ET5913 - 125Amp Circuit Breaker

ET5913 - 125 Amp Circuit Breaker

If you’re responsible for keeping power systems running without surprises, the ET5913 circuit breaker is the kind of component you don’t want to overlook. This 125-amp, 3-pole molded case circuit breaker is built to step in instantly when things go wrong—stopping overloads and short circuits before they turn into costly downtime or damaged equipment. Designed for 480VAC systems and rated at 14kA interrupting capacity, it gives you the confidence that your electrical infrastructure is protected where it matters most. What makes this breaker especially practical is how easily it fits into real-world applications. The J frame design integrates smoothly into existing setups, while its 40°C rating means it keeps performing even in warmer operating environments. Whether you’re managing a facility, upgrading a panel, or replacing a critical component, the ET5913 delivers dependable protection without overcomplicating the job.

Key Features and Benefits

• Reliable 125 Amp Protection: Keeps circuits safe from overloads and faults without nuisance tripping
• 3-Pole Design: Ideal for three-phase systems requiring balanced, consistent protection
• 14kA @ 480VAC Interrupting Capacity: Stops high fault currents quickly to prevent equipment damage
• J Frame Compatibility: Makes installation and replacement straightforward in many setups
• Performs in Heat (40°C Rated): Built to handle demanding environments without performance drop-off
• Molded Case Construction: Designed for long-term use and consistent operation

Technical Specifications

• Part Number: ET5913
• Amperage: 125 Amps
• Poles: 3
• Voltage Rating: 480VAC
• Interrupting Capacity: 14kA @ 480VAC
• Frame Type: J Frame
• Temperature Rating: 40°C
• Type: Molded Case Circuit Breaker
• Shipping Size/Weight: 11.0 (height), 9.0 (weight)

Material Compliance and Certifications

• Industry Standards: The ET5913 is manufactured using durable insulating materials and precision-engineered internal components designed to meet widely accepted electrical safety and performance standards.
• UL and IEC Guidelines: Molded case circuit breakers in this class are typically aligned with UL and IEC guidelines, helping ensure dependable operation in regulated commercial and industrial environments. Always verify specific certification requirements based on your project.

Where It Works Best

This breaker is a strong fit for commercial buildings, industrial facilities, and heavy-duty electrical systems where dependable three-phase protection is essential. You’ll commonly see it used in panelboards, switchgear, HVAC systems, motor control centers, and manufacturing equipment—anywhere consistent power and equipment protection are critical to daily operations.