Square D EJB34090 Molded Case Circuit Breaker

Overview

The Square D EJB34090 is a 90-amp, 3-pole, bolt-on molded case circuit breaker designed for industrial and commercial applications. It is part of the E-Frame series and is suitable for use in Square D NF panelboards. This breaker offers reliable protection against overloads and short circuits, ensuring the safety and longevity of your electrical systems.

Key Specifications

• Amperage Rating: 90A

• Voltage Rating: 480Y/277V AC

• Interrupting Capacity: 65 kA at 480Y/277V AC

• Trip Type: Thermal/Magnetic

• Trip Range: 1000–2300A

• Mounting Type: Bolt-On

• Frame Type: E

• Temperature Rating: 40°C

• Wire Size Compatibility:

  • Copper: 14–2/0 AWG

  • Aluminum: 12–2/0 AWG

• Material: Thermoset Composite Resin

• Certifications: UL Listed, CSA Certified, HACR Rated

• Dimensions: 4.05" L × 2.94" W × 5.66" H

Features & Benefits

• High Interrupting Capacity: Withstands fault currents up to 65 kA at 480Y/277V AC, ensuring reliable protection.

• Thermal/Magnetic Trip Mechanism: Provides both overload and short-circuit protection, enhancing system reliability.

• Bolt-On Mounting: Ensures secure installation in compatible panelboards.

• Wide Wire Size Compatibility: Accommodates a range of wire sizes, offering flexibility in installations.

• HACR Rated: Suitable for circuits powering heating, air conditioning, and refrigeration equipment.

Applications

• Industrial Panelboards: Ideal for use in Square D NF panelboards requiring a 90A 3-pole breaker.

• Commercial Electrical Systems: Provides reliable protection in commercial electrical installations.

• Motor Protection: Safeguards motors from overloads and short circuits.

• Subpanels: Useful in subpanels where additional circuits are needed without adding more breakers.