997318 - 150 Amp Circuit Breaker

997318 - 150 Amp Circuit Breaker

If you're replacing a breaker in an existing setup, you usually care about two things: will it fit, and will it do the job without surprises. The 997318 molded case circuit breaker is built with that in mind. This unit is rated at 150 amps and comes in a 3-pole configuration, so it's suited for standard three-phase systems. It uses a thermal-magnetic trip, which means it reacts to both sustained overloads and sudden faults without any complicated components. The ML-3 (J-Frame) design is what really matters here—it lines up with equipment that already calls for that frame, so you're not stuck modifying panels or forcing something that doesn't quite match. At 600VAC, it's intended for higher-voltage applications commonly found in commercial and industrial environments. Nothing fancy—just the correct ratings and a design that holds up over time.

Key Features and Benefits

• 150 amp rating for typical distribution loads
• 3 poles for use in three-phase systems
• Thermal-magnetic trip handles both overloads and short circuits
• 600VAC rating for commercial and industrial setups
• ML-3 (J-Frame) format for proper fit in compatible equipment
• Sized to fit without crowding the panel
• Built to last with dependable internal components

Technical Specifications

• Part Number: 997318
  
• Amperage: 150A
  
• Poles: 3
  
• Voltage Rating: 600VAC
  
• Frame Type: ML-3 (J-Frame)
  
• Trip Type: Thermal-Magnetic
  
• Dimensions:
  • 6.00" W x 10.38" H x 3.88" D
• Weight: 14 lbs
  

Material Compliance and Certifications

• Industry Standards: This breaker is intended for use in systems designed to meet standard electrical codes and practices. As with any electrical component, installation should follow local regulations and be verified for compatibility with the existing equipment.
• 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

• Panels already set up for ML-3 frame breakers
• Commercial buildings with established three-phase systems
• Industrial environments handling 150 amp circuits
• Maintenance work where matching the original breaker matters
• Retrofit situations where space and alignment can't change