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Westinghouse HLA21250TM - Trip Unit 400A 2-Pole 600V

Westinghouse
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Westinghouse HLA21250TM is a 2-pole magnetic-only trip unit designed for instantaneous overcurrent protection in low-voltage distribution systems. It is rated for 600VAC operation with a continuous current rating of 400A, providing precise short-circuit protection without thermal delay. This compact unit weighs 2 lb and is engineered for plug-on mounting within compatible LA and HLA frame molded case circuit breakers. It is built to meet industry standards for molded case circuit breaker trip units, ensuring reliable performance in demanding environments. Typical applications include industrial motor control centers, switchboards, and panelboards requiring selective coordination and high fault-current protection.

Key Features & Specifications
  • Type: Trip Unit
  • Family: MARK 75
  • Functions: I - Instantaneous
  • Voltage Rating: 600V
  • Poles: 2
  • Amperage: 400A
  • Protection: Magnetic Only
  • Compatible Frames: LA, HLA
  • Weight: 2 lb
  • Interrupting Rating: 10kA
  • Mounting Type: Plug-On
  • Wire Size: 2 AWG to 300 KCMIL (Aluminum/Copper)


Part Number: HLA21250TM