PB31000 - 1000Amp Circuit Breaker

 PB31000 - 1000Amp Circuit Breaker

When you're replacing a circuit breaker in an existing electrical system, the details have to line up. The PB31000 is a Type PB, 1000-amp, 3-pole thermal-magnetic circuit breaker with a rear-connected design. It is rated 100k AIC at 600VAC, 100k AIC at 480VAC, and 125k AIC at 240VAC, and carries a 40°C rating. Its thermal-magnetic design protects against overload and fault-current conditions when used within its specified ratings. Just as important for replacement work are the physical details: the PB31000 measures 22.13 inches high, 12.06 inches wide, and 9.06 inches deep. Those dimensions, along with the pole count, amperage, connection style, and electrical ratings, should all be checked against the breaker being replaced and the requirements of the existing equipment. For facilities maintaining compatible Type PB electrical systems, the PB31000 is a practical choice when the application calls for these specific form, fit, and functional characteristics. It's a substantial electrical component built to last when properly installed, operated, and maintained.

Key Features and Benefits

• 1000 amp rating for compatible power distribution applications
• 3-pole configuration for systems requiring three-pole circuit protection
• Thermal magnetic trip design for overload and fault-current protection
• Rated 100k AIC at 600VAC
• Rated 100k AIC at 480VAC
• Rated 125k AIC at 240VAC
• Rear-connected configuration for equipment designed around this connection style
• 40°C rated
• Type PB design for matching compatible existing equipment.
• Built for long-term use when correctly applied and maintained

Technical Specifications

• Part Number: PB31000
  
• Type: PB
  
• Breaker Type: Thermal Magnetic Circuit Breaker
  
• Amperage: 1000A
  
• Poles: 3
  
• AIC Rating: 100k @ 600VAC
  
• AIC Rating: 100k @ 480VAC
  
• AIC Rating: 125k @ 240VAC
  
• Temperature Rating: 40°C
  
• Connection: Rear-connected
  
• Dimensions:
  • Height: 22.13 in.
  • Width: 12.06 in.
  • Depth: 9.06 in.

Material Compliance and Certifications

• The available specifications do not include specific material compliance information or certification/agency listing details for the PB31000. Requirements can differ by equipment, installation, and local electrical codes, so confirm any required certifications or compliance markings directly from the breaker labeling and applicable documentation.
• Do not assume UL, CSA, RoHS, or other certification status unless the appropriate marking or documentation confirms it.

Where It Works Best

• The PB31000 is intended for compatible commercial and industrial electrical distribution equipment that requires a 1000A, 3-pole, Type PB thermal magnetic circuit breaker with rear connections. It is particularly relevant when maintaining an existing or legacy system where matching the original breaker's physical configuration and electrical ratings is the priority.
• For replacement applications, don't rely on amperage alone. Check the part number, Type PB designation, three-pole configuration, voltage and AIC ratings, rear-connected design, 40°C rating, and physical dimensions against the existing breaker and equipment requirements.
• When those specifications match, the PB31000 provides the form, fit, and function needed to keep compatible equipment in service. A qualified electrical professional should verify final compatibility and installation and ensure it meets all applicable electrical codes and equipment requirements.