3VA5217-5EF31-0AA0 - MFAS 175 Amp Circuit Breaker

3VA5217-5EF31-0AA0 - MFAS 175 Amp Circuit Breaker

If you’re looking for a circuit breaker that does its job without surprises, the Siemens 3VA5217-5EF31-0AA0 is exactly that kind of workhorse. Built for reliability in real-world conditions, this 175-amp, 3-pole breaker protects your system from overloads and short circuits—before they turn into costly downtime. What makes this model stand out is its balance of simplicity and performance. With a 35kA interrupting rating at 480V, it’s ready to handle serious fault conditions, while the thermal magnetic trip unit (TM240) gives you dependable, no-fuss protection. No complicated adjustments, no guesswork—just consistent operation you can count on in commercial and industrial environments. Whether you’re maintaining an existing panel or upgrading your system, this Siemens 3VA5 breaker fits right in and gets to work immediately.

Key Features and Benefits

• Built for Real Protection: 175A capacity handles demanding electrical loads with confidence.
• Three-Phase Coverage: 3-pole design protects your entire system, not just part of it
• High Fault Handling: 35kA interrupting rating at 480V helps prevent serious equipment damage
• Thermal Magnetic Trip Unit (TM240): Combines overload and short-circuit protection in one dependable solution.
• Set-It-and-Forget-It Design: Fixed overload (Ir = 175A) and short-circuit protection (Ii = 10x In) for consistent performance
• Compact 3VA5 Frame (250 Frame Size): Saves panel space without sacrificing capability
• M-Interrupting Class (MFAS): Designed for reliable interruption under demanding conditions
• Built to Last: Siemens engineering means long-term performance you don’t have to second-guess

Technical Specifications

• Manufacturer: Siemens
  
• Part Number: 3VA5217-5EF31-0AA0
  
• Series: 3VA52
  
• Poles: 3
  
• Amperage: 175A
  
• Interrupting Capacity: 35kA @ 480V
  
• Frame Size: 250
  
• Trip Type: Thermal Magnetic (TM240)
  
• Overload Protection (Ir): 175A (fixed)
  
• Short-Circuit Protection (Ii): 10 x In (fixed)
  
• Dimensions (H x W x D): 9.65" x 6.3" x 5.9"
  

Material Compliance and Certifications

• UL Listed: Meets recognized U.S. safety and performance standards.
• Manufactured to Siemens Quality Benchmarks: Trusted across commercial and industrial sectors
• RoHS Compliant (where applicable): Supports environmentally responsible specifications.

Where It Works Best

• This breaker is a strong choice when you need dependable protection without overcomplicating things:
• Commercial buildings and tenant spaces
• Industrial equipment and machinery protection
• Manufacturing facilities with three-phase systems
• Electrical distribution panels requiring solid fault protection
• Retrofit or replacement projects where compatibility and reliability matter