EJB24020 - 20 Amp Circuit Breaker

EJB24020  - 20 Amp Circuit Breaker

If you're replacing a breaker in a compatible Square D NF panelboard, the Square D EJB24020 is built for the job. This 20 Amp, 2-pole E-Frame circuit breaker is designed to provide dependable protection against overloads and short circuits in commercial electrical systems. Its thermal-magnetic trip unit reacts automatically to changing electrical conditions, while the built-in trip indicator lets you quickly see when the breaker has tripped, making routine inspections and troubleshooting a little easier.

The EJB24020 is commonly found protecting lighting, HVAC equipment, and other branch circuits where consistent operation matters every day.

Key Features and Benefits

• Designed for Compatible Square D NF Panelboards: Provides proper form, fit, and functional replacement.
• 20 Amp Continuous Current Rating: For commercial branch circuit protection.
• Two-Pole Design: Protects two energized conductors.
• Thermal-Magnetic Trip Unit: Helps guard against overloads and short circuits.
• Bolt-On Mounting: Provides a secure installation in compatible panelboards.
• Built-In Trip Indicator: Allows quick visual identification after the breaker trips.
• High Interrupting Capacity: Up to 100 kA in applicable voltage configurations.
• Compatible Conductors: Accepts both copper and aluminum conductors for installation flexibility.
• HACR and HID Rated: Approved for HVAC and lighting applications.
• Calibrated for 40°C (104°F): Designed for operation at 40°C (104°F).
  

Technical Specifications

• Manufacturer: Square D
  
• Catalog Number: EJB24020
  
• Product Type: E-Frame Miniature Circuit Breaker
  
• Frame Series: 125 A Frame EDB/EGB/EJB
  
• Rated Current: 20 Amps
  
• Poles: 2
  
• Maximum Operating Voltage: 480Y/277 VAC
  
• Mounting Type: Bolt-On
  
• Trip Unit: Thermal-Magnetic
  
• Protection: Overload and Short-Circuit
  
• Interrupting Capacity:
  • 100 kA @ 120 VAC
  • 100 kA @ 120/240 VAC
  • 100 kA @ 240 VAC
  • 65 kA @ 277 VAC
  • 65 kA @ 480Y/277 VAC
• Trip Unit Rating: 875 A
  
• Holding Current: 270 A
  
• Connections: Aluminum lugs
  
• Compatible Wire Sizes:
  • Copper: 14 AWG–6 AWG
  • Aluminum: 12 AWG–6 AWG
• Tightening Torque: 30.09 lb-in (3.4 N·m)
  
• Panel Spaces Required: 2
  
• Dimensions:
  • Height: 5.66 in.
  • Width: 1.96 in.
  • Depth: 4.05 in.
• Weight: 3 lb (1.4 kg)
  
• Operating Temperature: Up to 104°F (40°C)
  

Material Compliance and Certifications

The Square D EJB24020 is cULus Listed, TAA Compliant, and carries HACR and HID ratings for approved HVAC and high-intensity discharge lighting applications. Designed for use in compatible Square D NF panelboards, it meets recognized North American safety standards while providing the form, fit, and functional compatibility needed for maintaining existing electrical systems.

Where It Works Best

The Square D EJB24020 is a practical choice for commercial, institutional, and light industrial facilities that use compatible Square D NF panelboards. It's often installed in offices, schools, hospitals, retail stores, warehouses, and manufacturing facilities where dependable branch circuit protection is needed for lighting, HVAC equipment, and general power distribution.