EH1B040 - 40Amp Circuit Breaker

EH1B040 - 40 Amp Circuit Breaker

If you’re maintaining an existing electrical system, you know how important it is to find a breaker that fits right the first time. The EH1B040 molded case circuit breaker is built for exactly that purpose—delivering the correct form, fit, and function for EH1 frame applications without the hassle of modifications. Rated at 40 amps with a 14kA interrupting capacity at 277VAC, this single-pole breaker provides steady, reliable protection for branch circuits in commercial and light industrial environments. It’s designed to handle everyday electrical demands at up to 40°C, making it a practical, no-nonsense solution for keeping your system operating the way it was intended.

Key Features and Benefits

• Designed for Compatibility – Fits EH1 frame systems, helping simplify replacements in existing setups
• 40 Amp Rating – Supports consistent protection for standard branch circuits
• 14kA @ 277VAC Interrupting Capacity – Handles fault conditions within its rating to help protect equipment
• Single-Pole Configuration – Ideal for controlling one energized conductor in a circuit
• Built to Last – Solid construction made for long-term use in typical operating conditions
• Thermal-Magnetic Protection – Responds to both overloads and short circuits

Technical Specifications

• Part Number: EH1B040
• Frame Type: EH1
• Poles: 1
• Amperage: 40A
• Interrupting Capacity: 14kA @ 277VAC
• Operating Temperature Rating: 40°C
• Breaker Type: Molded Case Circuit Breaker
• Approximate Shipping Weight: 1.5 lbs
• Dimensions (Height): 6.0 inches

Material Compliance and Certifications

• Manufactured in accordance with industry standards for molded case circuit breakers
• Designed for use in systems that follow established electrical safety codes, including NEC requirements
• Suitable for properly rated installations where code compliance is essential

Where It Works Best

• The EH1B040 is a go-to option for maintaining panelboards and distribution systems already designed for EH1 frame breakers. You’ll typically find it used in commercial buildings, small industrial facilities, and other environments where 40-amp circuit protection is required. It’s especially useful when you need a straightforward replacement that keeps your system running without reconfiguration.