EJB24030 - 30 Amp Circuit Breaker

EJB24030 - 30 Amp Circuit Breaker

Keeping an existing Square D NF panelboard in service starts with using the right replacement parts. The Square D EJB24030 is a 30 Amp, 2-pole E-Frame circuit breaker built for that exact purpose. It provides overload and short-circuit protection for compatible electrical systems while matching the form and fit of the original equipment. If you're replacing a failed breaker or performing scheduled maintenance, this model is designed to fit where it's supposed to and work the way it's intended.

Inside, the breaker uses a thermal-magnetic trip unit that responds to both long-term overloads and sudden fault conditions. There's also a built-in trip indicator, so it's easy to see when the breaker has opened.

Key Features and Benefits

• Designed for compatible Square D NF panelboards
• 30 Amp, 2-pole bolt-on circuit breaker
• Thermal-magnetic trip unit for overload and short-circuit protection
• Built-in trip indicator for quick visual status checks
• Accepts both copper and aluminum conductors
• Interrupting capacity up to 100 kA in applicable voltage systems
• HACR and HID rated
• Factory calibrated for operation at 40°C (104°F)

Technical Specifications

• Manufacturer: Square D
  
• Catalog Number: EJB24030
  
• Product Type: E-Frame Miniature Circuit Breaker
  
• Series: 125 A Frame EDB / EGB / EJB
  
• Rated Current: 30 Amps
  
• Poles: 2
  
• Maximum Operating Voltage: 480Y/277 VAC
  
• Mounting Type: Bolt-On
  
• Trip Unit: Thermal-Magnetic
  
• Protection: Overload and Short-Circuit
  
• Interrupting Ratings:
  • 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
  
• Electrical Connections: Aluminum lugs
  
• Wire Size:
  • Copper: 14 AWG–6 AWG
  • Aluminum: 12 AWG–6 AWG
• Torque: 30.09 lb-in (3.4 N·m)
  
• Panel Spaces Required: 2
  
• Dimensions:
  • Height: 5.66 in. H
  • Width: 1.96 in. W
  • Depth: 4.05 in. D
• Weight: 3 lb (1.4 kg)
  
• Maximum Ambient Temperature: 104°F (40°C)
  

Material Compliance and Certifications

The Square D EJB24030 is cULus Listed, TAA Compliant, and carries HACR and HID ratings for approved HVAC and high-intensity discharge lighting applications. It's manufactured to meet recognized North American safety standards and is intended for installation in compatible Square D NF panelboards.

Where It Works Best

The EJB24030 is a practical choice for commercial buildings, schools, healthcare facilities, office complexes, retail stores, warehouses, and light industrial sites that use compatible Square D NF panelboards.