3VA5212-7ED31-0AA0 - CFAS 125 Amp Circuit Breaker

3VA5212-7ED31-0AA0 - CFAS 125 Amp Circuit Breaker

If you’re sourcing a 125 amp 3-pole circuit breaker for a 480V system, chances are you already know what matters—reliability, proper fault protection, and something you don’t have to babysit after installation. That’s exactly where the Siemens 3VA5212-7ED31-0AA0 fits in. This breaker is built for real electrical environments, not ideal conditions. With a 100kA interrupting rating at 480V, it’s designed to clear high fault currents safely without hesitation. That makes it a strong choice for commercial panels, industrial equipment, and any setup where available fault current is on the higher side. What many installers like about this model is its simplicity. The thermal magnetic trip unit (TM210) comes with fixed protection—overload is set at 125 amps, and short-circuit protection trips instantly at 10x that rating. No adjustments, no fine-tuning. Install it, wire it, and move on to the next job. And since it’s part of the Siemens 3VA5 series, you’re getting a modern, compact design that fits cleanly into most panelboards and switchgear setups without wasting space.

Key Features and Benefits

• 100kA @ 480V interrupting capacity: Built to handle high fault current safely
• 125 amp rating: Ideal for a wide range of commercial and light industrial loads
• 3-pole breaker: Full protection across all three phases
• Thermal magnetic trip unit (TM210): Covers both overload and short-circuit conditions
• Fixed trip settings: No calibration required, which saves time during install
• Instantaneous trip at 10x In: Quick response helps reduce potential damage
• Compact 3VA5 frame: Easier fit in tighter panel spaces

Technical Specifications

• Manufacturer: Siemens
  
• Part Number: 3VA5212-7ED31-0AA0
  
• Series / Type: 3VA52
  
• Poles: 3
  
• Amperage: 125A
  
• Interrupting Rating: 100kA @ 480V
  
• Frame Size: 250
  
• Trip Unit: TM210 (Thermal Magnetic)
  
• Overload Protection (Ir): Fixed at 125A
  
• Short-Circuit Protection (Ii): 10x In
  
• Dimensions (H x W x D): 9.65" x 6.3" x 5.9"
  

Material Compliance and Certifications

• UL Listed: for use in North American electrical systems
• Industry Standards: Designed to meet standard industry safety and performance requirements
• Construction: Manufactured using durable components suitable for long-term electrical protection

Where It Works Best

• This Siemens 125A breaker is a practical fit for commercial buildings and tenant build-outs, industrial control panels and machinery, manufacturing environments with higher fault levels, 480V distribution systems, and replacement or retrofit projects where reliability matters more than adjustability.