3VA5335-7EF31-0AA0 - 350A Class CJAS 3-Pole Circuit Breaker

3VA5335-7EF31-0AA0 - 350A Class CJAS 3-Pole Circuit Breaker

The Siemens 3VA5335-7EF31-0AA0 is a 350A, 3-pole circuit breaker designed for straightforward, reliable protection in commercial and industrial setups. It uses a thermal magnetic trip unit, so you’re covered on both overloads and short circuits without getting into anything overly complicated. One of the practical advantages here is the adjustable settings—you can fine-tune the breaker to match your system instead of forcing your system to work around the breaker. Built on a 400A frame, it gives you a bit of headroom while still staying compact enough to fit comfortably in most panel configurations. This is the kind of breaker you’d use when you need dependable performance for feeders, equipment, or distribution—nothing flashy, just solid protection that does its job day in and day out.

Key Features and Benefits

• Thermal magnetic trip unit for everyday overload and short-circuit protection
• Adjustable overload setting from 280A to 350A
• Instantaneous trip adjustable from 5x to 10x the rated current
• C-interrupting class (CJAS) for higher fault capacity applications
• 400A frame with a 350A rating
• 3-pole configuration for three-phase systems
• Space-conscious design for easier panel integration

Technical Specifications

• Part Number: 3VA5335-7EF31-0AA0
  
• Series: 3VA5
  
• Frame Size: 400A
  
• Amperage: 350A
  
• Poles: 3
  
• Trip Unit: TM240, ATAM
  
• Overload Range (Ir): 280A–350A
  
• Short-Circuit Range (Ii): 5–10x In
  
• Interrupting Class: C (CJAS)
  
• Dimensions:
  • 9.8" H x 6.3" W x 5.9" D
• Lugs: Not included
  

Material Compliance and Certifications

• This breaker is built to meet UL standards for low-voltage circuit protection.
• It’s designed for consistent performance under normal load conditions as well as during fault events.

Where It Works Best

• Commercial electrical panels
• Industrial distribution systems
• Motor and equipment protection
• HVAC systems
• General-purpose three-phase applications