HNB3900 - 900Amp Circuit Breaker

HNB3900 - 900Amp Circuit Breaker

The HNB3900 is a 900-amp, three-pole thermal-magnetic circuit breaker designed for use in electrical distribution systems that require a matching HNB frame breaker configuration. This circuit breaker is commonly selected for replacement and maintenance applications where maintaining your original breaker style, electrical ratings, and physical fit is important.

Key Features and Benefits

• 900 Amp three-pole thermal magnetic circuit breaker
• HNB frame type for compatible replacement applications
• Interchangeable trip unit design
• Thermal magnetic protection for overload and short-circuit conditions
• Rated for electrical systems up to 600VAC
• AIC ratings available for 240VAC, 480VAC, and 600VAC applications
• Includes load-side terminals
• 40°C temperature rating
• Designed to maintain existing breaker configuration and panel compatibility
  

Technical Specifications

• Catalog Number: HNB3900
  
• Product Type: Thermal Magnetic Circuit Breaker
  
• Frame Type: HNB
  
• Amperage Rating: 900 Amps
  
• Poles: 3
  
• Voltage Rating: Up to 600VAC
  
• A.I.C. Rating:
  • 25kAIC at 600VAC
  • 35kAIC at 480VAC
  • 65kAIC at 240VAC
• Trip Type: Thermal Magnetic
  
• Trip Unit: Interchangeable Trip Unit
  
• Temperature Rating: 40°C
  
• Terminals: Includes Load-Side Terminals
  
• Dimensions: 8.25"W x 16.00"L x 5.50"D
  
• Height: 16.0 inches
  
• Width: 8.25 inches
  
• Depth: 5.5 inches
  
• Approximate Ship Weight: 55.00 lbs
  

Material Compliance and Certifications

The HNB3900 is designed for use as a replacement thermal magnetic circuit breaker in compatible HNB-frame electrical equipment. It is intended for applications where maintaining existing system specifications, breaker fit, and installation requirements is necessary. Installation should be performed by qualified electrical personnel and completed in accordance with applicable electrical codes, safety practices, and equipment guidelines.

Where It Works Best

• Industrial electrical distribution equipment
• Commercial power distribution systems
• Existing HNB-frame breaker installations
• Feeder circuit protection applications
• Larger electrical systems requiring a 900 Amp three-pole breaker
• Maintenance and replacement work in installed equipment
• Applications requiring interchangeable trip unit functionality
• Systems requiring specific interrupt ratings at 240VAC, 480VAC, or 600VAC