3VA5290-7EC31-0AA0 - CFAS 90 Amp Circuit Breaker

3VA5290-7EC31-0AA0 - CFAS 90 Amp Circuit Breaker

The Siemens 3VA5290-7EC31-0AA0 is the kind of breaker you put in and don’t have to think about again. It’s a 90 amp, 3-pole unit built for 480V systems where fault current can get high and you need something that reacts fast and does its job without fuss. With a 100kA interrupting rating, it’s meant for tougher environments—not light-duty panels. If you’re working in a commercial building or an industrial setup, that extra interrupting capacity matters. It gives you a margin of safety when things don’t go as planned. This model uses a thermal magnetic trip with fixed settings. Overload is set at 90 amps, and the instantaneous trip is locked in at 10 times that. There’s nothing to dial in or tweak. For a lot of installers and maintenance teams, that’s actually a plus—less time adjusting, fewer variables to worry about. Size-wise, it’s pretty manageable for a 250 frame breaker. It fits where you expect it to, and it doesn’t turn into a project just getting it mounted. Once it’s installed, it just sits there and does what it’s supposed to do.

Key Features and Benefits

• 90 amp rating for typical commercial and equipment loads
• 3-pole breaker for full three-phase protection
• 100kA interrupting rating at 480V for higher fault current systems
• Thermal magnetic trip – simple, proven protection method
• Fixed trip settings – no adjustments needed in the field
• Instantaneous trip at 10x current for quick fault clearing
• Part of the Siemens 3VA5 series (250 frame)
• Designed for line protection applications

Technical Specifications

• Part Number: 3VA5290-7EC31-0AA0
  
• Manufacturer: Siemens
  
• Series: 3VA52 / 3VA5
  
• Poles: 3
  
• Amps: 90A
  
• Interrupting Rating: 100kA @ 480V
  
• Trip Type: Thermal Magnetic (TM230)
  
• Overload Setting: 90A (fixed)
  
• Short-Circuit Trip: 10x rated current
  
• Frame Size: 250
  
• Dimensions:
  • Height: 9.65 in
  • Width: 6.3 in
  • Depth: 5.9 in

Material Compliance and Certifications

• UL Listed for use in North American systems
• Meets standard electrical safety requirements for molded case circuit breakers
• Built in line with current material and environmental guidelines where required

Where It Works Best

• You’ll typically see this breaker used in:
• Commercial panelboards
• Industrial equipment and control panels
• Facilities with higher available fault current
• HVAC systems and motor loads
• General 480V distribution