3VA5330-7EC61-0AA0 - 300A Class CJAS 2-Pole Circuit Breaker

3VA5330-7EC61-0AA0 - 300A Class CJAS 2-Pole Circuit Breaker

If you’re working with higher loads, you don’t spend time thinking about circuit breakers—until one doesn’t do its job. The Siemens 3VA5330-7EC61-0AA0 is the kind of unit you install and move on from, because it handles what it’s supposed to without drama. It’s rated at 300 amps and uses a thermal magnetic trip unit, so it reacts to both sustained overloads and sudden faults without delay. There’s no fine-tuning needed on the overload side—it’s fixed at 300A. That’s usually a plus in real-world use since it removes the chance of someone setting it wrong. For short-circuit conditions, you still get an adjustable instantaneous trip range (5 to 10 times the rated current), which gives you some room to match the system you’re working with. It also carries a 100kA interrupting rating at 480V AC, so it’s built for environments where available fault current is on the higher side. The 2-pole setup sits in a 3-pole frame, which can make retrofits or panel standardization a little easier depending on your layout. Not flashy, but that’s the point—it just works.

Key Features and Benefits

• Rated at 300A for higher load applications
• Thermal magnetic trip unit (TM230) handles overloads and short circuits
• 100kA interrupting capacity at 480V AC
• Instantaneous trip adjustable from 5–10x
• Fixed overload setting (300A) keeps things simple
• 2-pole breaker in a 3-pole frame
• Sized to fit typical commercial and industrial panels

Technical Specifications

• Part Number: 3VA5330-7EC61-0AA0
• Series: Siemens 3VA5
• Frame Size: 400A
• Amperage: 300A
• Poles: 2 (in 3-pole frame)
• Trip Unit: TM230 (Thermal Magnetic)
• Overload Protection (Ir): 300A (fixed)
• Short-Circuit Protection (Ii): 5–10x adjustable
• Interrupting Rating: 100kA @ 480V AC
• Dimensions: 9.8 in (H) × 6.3 in (W) × 5.9 in (D)
• Lugs: Not included
• Interrupting Class: C (CJAS)

Material Compliance and Certifications

• Built to meet UL standards for molded case circuit breakers, so it aligns with common U.S. electrical requirements for safety and performance.

Where It Works Best

• Commercial buildings with larger electrical loads
• Industrial equipment and machinery
• Distribution panels and switchboards
• Facilities where higher fault current is a factor