3VA5330-6EF31-0AA0 - 300A Class HJAS 3-Pole Circuit Breaker

3VA5330-6EF31-0AA0 - 300A Class HJAS 3-Pole Circuit Breaker

The Siemens 3VA5330-6EF31-0AA0 is a 3-pole, 300 amp molded case circuit breaker designed for standard commercial and industrial power distribution. It’s part of the 3VA5 series, built for consistent protection without unnecessary complexity. This unit uses a thermal magnetic trip system. That means it handles overloads over time and reacts quickly to short circuits. You also get some flexibility—overload protection can be adjusted from 240A up to 300A, and the instantaneous trip can be set between 5 and 10 times the rated current. That helps when you’re trying to match the breaker to your actual load conditions instead of forcing a fixed setup. With a 65 kA interrupting rating at 480V AC, it’s suitable for systems where higher fault current is a concern. It’s a 400A frame, so you’ve got some headroom in the design as well. Physically, it’s compact enough to fit into most standard panel configurations, but still solidly built the way you’d expect from Siemens.

Key Features and Benefits

• 300 amp rating for three-phase systems
• Thermal magnetic trip (overload + short circuit protection)
• Adjustable overload range: 240A–300A
• Adjustable instantaneous trip: 5x–10x In
• 65 kA interrupting capacity at 480V AC
• 3-pole configuration
• 400A frame size

Technical Specifications

• Part Number: 3VA5330-6EF31-0AA0
  
• Series: 3VA53 / 3VA5
  
• Poles: 3
  
• Amps: 300A
  
• Frame Size: 400A
  
• Trip Unit: TM240 (thermal magnetic)
  
• Overload Setting (Ir): 240–300A
  
• Short-Circuit Setting (Ii): 5–10x In
  
• Interrupt Rating: 65 kA @ 480V AC (Class H)
  
• Dimensions: 9.8" H × 6.3" W × 5.9" D
  
• Lugs: Not included
  

Material Compliance and Certifications

• Built to meet UL standards for low-voltage circuit protection. That’s important for code compliance and general safety in U.S. installations.
  

Where It Works Best

• Commercial electrical panels
• Industrial equipment and control panels
• Power distribution systems
• Facilities with three-phase power setups