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Westinghouse HMA3300 - 300A 3-Pole Molded Case Circuit Breaker

Westinghouse
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Westinghouse HMA3300 is a 300A, 3-pole molded case circuit breaker from the MARK 75 family, designed for overcurrent protection in industrial electrical systems. It operates at 600V AC with a thermal magnetic trip unit providing LI (Long-Time and Instantaneous) functions, and features a bolt-on connection for secure panel mounting. The breaker has a compact 1 in x 1 in x 1 in footprint, weighs 1 lb, and is constructed for reliable performance. It is UL Listed and carries an AIC rating of 35kA at 480V, ensuring robust fault interruption capability. This unit is suitable for three-phase applications requiring precise, dependable circuit protection in manufacturing and distribution environments.

Key Features & Specifications
  • Manufacturer: Westinghouse
  • Item Subcategory: Molded Case
  • Family: MARK 75
  • Country of Origin: United States
  • Type: HMA
  • Dimensions: 1 in x 1 in x 1 in (Length/Depth x Height x Width)
  • Weight: 1 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • Certification: UL Listed
  • AIC rating: 35kA@480V
  • Phase: 3
  • Current Rating: 300A
  • Amperage: 300A
  • Voltage: 600V AC
  • Frame Type: MA
  • Mounting Type: Bolt-On
  • Interrupt Rating: 30kA at 480V AC
  • Trip Unit: Thermal Magnetic with Long Time, Short Time, and Instantaneous functions
  • Interchangeable Trip Unit
  • Load Side Lug Terminals
  • Series: Mark 75 Family


Product Identification
  • UPC: 786679190319
  • GTIN: 00786679190319