EC3070 - 70Amp Circuit Breaker

EC3070 - 70 Amp Circuit Breaker

The EC3070 circuit breaker is a 70-amp, 3-pole thermal-magnetic breaker designed for use in compatible EC-frame panelboards and distribution equipment operating at up to 240VAC. Built to provide dependable overcurrent protection in legacy electrical systems, this breaker combines thermal and magnetic trip elements to respond to both prolonged overload conditions and short-circuit events. Its non-interchangeable trip unit helps maintain consistent protection characteristics, while the included load terminals support straightforward installation in systems that require a direct replacement with the same form, fit, and function. Rated for operation in environments up to 40°C (104°F), the EC3070 is commonly used in commercial and light industrial applications where maintaining compatibility with existing equipment is essential. Like many molded-case breakers from its era, this unit is built to last and designed to support reliable circuit protection in properly maintained electrical distribution systems.

Key Features and Benefits

• 70 Amp Continuous Rating – Suitable for branch or feeder circuit protection within compatible EC-frame equipment.
• 3-Pole Configuration – Designed to protect three-phase electrical circuits commonly found in commercial and industrial installations.
• Thermal-Magnetic Trip Mechanism – Provides response to both overload conditions and instantaneous short circuits.
• 10kA Interrupting Capacity at 240VAC – Designed to safely interrupt fault currents within its rated capacity.
• Non-Interchangeable Trip Unit – Fixed trip characteristics maintain the original protection design of the breaker.
• Includes Load Terminals – Supports proper conductor termination during installation or replacement.
• 40°C Rated Operation – Suitable for typical electrical room and distribution panel environments.
• Form, Fit, and Function Replacement – Designed to match EC-frame systems requiring the same electrical and mechanical configuration.

Technical Specifications

• Part Number: EC3070
  
• Frame Type: EC
  
• Breaker Type: Thermal-Magnetic Molded Case Circuit Breaker
  
• Poles: 3
  
• Current Rating: 70 Amperes
  
• Voltage Rating: 240 VAC
  
• Interrupting Capacity (A.I.C.): 10kA @ 240VAC
  
• Trip Unit: Non-interchangeable
  
• Temperature Rating: 40°C
  
• Load Terminals: Included
  
• Shipping Weight: 4.13 lbs
  
• Shipping Dimensions (Height): 6.0 inches
  

Material Compliance and Certifications

• Industry Standards: The EC3070 circuit breaker is manufactured for use in electrical distribution equipment that meets established North American safety and installation standards.
• UL Standards: Molded case circuit breakers of this class are commonly produced in accordance with UL 489 requirements for molded case circuit breakers and are designed for installation in equipment compliant with the National Electrical Code (NEC) where applicable.
• Always verify compatibility with the intended panelboard or distribution system and ensure installation is performed according to applicable electrical codes and manufacturer guidelines.

Where It Works Best

• The EC3070 is well suited for maintaining existing electrical systems that utilize EC-frame molded case circuit breakers.
• Commercial building distribution panels
• Industrial control panels and machinery power circuits
• Electrical service equipment requiring a 70A three-phase breaker
• Maintenance and repair of legacy electrical distribution systems
• Facilities seeking a direct form-fit-function replacement for EC-frame breakers
• This breaker is intended for use in properly matched equipment where its ratings, mounting style, and electrical characteristics align with the original design of the system.