EJB34045 - 45 Amp Circuit Breaker

EJB34045 - 45 Amp Circuit Breaker

The Schneider Electric EJB34045 Miniature Circuit Breaker delivers reliable protection for lighting panelboards and low‑voltage electrical systems. With its 45 A rating and three‑pole configuration, this breaker is engineered to guard against overloads and short circuits in both residential and commercial settings. Built to handle high electrical demands, it operates at up to 480Y/277 VAC. It offers an interrupting capacity of 100 kA — giving you confidence that lighting circuits and other loads stay safe under stress. Compact yet solid, it installs directly onto compatible panelboards and is built to serve your electrical infrastructure for years to come.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: Provides dependable and accurate detection of overload and short‑circuit conditions, enhancing the safety of your system.
• High Interrupt Capacity: Rated up to 100 kA, this breaker is ready for demanding environments — perfect for lighting loads or mixed-use electrical panels.
• Bolt‑On Mounting: Designed for easy, secure installation on compatible panelboards without complicated modifications.
• Long Service Life: Constructed for durability, offering dependable performance for decades under normal operating conditions.
• Compact, Space‑Saving Design: The slim form factor and three‑pole configuration make it an efficient choice for distributed lighting loads or multiple branch circuits.

Technical Specifications

• Line Rated Current: 45 A
• Maximum Operating Voltage: 480Y/277 V AC
• Interrupting Capacity:
  • 65 kA at 277 V AC
  • 100 kA at 240 V AC
  • 65 kA at 480Y/277 V AC
  • 100 kA at 120 V AC
  • 100 kA at 120/240 V AC
• Trip Unit Rating: 1800 A
• Number of Poles: 3
• Mounting Mode: Bolt‑on
• Electrical Connections: Aluminum lugs
• Dimensions:
  • Height: 5.66 in (143.76 mm)
  • Width: 2.94 in (74.68 mm)
  • Depth: 4.05 in (102.87 mm)
• Weight: 4 lb (1.81 kg)
• Ambient Operating Temperature: Up to 104 °F (40 °C)

Material Compliance and Certifications

• Certified to cULus safety standards
• Carries a Green Premium® label, reflecting compliance with modern environmental and low‑CO₂ manufacturing practices
• Compliant with REACh Declaration requirements
• Proactive conformance to EU and China RoHS guidance, where applicable
• Contains no banned hazardous materials under the current regulatory scope

Where It Works Best

• This EJB34045 breaker shines when used in lighting panelboards and low‑voltage distribution systems that require dependable overload and short‑circuit protection. It’s well‑suited for residential buildings, office complexes, retail spaces, or light industrial installations where multiple circuits or three‑phase lighting systems draw moderate loads. If you’re installing or upgrading a panelboard and need a dependable 45 A, 3‑pole breaker with strong interrupting capacity — this unit is a smart, long‑lasting choice for years of safe operation.