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K3B150

Siemens
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Siemens K3B150 Circuit Breaker - Molded Case 150A 3-Pole (600V Thermal Magnetic) The Siemens K3B150 is a 3-pole molded case circuit breaker from the K Frame family, designed to provide long-time and instantaneous (LI) circuit protection through its thermal magnetic trip mechanism. Rated for 600V AC and 150 amps, this three-phase breaker delivers reliable overload and short-circuit interruption in industrial power distribution systems. The unit features a bolt-on connection type, weighs 15 lb, and is constructed as a compact K3B series device suitable for panelboard mounting. It complies with UL standards for molded case circuit breakers, ensuring safe operation in commercial and light industrial environments. Typical applications include branch circuit protection, motor control centers, and main disconnect panels in manufacturing facilities and commercial buildings.

Key Features & Specifications
  • Manufacturer: Siemens
  • Item Subcategory: Molded Case
  • Family: K Frame
  • Type: K3B
  • Weight: 15 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Phase: 3
  • Current Rating: 150A
  • Amperage: 150 Amps
  • Voltage Rating: 600 VAC
  • Poles: 3 Pole
  • Mounting Type: Bolt-On
  • Trip Unit: Thermal Magnetic
  • Interrupt Rating: Typically 18kA at 600V
  • Series/Frame: Siemens K3B Series
  • Certifications: UL Listed


Siemens K3B150 - Molded Case 150A 3-Pole