EJB34090 - 90 Amp Circuit Breaker

EJB34090 - 90 Amp Circuit Breaker

The Schneider Electric EJB34090 90 Amp E‑Frame circuit breaker is a high‑performing protection device built for commercial lighting panels and industrial power systems. This 3‑pole breaker operates at 480Y/277 VAC and offers an outstanding 100 kA interrupting capacity at 120 VAC — giving you strong safeguard against overloads and short circuits. Whether installed in a new wiring layout or replacing an older breaker, the EJB34090 ensures stable, long-term operation and helps keep equipment and wiring protected under heavy loads. Its bolt‑on design simplifies installation on compatible panelboards, making this circuit breaker a dependable choice for contractors and facility managers alike.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Accurately detects overload and fault conditions to prevent damage to circuits and connected devices.
• HACR Rated: Approved for use in heating, air conditioning, and refrigeration applications — giving you flexibility for HVAC systems, lighting, or general power distribution.
• Bolt-On Mounting: Offers secure, easy installation into panelboards and ensures stable electrical connection and mechanical support.
• Long-Lasting Build: Designed for decades of service life, delivering consistent protection over 20 years or more under normal conditions.
• High Interrupting Capacity: With up to 100 kA at 120 VAC, this breaker can safely handle significant fault currents, safeguarding installations from potentially damaging surges.

Technical Specifications

• Product Range: 125 A Frame EDB‑EGB‑EJB
• Device Short Name: EJB
• Module Type: E‑Frame (3‑pole)
• Line Rated Current: 90 A
• Maximum Operating Voltage: 480Y/277 VAC
• Supported Conductors: Aluminum AWG 12…2/0, Copper AWG 14…2/0
• Interrupting Capacity:
  • 65 kA @ 277 VAC
  • 100 kA @ 120 VAC/240 VAC
  • 65 kA @ 480Y/277 VAC
• Trip Unit Rating: 2300 A
• Mounting Mode: Bolt-on (panelboard installation)
• Dimensions (H × W × D): 5.66 in × 2.94 in × 4.05 in
• Net Weight: 4 lb (1.81 kg)
• Tightening Torque: 34.52 lbf·in (AWG 14…10), 49.56 lbf·in (AWG 8…2/0)
• Trip Indicator: Yes — local signaling for fault identification

Material Compliance and Certifications

• cULus Certified: Meets safety and performance standards recognized in the U.S. and Canada.
• RoHS & REACH Compliant: Free from restricted hazardous substances, supporting safer and environmentally friendly installations.
• Mercury-Free Design: Adds a layer of environmental safety and aligns with modern sustainability expectations.

Where It Works Best

• The EJB34090 is an excellent fit for commercial, industrial, and institutional settings where reliable protection of lighting circuits, HVAC systems, or general power distribution is critical. It performs especially well in panelboards requiring bolt-on E‑Frame breakers — such as standard lighting panelboards or branch circuits feeding HVAC or heavy equipment. Whether you’re wiring a new facility, upgrading older breakers, or configuring an industrial control panel, this 90 Amp circuit breaker offers the dependable protection professionals depend on.