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Westinghouse HMA3225T - Thermal Magnetic Trip Unit 225A 600V 3-Pole

Westinghouse
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Westinghouse HMA3225T is a thermal-magnetic trip unit designed for the MARK 75 family of circuit breakers, providing long-time and instantaneous (LI) protection against overloads and short circuits. This 3-pole unit is rated for 600V AC and offers an adjustable amperage range from 225A minimum to 225A maximum, ensuring precise coordination for industrial power distribution systems. The unit weighs 4 lb and is compatible with both MA and HMA breaker frames, featuring a compact construction for straightforward installation. It complies with industry standards for overcurrent protection in commercial and industrial environments. Typical applications include motor control centers, switchboards, and panelboards requiring reliable thermal-magnetic trip functionality.

Key Features & Specifications
  • Type: Thermal Magnetic Trip Unit
  • Voltage Rating: 600V AC
  • Current Rating: 225A (Minimum 225A, Maximum 225A)
  • Poles: 3
  • Functions: LI - Long-Time and Instantaneous
  • Compatible Frames: MA, HMA
  • Weight: 4 lb
  • Family: MARK 75
  • Item Subcategory: Trip Units & Programmers


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