3VA5280-5EC31-0AA0 - MFAS 80 Amp Circuit Breaker

3VA5280-5EC31-0AA0 - MFAS 80 Amp Circuit Breaker

If you’ve worked with Siemens breakers before, you already know what this is about. The 3VA5280-5EC31-0AA0 is an 80 amp, 3-pole unit from the 3VA5 line. Nothing fancy here—and that’s the point. It’s built to handle the load, clear a fault when it needs to, and stay out of your way the rest of the time. It’s rated 35kA at 480V, so it holds up in systems where fault current is a real concern. The trip unit is thermal magnetic, factory set—overload at 80 amps, instantaneous at 10x. You don’t have to dial anything in or second-guess settings. It’s ready to go. Size-wise, it’s compact enough to work into most panels without a fight. Install is straightforward. Once it’s in, you’re not thinking about it again—which is exactly how it should be.

Key Features and Benefits

• 80 amp rating for standard load protection
• 35kA interrupting capacity at 480V
• Thermal magnetic trip—simple, proven protection
• Fixed settings (no adjustments needed)
• Instant trip at 10x current for short-circuit conditions
• 3-pole setup for three-phase systems
• Compact design that fits without hassle

Technical Specifications

• Part Number: 3VA5280-5EC31-0AA0
• Series: 3VA52 / 3VA5 frame
• Poles: 3
• Amperage: 80A
• Interrupting Rating: 35kA @ 480V
• Trip Unit: Thermal Magnetic (TM230)
• Overload: Fixed at 80A
• Instantaneous Trip: 10x In
• Dimensions: 9.65" H × 6.3" W × 5.9" D

Material Compliance and Certifications

• UL listed
• Meets standard requirements for molded case circuit breakers
• Suitable for use in compliant commercial and industrial systems

Where It Works Best

• Commercial panels
• Industrial equipment
• Manufacturing setups
• 3-phase distribution systems
• Straight replacements where you need a reliable Siemens unit