PB31800 - 1800Amp Circuit Breaker

PB31800 - 1800Amp Circuit Breaker

If you're trying to match a PB31800 circuit breaker already used in an existing electrical system, the details matter. This Type PB breaker is rated at 1800 amps and has a 3-pole configuration, with an AB DE-ION design for compatible 60-cycle equipment. Its interrupting ratings are 100k AIC at 600VAC, 100k AIC at 480VAC, and 125k AIC at 240VAC. Magnetic low/high trip settings range from 3000A to 8000A. The breaker measures approximately 22 inches high, 12 inches wide, and 9 inches deep. Those dimensions are worth checking carefully, especially when you're working with older electrical equipment where the existing space and breaker configuration need to match. The PB31800 makes sense for applications that specifically call for its combination of amperage, pole count, Type PB construction, trip range, and interrupting ratings. It's built to last in its intended application, making it a straightforward option for maintaining compatible legacy equipment without changing the original form, fit, or function.

Key Features and Benefits

• 1800A rating for electrical equipment designed around this amperage requirement.
• Three poles to match compatible 3-pole applications.
• Type PB design for systems that require this specific breaker configuration.
• Interrupting ratings of 100k AIC at 600VAC, 100k AIC at 480VAC, and 125k AIC at 240VAC.
• 3000A–8000A magnetic low/high trip settings.
• Designed for 60-cycle (60 Hz) applications.
• AB DE-ION circuit breaker construction.
• Measures approximately 22" H x 12" W x 9" D, making it easier to compare the physical footprint with an existing breaker.
• A practical choice when the goal is to maintain the form, fit, and function of compatible legacy electrical equipment.
• Built to last when properly matched to the intended application and maintained as required.

Technical Specifications

• Part Number: PB31800
  
• Type: PB
  
• Amperage: 1800A
  
• Poles: 3
  
• AIC @ 600VAC: 100k
  
• AIC @ 480VAC: 100k
  
• AIC @ 240VAC: 125k
  
• Frequency: 60 cycles / 60 Hz
  
• Breaker Design: AB DE-ION
  
• Magnetic Low/High Trip Settings: 3000A–8000A
  
• Dimensions:
  • Height: 22.0 in.
  • Width: 12.0 in.
  • Depth: 9.0 in.

Material Compliance and Certifications

• The available specifications for the PB31800 include no specific material compliance, agency listing, or certification information, so do not assume additional certifications.
• For an existing installation, check the breaker nameplate and applicable equipment documentation for any required listings or compliance information. It's also a good idea to compare the complete specifications—not just the part number. The 1800A rating, three poles, Type PB design, voltage and AIC ratings, trip settings, and physical dimensions should all match the equipment.

Where It Works Best

• The PB31800 1800A circuit breaker is best suited to compatible legacy electrical equipment designed for this Type PB, 3-pole configuration. It's especially relevant when you're maintaining an existing system and need a breaker with the correct physical footprint and electrical ratings rather than changing the equipment's original setup.
• Before putting a PB31800 into service, compare it directly with the existing installation requirements. Check the part number, 1800-amp rating, three-pole arrangement, voltage, AIC rating, magnetic trip range, Type PB configuration, and dimensions. Physical fit by itself isn't enough to establish compatibility.