3VA5330-5EC61-0AA0 - 300A Class MJAS 2-Pole Circuit Breaker

3VA5330-5EC61-0AA0 - 300A Class MJAS 2-Pole Circuit Breaker

If you’re running a system that pulls serious current, you don’t want to second-guess your protection. The Siemens 3VA5330-5EC61-0AA0 circuit breaker is built for that exact situation—steady 300A performance with dependable protection when something goes wrong. This model is part of Siemens’ 3VA5 series, a line widely used in commercial and industrial environments where equipment downtime isn’t an option. It uses a thermal magnetic trip unit, which means it handles both overloads and short circuits without needing a complicated setup. In plain terms: it reacts when it should, and stays out of the way when everything’s running normally. You’re working with a 2-pole breaker in a 3-pole frame, giving you flexibility when fitting it into existing panels. And with a 35 kA interrupting rating at 480V AC, it’s designed to deal with real fault conditions—not just ideal scenarios on paper. It’s the kind of breaker electricians install and don’t have to think about again.

Key Features and Benefits

• 300 Amp rating for high-demand electrical systems
• Thermal magnetic trip (TM230) for combined overload and short-circuit protection
• 35 kA interrupting capacity @ 480V AC for strong fault handling
• Adjustable instantaneous trip (5–10x In) for better system coordination
• 2-pole design in a 3-pole frame for flexible installation
• Fixed overload protection (Ir = 300A) for consistent performance
• Compact footprint that fits standard panel setups
• Built for long-term, dependable operation

Technical Specifications

• Part Number: 3VA5330-5EC61-0AA0
• Series: Siemens 3VA53
• Frame Size: 400A
• Poles: 2 (in 3-pole frame)
• Rated Current: 300A
• Trip Unit: Thermal Magnetic (TM230)
• Overload Protection (Ir): 300A (fixed)
• Instantaneous Trip (Ii): 5–10x In
• Interrupt Rating: 35 kA @ 480V AC
• Dimensions: 9.8" H x 6.3" W x 5.9" D
• Mounting Type: Fixed (FTAM)
• Lugs: Not included

Material Compliance and Certifications

• The Siemens 3VA5 series is manufactured to meet UL standards for molded case circuit breakers, making it suitable for use in U.S. commercial and industrial electrical systems. It’s built with materials designed for safe operation and consistent performance over time.

Where It Works Best

• This breaker is commonly used in commercial buildings, industrial facilities, and power distribution panels where a 300A breaker is required. It’s a practical fit for equipment protection, feeder circuits, and control panels—especially where reliability matters more than complexity.