3VA5212-6EC31-0AA0 - HFAS 125 Amp Circuit Breaker

3VA5212-6EC31-0AA0 - HFAS 125 Amp Circuit Breaker

The Siemens 3VA5212-6EC31-0AA0 is a 125 amp, 3-pole breaker built for straightforward, reliable circuit protection. No extra complexity here—just a solid thermal magnetic unit that does exactly what it’s supposed to do. This model comes with fixed trip settings, so once it’s in, you don’t have to mess with adjustments. It handles overloads at its rated capacity and trips instantly on short circuits at 10x the current. That kind of consistency is what makes it a go-to choice for panels that need to stay up and running without constant attention. It’s part of the Siemens 3VA5 line, so you’re getting a design that’s widely used in commercial and industrial setups. Whether you’re building a panel or swapping out an older unit, this is the kind of breaker you install and move on from.

Key Features and Benefits

• 125 amp rating for standard distribution loads
• 3-pole configuration for three-phase systems
• Thermal magnetic trip unit (TM230)
• 35kA interrupting capacity at 480V
• Fixed overload protection (Ir = 125A)
• Instantaneous trip at 10x rated current
• Compact frame size for easier panel fitment
• Consistent performance without adjustments

Technical Specifications

• Part Number: 3VA5212-6EC31-0AA0
  
• Series: 3VA52
  
• Poles: 3
  
• Amperage: 125A
  
• Interrupting Rating: 35kA @ 480V
  
• Trip Unit: Thermal Magnetic (TM230)
  
• Overload Protection (Ir): 125A (fixed)
  
• Instantaneous Trip (Ii): 10 × In
  
• Dimensions:
  • Height: 9.65 in
  • Width: 6.3 in
  • Depth: 5.9 in

Material Compliance and Certifications

• UL-listed and built to meet standard North American electrical requirements. Siemens keeps their manufacturing consistent, which is why these are commonly specified in both new installs and replacements.
  

Where It Works Best

• Commercial electrical panels
• Industrial equipment protection
• OEM panel builds
• Manufacturing facilities
• Replacement for existing 125A 3-pole breakers