3VA5280-7EF31-0AA0 - CFAS 80 Amp Circuit Breaker

3VA5280-7EF31-0AA0 - CFAS 80 Amp Circuit Breaker

When you’re working in a system with high available fault current, you need a breaker that’s not going to hesitate. The Siemens 3VA5280-7EF31-0AA0 is built for exactly that—solid, predictable protection without overcomplicating things. This 80 amp, 3 pole circuit breaker from the Siemens 3VA52 series is designed for line protection in commercial and industrial setups. It uses a thermal-magnetic trip unit, so you’re covered on both overloads and short circuits. Nothing fancy—just proven protection that does what it’s supposed to do. With a 100kA interrupting rating at 480V, it’s a good fit for applications where fault current is high and failure isn’t an option. The trip settings are fixed, so there’s no dialing things in or second-guessing adjustments. Install it, wire it, and move on. If you’ve worked with Siemens breakers before, you already know what to expect—consistent build quality and dependable performance.

Key Features and Benefits

• 100kA interrupting rating at 480V: Handles high fault current environments
• 80 amp rating: Common choice for commercial and industrial loads
• 3 pole design: Built for three-phase systems
• Thermal-magnetic trip unit (TM240): Covers both overload and short circuit protection
• Fixed trip settings: No setup or calibration required
• UL Frame 250 (3VA5 series): Compact size, easy to integrate into panels
• C-interrupting class (CFAS): Designed for consistent fault interruption

Technical Specifications

• Part Number: 3VA5280-7EF31-0AA0
  
• Series: Siemens 3VA52
  
• Amperage: 80A
  
• Poles: 3
  
• Voltage Rating: Up to 480V
  
• Interrupting Capacity: 100kA @ 480V
  
• Trip Unit: Thermal Magnetic (TM240)
  
• Overload Protection (Ir): Fixed at 80A
  
• Short-Circuit Protection (Ii): 10 × In
  
• Frame Size: UL Frame 250
  
• Dimensions:
  • Height: 9.65 in
  • Width: 6.3 in
  • Depth: 5.9 in

Material Compliance and Certifications

• UL Listed for use in North American electrical systems
• Meets standard low-voltage distribution safety requirements
• Built to Siemens manufacturing and quality standards

Where It Works Best

• Commercial buildings
• Industrial equipment and control panels
• Distribution boards and switchgear
• Facilities with high available fault current
• Retrofit or replacement jobs where reliability matters