EB3050 - 50Amp Circuit Breaker

EB3050 - 50 Amp Circuit Breaker

The EB3050 circuit breaker is a 3-pole, 50-amp thermal-magnetic circuit breaker designed for use in compatible EB-frame electrical distribution equipment manufactured prior to 1989. Built to provide dependable circuit protection, this breaker helps safeguard electrical systems from overloads and short circuits in commercial and industrial environments. The non-interchangeable trip unit ensures a fixed and consistent protection level, while the thermal-magnetic mechanism responds to both sustained overload conditions and instantaneous fault currents. Rated at 10kA interrupting capacity at 240VAC and calibrated for 40°C operation, the EB3050 is intended as a form, fit, and function replacement for existing equipment where maintaining compatibility with legacy panel designs is essential. Load terminals are included to support proper installation in systems originally configured for this breaker style. Like many breakers from this generation, it was built with durability in mind and intended for long service in established electrical infrastructure.

Key Features and Benefits

• 50 Amp Continuous Rating: Designed to provide consistent overcurrent protection for circuits requiring a 50A rating.
• 3-Pole Configuration: Supports three-phase electrical distribution systems commonly found in commercial and industrial facilities.
• Thermal-Magnetic Protection: Combines thermal overload protection with instantaneous magnetic response for short-circuit conditions.
• 10kA Interrupting Capacity at 240VAC: Suitable for systems where this fault current rating is required.
• Non-Interchangeable Trip Unit: Fixed trip design helps maintain consistent circuit protection characteristics.
• Includes Load Terminals: Supplied with terminals for proper connection to load conductors.
• Designed for Legacy Panels: Manufactured for use in panelboards and systems produced before 1989 that require EB-frame breakers.
• Durable Construction: Built to last and intended for long-term service in established electrical installations.

Technical Specifications

• Part Number: EB3050
  
• Frame Type: EB
  
• Amperage Rating: 50 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC
  
• Interrupting Rating: 10kA @ 240VAC
  
• Trip Unit Type: Thermal-Magnetic (Non-Interchangeable)
  
• Temperature Rating: 40°C
  
• Load Terminals: Included
  
• Approximate Shipping Height: 6.0 in
  
• Shipping Weight: 4.13 lbs
  
• Intended Equipment: Panels manufactured prior to 1989 compatible with EB-frame breakers
  

Material Compliance and Certifications

• Industry Standards: The EB3050 circuit breaker was manufactured in accordance with electrical industry standards applicable at the time of production and intended installation.
• UL and NEC Considerations: When properly installed in compatible equipment and maintained according to electrical codes and manufacturer guidelines, breakers of this type are commonly used in systems designed to meet UL and NEC electrical safety requirements applicable to molded case circuit breakers.

Where It Works Best

• The EB3050 3-pole 50A circuit breaker is typically used in electrical distribution systems that rely on EB-frame breakers installed in panelboards produced before 1989. It is commonly found in:
  • Commercial facilities maintaining existing electrical infrastructure
  • Industrial buildings with legacy power distribution equipment
  • Maintenance and repair projects requiring direct replacement breakers
  • Electrical systems where matching the original breaker design is necessary for proper fit and operation
  Its design supports situations where maintaining the original panel configuration and electrical ratings is important, making it suitable for technicians and facility managers servicing established electrical systems.