3VA5240-5ED31-0AA0 - MFAS 40 Amp Circuit Breaker

3VA5240-5ED31-0AA0 - MFAS 40 Amp Circuit Breaker

Some breakers look good on paper but don’t hold up when it counts. This one does. The Siemens 3VA5240-5ED31-0AA0 is a straightforward, no-drama 40 amp, 3-pole circuit breaker built for real electrical systems—not lab conditions. You install it, it protects, and you move on. That’s the whole point. With a 35kA interrupting rating at 480V, it’s ready for serious fault conditions. The thermal magnetic trip handles both overloads and sudden shorts without needing constant tweaking. Everything is factory set, so there’s nothing to dial in or second-guess later. It’s part of the 3VA5 line, which a lot of contractors stick with for a reason—it’s consistent. No surprises, no weird behavior, just solid protection where you need it.

Key Features and Benefits

• 40A rating for dependable circuit protection
• 35kA @ 480V interrupting capacity for higher fault levels
• Thermal magnetic trip reacts to both overloads and short circuits
• Fixed settings—install it and you’re done
• 3-pole design for three-phase applications
• Compact frame that doesn’t eat up panel space
• Built to handle everyday commercial and industrial use

Technical Specifications

• Part Number: 3VA5240-5ED31-0AA0
• Series: 3VA5
• Frame: 3VA52 (250A frame)
• Poles: 3
• Amps: 40
• A.I.C.: 35kA @ 480V
• Trip Unit: Thermal Magnetic (TM210)
• Overload (Ir): 40A fixed
• Instantaneous (Ii): 10x In
• Size: 9.65" H × 6.3" W × 5.9" D

Material Compliance and Certifications

• UL listed
• Meets standard U.S. electrical safety requirements
• Built with durable, field-proven components

Where It Works Best

• Commercial panels
• Industrial equipment
• Three-phase distribution systems
• Manufacturing environments
• Replacement for existing Siemens setups