from 8 AWG to 2 AWG (Al) or 4 AWG (Cu). It complies with key industry standards including UL listing, CSA certification, HACR rating, and NOM certification, ensuring suitability for demanding environments with an operating temperature range of -25°C to 70°C. This breaker is typically applied in Siemens P1 panelboards for commercial and light industrial power distribution, offering a 10kA interrupting capacity at 240V AC.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal-Magnetic Protection, Bolt-on Connection
  • Voltage Rating: 240V AC
  • Current Rating: 45A
  • Dimensions: 2.563" H x 3.00" W x 3.122" D (65.1mm x 76.2mm x 79.3mm)
  • Standards: UL Listed, CSA Certified, HACR Rated, NOM Certified
  • Applications: Three-Phase Power Distribution in Siemens P1 Panelboards
  • Phase: 3
  • AIC Rating: 10kA @ 240V AC
  • Poles: 3
  • Protection: Thermal-Magnetic
  • Functions: Long Time and Instantaneous Trip
  • Frame Size: 125A/BL
  • Breaker Type: Standard
  • Temp Rating: -25°C to 70°C (-13°F to 158°F)
  • Connection: Bolt-on
  • Terminal Connection: Lug
  • MCM Size: Min. 8 AWG, Max. 2 AWG (Aluminum) or 4 AWG (Copper)
  • Panel Type: Siemens P1 Panelboards
  • Certification: CSA Certified, HACR Rated, NOM Certified, UL Listed
  • Weight: 0.948 lb (0.43 kg)


Product Identification
  • UPC: 783643263741
  • GTIN: 00783643263741