The Square D MA36300 300A 3 Pole Thermal Magnetic MCCB – Plug In – 600V is a reliable molded case circuit breaker designed for superior circuit protection in commercial and industrial electrical systems. Featuring an MA frame style with a thermal magnetic non-interchangeable trip unit, this breaker provides dependable overload and short-circuit protection for demanding power distribution applications. With durable construction and high interrupting capability, the MA36300 is suitable for both AC and DC electrical systems requiring safe and efficient protection performance.

Product Specifications

• Brand: Square D
• Model: MA36300
• Rated Current: 300 Ampere
• Number of Poles: 3 Pole
• Breaker Type: Thermal Magnetic Molded Case Circuit Breaker (MCCB)
• Mount Type: Plug In
• Frame Type: MA Frame
• Maximum Voltage: 600 VAC
• Trip Unit Type: Non-Interchangeable
• Standard Lug Type: Load End
• Application: Commercial and Industrial Power Distribution

Technical Specifications

• Interrupting Capacity:
  • 42 kA @ 240 VAC
  • 30 kA @ 480 VAC
  • 22 kA @ 600 VAC
  • 14 kA @ 250 VDC
• Trip Setting Range: 1500 – 3000
• Operating Temperature Reference: 40°C
• Protection Type: Overload and Short Circuit Protection
• Terminal Configuration: Load End Terminals Standard
• Connection Type: Plug In
• Thermal Magnetic Protection Mechanism
• Industrial Grade Heavy-Duty Design

Voltage and Ratings

• Rated Operational Voltage: Up to 600 VAC
• DC Voltage Rating: 250 VDC
• Current Rating: 300A
• Pole Configuration: 3 Pole
• Interrupting Rating at 240 VAC: 42 kA
• Interrupting Rating at 480 VAC: 30 kA
• Interrupting Rating at 600 VAC: 22 kA
• Interrupting Rating at 250 VDC: 14 kA
• Frequency: 50/60 Hz
• Temperature Calibration: 40°C

Product Data

• Manufacturer: Square D
• Product Condition: New / Certified Reconditioned (Based on Availability)
• Warranty: 1 Year In-House Warranty
• Connection Style: Plug In
• Frame Style: MA Frame
• Suitable For: Industrial Panels, Switchboards, and Power Distribution Systems
• Accessory Installation: Available at No Additional Cost with Breaker Purchase
• Packaging: Standard Industrial Packaging
• Country of Origin: USA

Important Note

Product images are intended for identification purposes only and may represent a standard or base configuration. Accessories ordered together with the breaker can be installed according to your specified requirements at no additional cost. Installation, operation, and maintenance should only be performed by qualified electrical professionals following applicable electrical standards and safety regulations. Warranty coverage includes repairs, replacement parts, labor, and standard shipping necessary for recertification, excluding damage caused by misuse, improper handling, incorrect installation, or normal operational wear.