Square D

Square D MHL36400 400A 3 Poles Thermal Magnetic Molded Case Circuit Breaker – Bolt On – 600V

In stock
SKU: MHL36400-NS
$6,799.00
Condition
Secure transaction
FREE & fast shipping on orders over $149
1 year warranty
30 day returns

Ask an expert

Email 866-972-6370

The Square D MHL36400 molded case circuit breaker is a medium-capacity industrial-grade protection device designed for reliable performance in commercial and industrial electrical distribution systems. Featuring an MHL frame style and a thermal magnetic non-interchangeable trip unit, this breaker delivers consistent overload and short-circuit protection under demanding operating conditions. Its rugged molded case construction, high interrupting capacity, and bolt-on mounting configuration ensure secure installation, long-term durability, and dependable operation in critical power distribution applications.

Product Specifications

  • Brand: Square D
  • Model: MHL36400
  • Frame Style: MHL
  • Product Type: Molded Case Circuit Breaker
  • Breaker Type: Thermal Magnetic
  • Trip Unit: Non-Interchangeable
  • Amperage Rating: 400 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 construction for industrial reliability
  • High interrupting capacity for enhanced system safety
  • Bolt-on mounting design for secure and stable installation
  • Designed for commercial and industrial power distribution systems
  • Reliable interruption performance under varying load conditions
  • Durable internal components for extended operational life

Voltage and Ratings

  • Rated Current: 400A
  • 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: 2000–4000
  • 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 installed at no additional cost according to customer configuration requirements when installation instructions are provided during checkout. Installation, operation, and servicing should only be performed by qualified electrical personnel in accordance with applicable electrical standards and manufacturer guidelines. Warranty coverage excludes damage caused by misuse, improper installation, or normal 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).

Same Day Shipping

We strive to ship out your items within one business day.

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.