EH34090 - 90 Amp Circuit Breaker

EH34090 - 90 Amp Circuit Breaker

When you're replacing a breaker in an existing setup, the last thing you want is guesswork. The EH34090 circuit breaker is built to match EF-4 frame panelboards, so it fits the way it should and works with the system you already have in place. Rated at 90 amps with a 3-pole configuration, it’s commonly used in three-phase applications where steady, reliable protection is needed. This breaker uses a thermal magnetic trip mechanism, which means it responds differently depending on the situation—handling longer overloads with a delayed response while reacting quickly to short circuits. That balance helps protect both wiring and equipment without overcomplicating things. With interrupting ratings of 14kA at 480VAC and 65kA at 240VAC, it’s designed to operate within standard system requirements found in many commercial and industrial environments. It’s a straightforward, dependable component made for systems that are expected to keep running.

Key Features and Benefits

• 90 amp rating suited for a range of commercial and industrial loads
• 3-pole design for use in three-phase electrical systems
• Thermal magnetic trip for both overload and short-circuit protection
• Plug-on connection for direct installation into compatible panelboards
• Designed for EF-4 frame equipment to ensure proper fit
• Interrupting ratings of 14kA @ 480VAC and 65kA @ 240VAC
• Built for long-term use in established electrical systems

Technical Specifications

• Part Number: EH34090
  
• Amperage: 90A
  
• Poles: 3
  
• Frame Type: EF-4
  
• Voltage Rating: Up to 480VAC
  
• Interrupting Capacity:
  • 14kA @ 480VAC
  • 65kA @ 240VAC
• Mounting Style: Plug-On
  
• Trip Type: Thermal Magnetic
  
• Weight: Approximately 3.5 lbs
  
• Height: 3.5 inches
  

Material Compliance and Certifications

• Manufactured to meet commonly accepted UL and ANSI standards for circuit breakers
• Suitable for installations following NEC (National Electrical Code) requirements
• Constructed with materials intended for consistent electrical performance over time

Where It Works Best

• Commercial buildings and office spaces
• Industrial facilities and production areas
• Schools, hospitals, and large institutions
• Existing panelboards that require EF-4 frame breakers