3VA5222-5EF31-0AA0 - MFAS 225 Amp Circuit Breaker

3VA5222-5EF31-0AA0 - MFAS 225 Amp Circuit Breaker

When you’re picking a circuit breaker, you’re not looking for anything fancy—you just want something that’s going to work when it needs to. The Siemens 3VA5222-5EF31-0AA0 is one of those breakers you install and don’t have to worry about again. It’s a 225 amp, 3-pole breaker made for three-phase systems, so it fits right into most commercial and industrial setups. The thermal magnetic trip unit keeps things simple. It handles overloads over time and trips instantly if there’s a short circuit. No complicated adjustments—just solid, predictable protection. With a 35kA interrupting rating at 480V, it’s built to deal with higher fault levels you’ll typically see in real-world applications. It’s also part of the Siemens 3VA5 series, which a lot of contractors stick with because it’s consistent and easy to work with across different jobs. Size-wise, it’s built on a 250 frame, so it doesn’t take up more space than it needs to. That makes a difference when you’re working inside a tight panel.

Key Features and Benefits

• 225 amp rating for standard commercial and industrial loads
• Thermal magnetic trip for overload and short-circuit protection
• 35kA interrupting capacity at 480V
• 3-pole design for three-phase systems
• Fixed instantaneous trip (10x In) for quick fault clearing
• Compact frame helps with panel space
• Part of the Siemens 3VA5 series

Technical Specifications

• Part Number: 3VA5222-5EF31-0AA0
  
• Series: 3VA52 (3VA5 family)
  
• Poles: 3
  
• Amperage: 225A
  
• Interrupting Rating: 35kA @ 480V
  
• Trip Unit: Thermal Magnetic (TM240, ATAM)
  
• Overload Protection (Ir): 225A (fixed)
  
• Short-Circuit Protection (Ii): 10 × In (fixed)
  
• Frame Size: 250
  
• Dimensions:
  • 9.65" H × 6.3" W × 5.9" D

Material Compliance and Certifications

• This breaker meets UL standards and follows common electrical safety requirements. Siemens builds the 3VA5 line to hold up in everyday use, which is why it’s a go-to option for many professionals .

Where It Works Best

• Commercial buildings
• Industrial equipment and panels
• Manufacturing facilities
• Three-phase power distribution systems
• Replacement or upgrade projects