EHB3090L - 90Amp Circuit Breaker

EHB3090L - 90 Amp Circuit Breaker

When you’re working with older electrical systems, finding the right breaker isn’t about “new”—it’s about fit, compatibility, and getting things working the way they were designed to. The EHB3090L circuit breaker is built specifically for that purpose. Designed for panels manufactured before 1989, this 90 amp, 3-pole breaker delivers the protection your system expects without guesswork or modification.

At its core, this breaker uses a thermal-magnetic trip mechanism, meaning it reacts appropriately to both prolonged overloads and sudden short circuits. That’s exactly what you want in a commercial or industrial setup where consistency matters. With a 14k A.I.C. rating at 480VAC, it’s equipped to safely interrupt fault conditions within its designed range.

Installation is straightforward thanks to included line and load terminals, and the non-interchangeable trip unit ensures the breaker performs exactly as intended—no adjustments, no surprises. If you’re maintaining or restoring an existing system, this unit helps you keep everything aligned with original specifications while using components built to last.

Key Features and Benefits

• 90 Amp Rating – Handles steady electrical loads in commercial and industrial circuits
• 3-Pole Design – Supports three-phase systems commonly found in larger facilities
• Thermal-Magnetic Protection – Covers both overload conditions and short circuits
• 14k A.I.C. @ 480VAC – Suitable interrupting capacity for many legacy applications
• Fixed (Non-Interchangeable) Trip Unit – Delivers consistent, factory-set performance
• Line & Load Terminals Included – Helps speed up installation and reduce extra parts needed
• 40°C Rated – Designed for standard operating environments
• Built for Legacy Panels – Matches systems manufactured prior to 1989

Technical Specifications

• Part Number: EHB3090L
  
• Amperage: 90A
  
• Poles: 3
  
• Voltage Rating: 480VAC
  
• Interrupting Capacity: 14k A.I.C.
  
• Frame Type: EHB
  
• Trip Type: Thermal-Magnetic (Non-Interchangeable)
  
• Temperature Rating: 40°C
  
• Shipping Weight: 4.13 lbs
  
• Approximate Size Reference: 6.0 (shipping dimension indicator)
  
• Included: Line and load terminals
  

Material Compliance and Certifications

• Manufactured in accordance with recognized industry standards for molded case circuit breakers
• Intended for use in systems aligned with UL-listed or UL-recognized equipment (always confirm panel compatibility)
• Constructed from durable electrical-grade materials designed for long-term use under normal conditions

Where It Works Best

• The EHB3090L is a smart, practical choice when you need a direct replacement in an existing system, not a redesign. It’s especially useful in:
• Commercial buildings operating with original panelboards
• Industrial facilities maintaining older electrical infrastructure
• Service and repair jobs where correct breaker fit is critical
• Retrofit situations where maintaining original specifications matters