EJB24070 - 70 Amp Circuit Breaker

EJB24070 - 70 Amp Circuit Breaker

The Square D EJB24070 is a 70 Amp, 2-pole bolt-on circuit breaker built for use in compatible Square D NF panelboards. It combines thermal and magnetic trip protection to respond to both sustained overloads and sudden short circuits, helping keep your electrical systems protected during everyday operation. A built-in trip indicator makes it easy to see when the breaker has opened, reducing the time needed for troubleshooting and maintenance. With a maximum operating voltage of 480Y/277 VAC and interrupting ratings up to 100 kA at specified voltages, this breaker is well suited for commercial and industrial power distribution systems.

Key Features and Benefits

• 70 Amp current rating
• Two-pole design
• Bolt-on installation
• Compatible with Square D NF panelboards
• Thermal-magnetic trip unit for overload and short-circuit protection
• Built-in trip indicator for quicker diagnostics
• Interrupting capacity up to 100 kA at applicable voltages
• Accepts copper and aluminum conductors
• HACR rated for heating, air conditioning, and refrigeration equipment
• Compatible with a variety of field-installable accessories
• Calibrated for operation at 40°C (104°F)

Technical Specifications

• Manufacturer: Square D
  
• Catalog Number: EJB24070
  
• Product Type: Miniature Circuit Breaker
  
• Frame Type: E-Frame
  
• Current Rating: 70 Amps
  
• Poles: 2
  
• Mounting Style: Bolt-On
  
• Maximum Operating Voltage: 480Y/277 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Protection: Overload and Short Circuit
  
• Trip Unit Rating: 1800 A
  
• Holding Current: 630 A
  
• Interrupting Ratings:
  • 100 kA @ 120 VAC
  • 100 kA @ 120/240 VAC
  • 100 kA @ 240 VAC
  • 65 kA @ 277 VAC
  • 65 kA @ 480Y/277 VAC
• Wire Range:
  • Copper: 14 AWG–2/0 AWG
  • Aluminum: 12 AWG–2/0 AWG
• Connection Type: Lugs
  
• Panelboard Compatibility: Square D NF Panelboards
  
• Dimensions:
  • Height: 5.66 in. H
  • Width: 1.96 in. W
  • Depth: 4.05 in. D
• Weight: 3 lbs.
  

Material Compliance and Certifications

The Square D EJB24070 is cULus Listed, HACR Rated, and TAA Compliant. It is designed to meet recognized North American safety standards for commercial and industrial electrical applications.

Where It Works Best

The EJB24070 is commonly used in commercial buildings, schools, healthcare facilities, office buildings, retail spaces, and light industrial environments where Square D NF panelboards are installed.