Westinghouse MA3800WK Molded Case Circuit Breaker

Description:

The Westinghouse MA3800WK Circuit Breaker is a high-capacity non-automatic molded case switch designed for manual power switching and circuit isolation in industrial and commercial electrical distribution systems. Commonly installed in switchgear assemblies, motor control centers, industrial machinery, and large electrical distribution panels where dependable three-phase switching and heavy-duty power isolation are required. Maintenance teams, electricians, and facility operators use this breaker for equipment disconnect applications, power isolation, and replacement of aging switching hardware.

Applications:

The Westinghouse MA3800WK molded case switch is commonly used in manufacturing facilities, industrial automation systems, HVAC infrastructure, mining equipment, and large power distribution systems where reliable 800 amp three-phase switching and dependable circuit isolation are critical for safe and continuous electrical operation.

Technical Specifications:

• Brand: Westinghouse
• Part Number: MA3800WK
• Product Type: Molded Case Switch / Circuit Breaker
• Breaker Series: MA
• Number of Poles: 3 Pole
• Current Rating: 800 Amp
• Voltage Rating: 600 Volt AC
• Phase Type: 3 Phase
• Interrupt Rating: 30kA @ 480V
• Protection Type: Non-Automatic
• Function Code: NA – No Overcurrent Protection
• Trip Unit: High Magnetic Non-Interchangeable
• Mounting Type: Bolt-On
• Connection Type: Bolt-On
• Application: Commercial and industrial electrical distribution systems
• Function: Manual power switching and circuit isolation
• Compatible Equipment: Switchgear and distribution systems
• Installation Type: Panel mounted
• Usage Environment: Commercial and industrial electrical systems
• Designed For: High-capacity power distribution and disconnect applications
• Construction: Molded case switch assembly

Common Replacements:

• Eaton MA3800WK
• Cutler-Hammer MA3800WK
• Square D MA36800NS