NPX3B160 - 1600Amp Circuit Breaker

NPX3B160 - 1600Amp Circuit Breaker

If you’re trying to match a breaker in an existing Siemens electrical system, the details matter. The Siemens NPX3B160 is a Type NPG molded case circuit breaker with a PG frame, 1600A rating, and 3-pole configuration. It is rated 25 kAIC at 600 VAC and 35 kAIC at 480 VAC. The breaker measures approximately 18.898 inches high, 11.811 inches wide, and 9.843 inches deep. Check those dimensions closely when replacing a breaker in older equipment, since amperage alone doesn’t determine whether a breaker is the right match. For maintenance work on compatible Siemens systems, the NPX3B160 provides the specific form, fit, and electrical characteristics for this application. It’s a straightforward choice when the existing equipment calls for these specifications, and it’s built to last when used within its intended ratings and application.

Key Features and Benefits

• 1600A, 3-pole configuration for systems designed around these electrical requirements.
• Siemens Type NPG, Frame PG configuration for compatible equipment.
• Rated 25 kAIC at 600VAC and 35 kAIC at 480VAC.
• Clearly defined dimensions make it easier to compare the breaker with an existing installation.
• Useful for maintaining legacy Siemens electrical distribution equipment where matching the original form, fit, and function is important.
• Built to last when properly installed and used within its specified ratings.

Technical Specifications

• Part Number: NPX3B160
  
• Manufacturer: Siemens
  
• Product Type: Molded Case Circuit Breaker
  
• Type: NPG
  
• Frame: PG
  
• Poles: 3
  
• Amperage: 1600A
  
• AIC Rating & Voltage: 25k @ 600VAC; 35k @ 480VAC
  
• Height: 18.898 in.
  
• Width: 11.811 in.
  
• Depth: 9.843 in.
  

Material Compliance and Certifications

• Confirm certification and material-compliance details using the markings on the specific NPX3B160 breaker and applicable manufacturer documentation. Since the available specifications do not include certification information, we make no additional UL, CSA, RoHS, or other compliance claims here.
• As with any replacement circuit breaker, check compatibility with the equipment and applicable electrical requirements before installation.

Where It Works Best

• The Siemens NPX3B160 makes the most sense in compatible legacy Siemens electrical equipment that requires a Type NPG, PG-frame, 1600A, 3-pole molded case circuit breaker with the ratings listed above.
• Replacing an existing NPX3B160? Start with the part number, then compare the details. Check the frame, amperage, number of poles, AIC and voltage ratings, physical dimensions, mounting arrangement, and electrical connections. That extra verification is important because two breakers with the same amp rating aren’t necessarily interchangeable.
• For facilities keeping existing Siemens equipment in service, the NPX3B160 is primarily about getting the match right. When its specifications match the application, it provides the form, fit, and function the existing system needs without changing what the equipment was designed to use.