KA3090 - 90Amp Circuit Breaker

KA3090 - 90Amp Circuit Breaker

When you're looking for a KA3090 circuit breaker, there are a handful of details you'll want to check before calling it a match. This model is rated 90 amps, has three poles, and uses a thermal-magnetic design with an interchangeable trip unit. The KA3090 is built to last, but replacement work still comes down to matching the details—not assumptions. Check the amperage, pole count, Type KA designation, trip-unit arrangement, A.I.C. ratings, terminals, and dimensions against the breaker already in your equipment.

Key Features and Benefits

• 90A, three-pole configuration provides clear electrical identifiers when matching an existing breaker.
• Type KA designation helps narrow compatibility with equipment already in service.
• Uses a thermal-magnetic design with an interchangeable trip unit.
• 40°C rated according to the supplied specifications.
• Load-side terminals are included, so you know exactly what is supplied with this configuration.
• Well suited to form, fit, and function replacement where the complete KA3090 specifications match the existing installation.
  

Technical Specifications

• Part Number: KA3090
  
• Product Type: Circuit Breaker
  
• Type: KA
  
• Amperage: 90A
  
• Poles: 3
  
• Trip Design: Thermal-Magnetic
  
• Trip Unit: Interchangeable
  
• Temperature Rating: 40°C
  
• A.I.C. at 240VAC: 25 kA
  
• A.I.C. at 480VAC: 22 kA
  
• A.I.C. at 600VAC: 22 kA
  
• Load-Side Terminals: Included
  
• Width: 5.50 in.
  
• Height / Length: 10.13 in.
  
• Depth: 3.94 in.
  
• Overall Dimensions: 5.50" W × 10.13" L × 3.94 "D
  
• Approximate Ship Weight: 16.00 lb.
  

Material Compliance and Certifications

No specific UL, CSA, IEC, RoHS, REACH, or other certification or material compliance information was provided in the available KA3090 specifications. These approvals should not be assumed. Where a particular certification or compliance requirement applies, confirm it against the appropriate product documentation before installation.

Where It Works Best

The KA3090 90A 3-pole circuit breaker is a practical choice for compatible existing and legacy electrical equipment that specifically calls for a Type KA thermal-magnetic breaker with an interchangeable trip unit. Its published dimensions and electrical ratings also give maintenance teams, electricians, and parts buyers concrete information to compare with the breaker being replaced.