EF3B090 - 90Amp Circuit Breaker

EF3B090 - 90 Amp Circuit Breaker

When you’re dealing with an existing electrical setup, the last thing you want is a breaker that doesn’t quite line up. The EF3B090 molded case circuit breaker is built to match the specs and footprint you already have in place, making it a straightforward solution for keeping your system protected and operating as expected. With a 90-amp rating and a 3-pole configuration, this breaker is commonly used in 3-phase systems where steady, reliable circuit protection is required. It handles fault conditions with interrupting ratings of 14k A.I.C. at both 600VAC and 480VAC, along with 18k A.I.C. at 240VAC. In everyday terms, that means it’s designed to safely interrupt electrical faults before they cause damage. Built for operation at 40°C, it fits right into typical commercial and industrial environments without requiring special conditions. This is the kind of component that does its job quietly in the background—no fuss, no extra adjustments—just consistent protection where it counts.

Key Features and Benefits

• 90-amp rating for stable load handling in 3-phase systems
• 3-pole design supports proper distribution and protection
• Interrupting capacity up to 14k A.I.C. at 600VAC and 480VAC
• Molded case construction helps protect internal components
• Designed for standard 40°C operating environments
• Fits EF3 frame panels for easy, like-for-like replacement

Technical Specifications

• Part Number: EF3B090
  
• Amperes: 90A
  
• Poles: 3
  
• Frame Type: EF3
  
• Interrupting Rating (A.I.C.):
  • 14k @ 600VAC
  • 14k @ 480VAC
  • 18k @ 240VAC
• Operating Temperature: 40°C
  
• Type: Molded Case Circuit Breaker
  
• Dimensions / Shipping Weight:
  • Height: 6.0 inches
  • Weight: 4.5 lbs

Material Compliance and Certifications

• Industry Standards: This breaker is produced in line with recognized electrical industry standards and is suitable for use in systems that follow UL and NEC guidelines.
• Application Note: As with any electrical component, confirming compatibility with your panel and application ensures proper compliance and safe operation.
  

Where It Works Best

• You’ll typically find the EF3B090 in commercial buildings, industrial facilities, and equipment panels that rely on EF3 frame breakers. It’s a practical choice for maintenance, repairs, or replacements where matching the original specifications matters. Whether it’s part of a distribution panel or supporting equipment circuits, it fits in without requiring changes to your existing setup.