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LA, LH, Q4 Molded Case Circuit Breakers

Basic thermal magnetic protection from 125 to 400A as part of the Square D portfolio of molded case circuit breakers.

Basic thermal magnetic protection.

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LA, LH, Q4 Molded Case Circuit Breakers
  • Features

    LA, LH and Q4 molded case circuit breakers provide basic thermal magnetic protection. Their primary functions are to provide a means to manually open a circuit and automatically open a circuit under overload or short circuit conditions.
    Consider using PowerPact™ range of molded case circuit breakers for situations requiring circuit breaker accessories, communication, lugs and auxiliaries.  

    LA and LH Features

    • Available in 2-3 pole design
    • Fixed thermal magnetic trip units from 125-400A at up to 600 Vac and 250 Vdc
    • Interrupting ratings 30 kA at 480 Vdc and 10 kA at 250 Vdc. LH is available with 35 kA at 480 Vac and 50 kA at 250 Vdc
    • Automatic molded case switches are available in LH (2 and 3 pole)
    • Available in Unit-mount, I-line and rear-connect constructions
    • UL 489, CSA, IEC certified


    • Available in 2-3 pole design
    • Thermal magnetic trip units from 250-400A at up to 240 Vac
    • Interrupting ratings 25 kA at 240 Vac
    • Automatic molded case switches available with a 400 A, 240Vac rating (2 and 3 pole)
    • mount and I-line constructions
    • UL 489, CSA, IEC certified


    Economical thermal magnetic protection


    Commercial Buildings
    Control Equipment Panels
    Industrial Buildings
    OEM Commercial

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