999330 - 30 Amp Circuit Breaker

999330 - 30 Amp Circuit Breaker

When you’re working on an existing electrical system, the priority is simple—find the right part, make it fit, and keep things running the way they should. The 999330 molded case circuit breaker is built for exactly that purpose. With a 30 amp rating, 3-pole configuration, and 600VAC capacity, it’s a practical solution for maintaining or replacing breakers in systems designed around ML-1 (F-frame) components. This breaker uses a thermal-magnetic trip mechanism, which means it reacts appropriately to both sustained overloads and sudden faults. That’s the kind of straightforward protection most facilities rely on every day. The molded case design keeps everything intact, while the size and layout make it easier to install in panels where space and alignment matter. It’s not about bells and whistles—it’s about getting a dependable match that works the way your system expects it to.

Key Features and Benefits

• 30 amp capacity for controlled electrical loads
• 3-pole design for three-phase systems
• Thermal-magnetic trip for overload and short-circuit protection
• ML-1 (F-frame) compatibility for proper fit in existing equipment
• Molded case housing helps protect internal components
• Sized for straightforward installation in panelboards and switchgear
• Built to last with solid, time-tested construction

Technical Specifications

• Part Number: 999330
  
• Amperage: 30A
  
• Poles: 3
  
• Voltage Rating: 600VAC
  
• A.I.C. Rating: 600VAC class
  
• Frame Type: ML-1 (F-Frame)
  
• Trip Type: Thermal-Magnetic
  
• Breaker Type: Molded Case Circuit Breaker
  
• Dimensions:
  • 4.50" W x 6.50" H x 3.00" D
• Weight:
  • 7 lbs

Material Compliance and Certifications

• Industry Standards: This breaker is produced in line with standard industry practices for molded case circuit breakers. It’s intended for use in systems that require components meeting established electrical safety expectations. If your project calls for specific certifications or documentation, it’s best to verify those details based on your application.
• UL Standards: When installed according to electrical codes, you can have confidence that this unit adheres to expected construction and compliance benchmarks.
  

Where It Works Best

• You’ll typically see this breaker used in:
• Existing commercial or industrial electrical systems
• Equipment built around ML-1 / F-frame breakers
• Panelboards and distribution setups needing a 30A, 3-pole unit
• Maintenance jobs where matching the original breaker matters
• Retrofit work where space, fit, and rating all need to line up