EHB3040L - 40Amp Circuit Breaker

EHB3040L - 40 Amp Circuit Breaker

If you're working with an older panel and need a breaker that actually fits and works the way it should, the EHB3040L is built for exactly that purpose. Designed for panelboards manufactured before 1989, this 40-amp, 3-pole circuit breaker helps keep your existing system running without the hassle of retrofitting or guesswork. It uses a thermal-magnetic trip mechanism to handle both overloads and short circuits, giving you dependable protection where it counts. With its fixed, non-interchangeable trip unit, you’re maintaining the original design of your equipment—no surprises, no mismatches. It also comes with line and load terminals included, so installation is straightforward and efficient. Simply put, this is a practical, built-to-last solution for keeping legacy electrical systems in service.

Key Features and Benefits

• 40 Amp, 3-pole breaker designed for three-phase applications
• Thermal-magnetic protection responds to both overloads and short circuits
• Non-interchangeable trip unit maintains original system configuration
• 14kA interrupting capacity at 480VAC for dependable fault protection
• Includes line and load terminals to save time during installation
• Specifically made for pre-1989 panelboards—no modifications required
• Rated for 40°C ambient conditions, suitable for standard environments
• Built with durability in mind for long-term use in the field

Technical Specifications

• Part Number: EHB3040L
• Amperage: 40A
• Poles: 3
• Voltage Rating: 480VAC
• Interrupting Capacity: 14kA @ 480VAC
• Frame Type: EHB
• Trip Type: Thermal-Magnetic (non-interchangeable)
• Temperature Rating: 40°C
• Shipping Height: 6.0 in
• Weight: 4.13 lbs
• Terminals: Line and load included

Material Compliance and Certifications

• Built in accordance with applicable industry standards for molded case circuit breakers
• Designed for use in UL-listed equipment when installed correctly
• Supports compliance with NEC requirements for overcurrent protection
• Suitable for commercial and industrial electrical systems following standard safety practices

Where It Works Best

The EHB3040L is a strong fit for facilities still operating with older electrical distribution equipment. You’ll typically find it used in commercial buildings, industrial sites, and institutional settings where replacing the entire panel isn’t practical. For electricians and maintenance teams, it’s a reliable way to keep legacy systems functioning as intended—no redesign, no unnecessary complications, just the right breaker for the job.