NEF431040 - 40Amp Circuit Breaker

NEF431040 - 40 Amp Circuit Breaker

The NEF431040 Circuit Breaker is a 3-pole, 40 amp molded case circuit breaker designed for dependable protection in commercial and industrial electrical panels. Built with a thermal magnetic trip mechanism, it helps guard against both overloads and short circuits—protecting wiring, equipment, and connected systems from damage. With its bolt-on mounting design, this breaker provides a secure, stable connection to the panelboard bus, which is especially important in high-demand three-phase environments. For maintenance replacements or panel upgrades, the NEF431040 offers a straightforward, compatible solution that keeps your electrical system operating safely.

Key Features and Benefits

• Thermal Magnetic Protection: Responds to prolonged overloads and instant short circuits to reduce risk of system failure.
• 3-Pole Design: Built for use in three-phase power distribution systems.
• 40 Amp Rating: Suitable for protecting branch circuits and equipment requiring 40A overcurrent protection.
• Bolt-On Mounting: Secures firmly to compatible NEF panelboards for reliable electrical contact.
• High Interrupting Capacity: Rated 14kAIC at 480VAC and 18kAIC at 240VAC to handle fault conditions with confidence.

Technical Specifications

• Model: NEF431040
• Poles: 3
• Amperage Rating: 40 Amps
• Voltage Rating: Up to 480VAC
• Interrupting Capacity: 14kA @ 480VAC; 18kA @ 240VAC
• Frame Type: NEF
• Trip Type: Thermal Magnetic
• Mounting Style: Bolt-On
• Dimensions: 4.13" W x 6.19" L x 3.38" D
• Breaker Type: Molded Case Circuit Breaker

Material Compliance and Certifications

• UL Listed: Tested and listed to meet recognized safety standards.
• IEC Standards Compliance: Manufactured in accordance with applicable international guidelines.
• Quality Construction: Built using durable components designed for consistent long-term performance.

Where It Works Best

• The NEF431040 3-pole 40A circuit breaker is commonly installed in commercial buildings, industrial facilities, and other three-phase electrical systems where dependable overcurrent protection is required. It is well suited for use in compatible NEF panelboards to protect branch circuits, distribution equipment, and connected loads. Whether used for routine maintenance or equipment replacement, this breaker helps maintain safe and efficient power distribution.