HP3B120 - 1200Amp Circuit Breaker

HP3B120 - 1200Amp Circuit Breaker

The HP3B120 is a 1200-amp, 3-pole HP3 molded-case circuit breaker designed for use with compatible electrical distribution equipment. For maintenance teams working with existing or legacy systems, the important thing is getting the details right—not simply finding another breaker with the same amperage. When your application specifically calls for this HP3 configuration and the ratings match those of the existing equipment, the HP3B120 offers a straightforward replacement solution built to last in its intended use.

Key Features and Benefits

• 1200A rating for applications requiring a 1200-amp molded case circuit breaker.
• 3-pole design for compatible three-phase electrical systems.
• HP3 configuration helps maintenance personnel identify the correct breaker type for existing equipment.
• 40°C rating provides another important specification to check when matching an existing breaker.
• Measures 9.00" W x 15.50"L x 4.75"D, making physical dimensions easy to compare with the existing installation.
• Well-suited for form, fit, and functional replacement when the HP3B120 specifications match the system requirements.
  

Technical Specifications

• Part Number: HP3B120
  
• Type: HP3
  
• Breaker Type: Molded Case Circuit Breaker
  
• Amperage: 1200A
  
• Poles: 3
  
• AIC Rating at 600VAC: 42k
  
• AIC Rating at 480VAC: 50k
  
• AIC Rating at 240VAC: 65k
  
• Temperature Rating: 40°C
  
• Width: 9.0 in.
  
• Height / Length: 15.5 in.
  
• Depth: 4.75 in.
  
• Dimensions: 9.00"W x 15.50"L x 4.75"D
  
• Approx. Shipping Weight: 60.00 lbs.
  

Material Compliance and Certifications

No specific material compliance, agency certification, or listing information was included in the supplied specifications for the HP3B120. For that reason, UL, CSA, RoHS, or similar compliance should not be assumed based on this description alone.

If a particular certification or material standard is required for the installation, check the breaker nameplate and applicable equipment documentation before use.

Where It Works Best

The HP3B120 1200A 3-pole circuit breaker makes the most sense for existing electrical systems where an HP3 molded-case breaker with these specific ratings and dimensions is required. This is especially important with legacy equipment, where maintaining the correct physical footprint and electrical characteristics can be just as important as matching the amperage.

Before using the HP3B120 as a replacement, carefully compare it with the existing breaker. Check the HP3 type, 1200A rating, three-pole configuration, operating voltage, required AIC rating, 40°C rating, and physical dimensions. A breaker that looks similar—or even carries the same amperage—isn't automatically interchangeable.