Square D

Square D LAL3640022M Motor Circuit Protector – 3 Pole – 400A – Unit Mount – Magnetic Only – Instantaneous Trip

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SKU: LAL3640022M GTIN/UPC: 785901848370
$3,427.37
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The Square D LAL3640022M motor circuit protector is a high-performance, magnetic-only protection device designed for industrial motor control applications. Built for use in motor control centers and motor starters, it provides fast-acting short-circuit protection without thermal overload functions, making it ideal for specialized motor protection schemes. Rated for up to 600VAC and 250VDC, this unit-mount breaker is commonly used in heavy-duty industrial environments and can serve as a replacement for legacy L-frame systems, with many modern installations transitioning toward Schneider Electric PowerPact LGL36400U31X platforms.

Voltage and Current Ratings

  • Current Rating: 400 Amps
  • Voltage Rating: 240 / 480 / 600 VAC, 250 VDC
  • Phase: 3 Phase
  • Continuous Current Rating: 100%

Interrupting Rating

  • 42kA at 240VAC
  • 30kA at 480VAC
  • 22kA at 600VAC
  • 10kA at 250VDC

Trip Unit and Protection

  • Protection Type:
    • Short-Circuit Protection Only
  • Trip Technology: Magnetic Only
  • Trip Function Code: I (Instantaneous Only)
  • Trip Adjustability: Adjustable Magnetic Settings
  • No thermal overload protection (Motor Circuit Protector design)

Configuration and Mounting

  • Poles: 3 Pole
  • Series: LAL
  • Frame Type: Motor Circuit Protector (L-Frame equivalent)
  • Mounting Mode: Unit Mount
  • Application: Motor Control Centers, Motor Starters
  • Control Type: Toggle

Physical Specifications

  • Terminal Type: Lugs
  • Wire Range: 1 AWG to 600 kcmil (Aluminum/Copper)
  • Optional Accessories:
    • Shunt Trip
    • Auxiliary Switch
    • Undervoltage Release
    • Alarm Switch

Electrical Connections

  • Line Connection: Lugs
  • Load Connection: Lugs

Standards and Certifications

  • UL 489 Listed
  • IEC 60947-2 Compliant
  • CSA Certified

Features

  • Motor circuit protector designed for industrial motor applications
  • Magnetic-only instantaneous trip for fast short-circuit response
  • Adjustable magnetic trip range (500–1000A)
  • High interrupting capacity across multiple voltage levels
  • Compatible with motor control centers and starter assemblies
  • Unit-mount construction for direct integration
  • Supports optional protective and signaling accessories
  • Designed for heavy-duty industrial environments
  • Commonly used in systems transitioning to modern PowerPact platforms
  • Manufactured by Schneider Electric for reliable motor protection performance
  • Type Motor Protector
  • Vendor Square D
  • Brand Square D

Returns are easy

You may return items within 30 days of delivery for a refund.

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My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.