3VA5335-5EC31-0AA0 - 350A Class MJAS 3-Pole Circuit Breaker

3VA5335-5EC31-0AA0 - 350A Class MJAS 3-Pole Circuit Breaker

If you’re working with a 350 amp setup, you already know this isn’t light-duty equipment. The Siemens 3VA5335-5EC31-0AA0 is built for those kinds of systems—where you need protection you don’t have to think about twice. This is a 3-pole breaker from the 3VA5 line, commonly used in commercial and industrial panels. It uses a thermal magnetic trip unit, so it handles both overloads and short circuits in a straightforward, proven way. The overload setting is fixed at 350 amps, and the instantaneous trip can be adjusted between 5 and 10 times that, depending on what your system calls for. It’s rated at 35 kA at 480V AC, which puts it in the range for handling real fault conditions—not just minor issues. In other words, when something goes wrong, this breaker is designed to react quickly and help limit the damage. Physically, it’s compact for a 400A frame, so it won’t eat up more panel space than it needs to. One thing to note—lugs aren’t included, so you’ll want to plan for that.

Key Features and Benefits

• 350 amp capacity for higher-load applications
• 3-pole configuration for three-phase systems
• Thermal magnetic protection (overload + short circuit)
• Adjustable instantaneous trip (5–10x range)
• 35 kA interrupting rating at 480V AC
• Fixed 350A overload setting
• Part of the Siemens 3VA5 / 3VA53 family
• Designed for consistent, day-to-day reliability

Technical Specifications

• Part Number: 3VA5335-5EC31-0AA0
• Series: 3VA5 (3VA53)
• Amperage: 350A
• Poles: 3
• Frame Size: 400A
• Interrupting Capacity: 35 kA @ 480V AC
• Trip Unit: Thermal Magnetic (TM230)
• Overload Protection (Ir): 350A (fixed)
• Instantaneous Trip (Ii): 5–10x adjustable
• Dimensions:
  • 9.8" H
  • 6.3" W
  • 5.9" D
• Lugs: Not included

Material Compliance and Certifications

• UL listed for use in standard U.S. applications
• Suitable for installations following NEC requirements
• Manufactured to meet typical commercial and industrial standards

Where It Works Best

• This is the kind of breaker you’ll usually find in commercial buildings, industrial facilities, and larger distribution panels. It makes sense for feeder circuits and three-phase systems where loads are higher and protection needs to be dependable.