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Westinghouse HLA3300T - Thermal Magnetic Trip Unit 300A 600V 3P

Westinghouse
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Westinghouse HLA3300T is a thermal magnetic circuit breaker trip unit designed for providing reliable overcurrent protection in industrial power distribution systems. It features a 600V AC voltage rating and a fixed 300A current rating for three-phase circuits, utilizing a long-time and instantaneous (LI) trip function to guard against both sustained overloads and short-circuit faults. The unit is constructed within a compact, durable housing measuring 8.6 x 5.4 x 5.4 inches and weighing 2.5 lb, and it is UL Listed for safety compliance. This HLA-type unit from the MARK 75 family is engineered for integration into compatible LA and HLA breaker frames, making it suitable for panelboards and switchgear in commercial and industrial facilities.

Key Features & Specifications
  • Type: HLA Thermal Magnetic Trip Unit, Long-Time and Instantaneous (LI) Function
  • Voltage Rating: 600V AC
  • Current Rating: 300A
  • Dimensions: 8.6 in (L) x 5.4 in (H) x 5.4 in (W)
  • Standards: UL Listed
  • Applications: Industrial Power Distribution, Panelboards, Switchgear
  • Poles: 3
  • Protection: Thermal Magnetic
  • Compatible Frames: LA, HLA
  • Family: MARK 75
  • Weight: 2.5 lb


Product Identification
  • UPC: 786679186848
  • GTIN: 00786679186848