EJB34040 - 40 Amp Circuit Breaker

EJB34040 - 40 Amp Circuit Breaker

The EJB34040 is a dependable 40 amp, 3‑pole circuit breaker engineered to deliver reliable protection for lighting panelboards and low‑voltage electronic systems. Operating at 480Y/277 V AC and boasting a high interrupt rating, it capably handles demanding loads while prioritizing safety. With bolt‑on mounting for effortless installation on compatible panelboards and a build that’s designed for long-term service, this breaker combines performance and peace of mind for residential, commercial, and industrial settings.

Key Features and Benefits

• Thermal‑Magnetic Trip Unit: The built-in thermal‑magnetic mechanism effectively shields your electrical setup from overloads and short circuits, keeping your system secure.
• High Interrupt Capacity: With an interrupt rating of up to 100 kA at 120 V AC, this breaker is equipped to handle high-demand situations and potential fault currents without compromising safety.
• Bolt-On Mounting: Designed for direct installation on appropriately configured panelboards, the bolt-on setup ensures a tight, dependable fit — minimizing installation hassle.
• Durable Construction for Long-Term Use: Crafted for longevity, the EJB34040 offers up to 20 years of dependable protection, making it a smart long-term investment for any electrical setup.
• Versatile Application: Ideal for safeguarding lighting circuits and low-voltage electronics in homes, offices, warehouses, or industrial facilities — delivering reliable performance across a wide range of environments.

Technical Specifications

• Line Rated Current: 40 A
• Maximum Operating Voltage: 480Y/277 V AC
• Breaking 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
• Electrical Connection: Aluminum lugs
• Mounting Mode: Bolt-on
• Number of Poles: 3
• Dimensions: 5.66 in (H) × 2.94 in (W) × 4.05 in (D) / 143.8 mm × 74.7 mm × 102.9 mm
• Net Weight: ~4 lb (1.81 kg)
• Ambient Operating Temperature: Up to 104 °F (40 °C)

Material Compliance and Certifications

• cULus Certified: Meets rigorous North American safety and quality standards for circuit protection devices.
• Environmental Responsibility: Carriers the Green Premium label, reflecting attention to environmental impact and regulatory compliance.
• RoHS & REACh Declarations: Compliant with global chemical and materials standards to ensure safe, sustainable performance.

Where It Works Best

• The EJB34040 mini circuit breaker is an excellent choice for protecting lighting panelboards and low-voltage electronics in a variety of environments — from residential and office buildings to commercial facilities and industrial plants. It excels when installed in compatible panelboards requiring a bolt-on breaker and where dependable, long-lasting circuit protection is a priority. If you need a dependable circuit breaker that delivers consistent performance under heavy loads, this unit is a practical, straightforward solution for your electrical system.