3VA5340-7EC61-0AA0 - 400A Class CJAS 2-Pole Circuit Breaker

3VA5340-7EC61-0AA0 - 400A Class CJAS 2-Pole Circuit Breaker

If you’re dealing with serious electrical loads, you don’t have room for guesswork. The Siemens 3VA5340-7EC61-0AA0 is built for exactly that kind of environment—where reliability isn’t a bonus, it’s the baseline. This 400 amp breaker from the 3VA5 family gives you straightforward, dependable protection against overloads and short circuits, without unnecessary complexity. What stands out here is the balance between power and control. You’ve got a 2-pole setup inside a 3-pole frame, which gives you a bit more flexibility when you’re working within existing panel constraints. Add in a 100 kA interrupting rating at 480V, and you’re looking at a breaker that can comfortably handle high fault conditions without hesitation. It’s the kind of component you install and don’t have to think about again—which, frankly, is exactly what you want.

Key Features and Benefits

• 400 Amp Capacity – Built for high-demand systems that can’t afford interruptions
• 100 kA @ 480V AC – Strong fault-clearing capability for tougher applications
• Thermal Magnetic Trip Unit (TM230) – Simple, proven protection against overloads and short circuits
• Fixed Overload Protection – Set at 400A for consistent, predictable performance
• Adjustable Instantaneous Trip (5–10x) – Gives you some control over short-circuit response
• 2-Pole in 3-Pole Frame – Easier integration into a wider range of panel setups
• Compact Footprint – Doesn’t take up more space than it needs to

Technical Specifications

• Manufacturer: Siemens
• Part Number: 3VA5340-7EC61-0AA0
• Series / Type: 3VA53
• Amperage: 400A
• Poles: 2 (mounted in a 3-pole frame)
• Interrupting Rating: 100 kA @ 480V AC
• Trip Unit: Thermal Magnetic (TM230)
• Overload Protection (Ir): 400A (fixed)
• Short-Circuit Protection (II): 5–10x range
• Dimensions:
  • Height: 9.8 in
  • Width: 6.3 in
  • Depth: 5.9 in
• Lugs: Not included
• Interrupting Class: Class C (CJAS)

Material Compliance and Certifications

• UL Listed: This breaker is UL listed, which means it meets established safety and performance standards for use in commercial and industrial electrical systems. Siemens builds the 3VA5 line with long-term use in mind, using materials designed to hold up under real-world electrical stress—not just ideal conditions.

Where It Works Best

• You’ll typically see this breaker in places where downtime is expensive and protection matters:
• Commercial buildings and large facilities
• Industrial and manufacturing environments
• Main distribution panels and feeder circuits
• System upgrades where a higher interrupting capacity is needed
• Projects where space and flexibility both matter