Square D

Square D MHL36300 300A 3 Poles Thermal Magnetic Molded Case Circuit Breaker – Bolt On – 600V

In stock
SKU: MHL36300-NS
$1,899.00
Condition
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1 year warranty
30 day returns

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The Square D MHL36300 molded case circuit breaker is designed to provide dependable overload and short-circuit protection for commercial and industrial electrical distribution systems. Featuring an MHL frame style and a thermal magnetic non-interchangeable trip unit, this breaker ensures stable and efficient circuit protection under demanding operating conditions. Its rugged molded case construction, high interrupting capacity, and bolt-on mounting design make it suitable for heavy-duty electrical applications requiring long-term durability, operational safety, and reliable power distribution performance.

Product Specifications

  • Brand: Square D
  • Model: MHL36300
  • Frame Style: MHL
  • Product Type: Molded Case Circuit Breaker
  • Breaker Type: Thermal Magnetic
  • Trip Unit: Non-Interchangeable
  • Amperage Rating: 300 Ampere
  • Number of Poles: 3 Pole
  • Mounting Type: Bolt On
  • Maximum Voltage Rating: 600V
  • Standard Lug Type: Line and Load End
  • Operating Temperature Reference: 40°C
  • Warranty: One Year

Technical Specifications

  • Thermal magnetic trip mechanism for overload and short-circuit protection
  • Non-interchangeable trip unit for fixed protection settings
  • Heavy-duty molded case design for industrial-grade reliability
  • High interrupting capacity for enhanced electrical system safety
  • Bolt-on mounting configuration for secure installation
  • Designed for commercial and industrial distribution systems
  • Reliable switching and interruption performance under varying load conditions
  • Durable internal construction for extended service life

Voltage and Ratings

  • Rated Current: 300A
  • Rated Maximum Voltage: 600V
  • Interrupting Capacity: 65kA @ 240 VAC
  • Interrupting Capacity: 65kA @ 480 VAC
  • Interrupting Capacity: 25kA @ 600 VAC
  • Interrupting Capacity: 14kA @ 250 VDC
  • Trip Setting Range: 1500–3000
  • Frequency Rating: 50/60Hz

Product Data

  • Manufacturer: Square D
  • Product Category: Molded Case Circuit Breaker
  • Series: MHL Frame
  • Connection Type: Bolt On
  • Frame Type: M
  • Pole Configuration: 3 Pole
  • Lug Configuration: Line and Load End Terminals Standard
  • Condition Support: Certified Reconditioned and New Surplus
  • Included Warranty Coverage: Shipping, repairs, parts, and labor for recertification
  • Application: Commercial and Industrial Electrical Distribution Systems

Important Note

The product image shown represents a base model and is intended for identification purposes only. Accessories purchased together with the breaker can be professionally installed according to customer configuration requirements at no additional cost when installation details are provided during checkout. Installation, operation, and maintenance should only be performed by qualified electrical personnel following applicable electrical codes and manufacturer recommendations. Warranty coverage excludes damage caused by misuse, improper installation, or normal operational wear and tear.
  • Type Circuit Breakers
  • Vendor Square D
  • Brand Square D

Returns are easy

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

FREE Shipping on orders over $149.

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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In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

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.