3VA5335-7EC31-0AA0 - 350A Class CJAS 3-Pole Circuit Breaker

3VA5335-7EC31-0AA0 - 350A Class CJAS 3-Pole Circuit Breaker

The Siemens 3VA5335-7EC31-0AA0 is a 350-amp, 3-pole circuit breaker built for systems that carry serious loads and don’t have room for failure. It’s part of the 3VA5 line, so you’re getting a newer-generation design designed for everyday use in commercial and industrial setups. This one uses a thermal-magnetic trip unit (TM230). In plain terms, it handles overloads and short circuits the way you’d expect—nothing overly complicated, nothing you have to babysit. The overload protection is fixed at 350A, so what you see is what you get. For short-circuit protection, you’ve got an adjustable instantaneous trip (5–10x), which helps when you’re trying to match it up with the rest of your gear. Where it stands out is fault handling. It’s rated 100 kA at 480V AC, so it’s built to clear high fault currents without hesitation. That’s the kind of spec you want in places where a bad fault can take out more than just a breaker. It’s also not oversized for what it does. The footprint is reasonable, which matters when you’re working inside a packed panel. Just note that lugs aren’t included, so plan for that.

Key Features and Benefits

• 350A breaker for higher-load applications
• 100 kA interrupting rating @ 480V AC for strong fault protection
• Thermal-magnetic trip (TM230)—simple, proven protection style
• Fixed overload setting (Ir = 350A)
• Adjustable instantaneous trip (5–10x In)
• 3-pole for three-phase systems
• Compact enough for tighter panel spaces
• Built for steady, long-term use

Technical Specifications

• Part Number: 3VA5335-7EC31-0AA0
• Series: Siemens 3VA5
• Amperage: 350A
• Frame Size: 400A
• Poles: 3
• Trip Unit: TM230 Thermal Magnetic
• Interrupting Rating: 100 kA @ 480V AC
• Overload Protection (Ir): Fixed at 350A
• Short-Circuit Protection (II): Adjustable, 5–10x In
• Dimensions:
  • Height: 9.8"
  • Width: 6.3"
  • Depth: 5.9"
• Lugs: Not included

Material Compliance and Certifications

• UL Listed for use in U.S. electrical systems
• Meets standard requirements for molded case circuit breakers
• Manufactured to Siemens quality standards

Where It Works Best

You’ll typically see this used in commercial buildings, industrial panels, and equipment feeds where 350A capacity makes sense. It’s a good fit for manufacturing, larger HVAC systems, and facilities with higher available fault current—basically anywhere you need solid protection without overthinking it.