3VA5330-7EF31-0AA0 - 300A Class CJAS 3-Pole Circuit Breaker
- 300 Amp
- 3 Pole
Purchase Options: New
3VA5330-7EF31-0AA0 - 300A Class CJAS 3-Pole Circuit Breaker Description
3VA5330-7EF31-0AA0 - 300A Class CJAS 3-Pole Circuit Breaker
The Siemens 3VA5330-7EF31-0AA0 is a 3-pole, 300-amp thermal magnetic circuit breaker designed for standard commercial and industrial use. It’s part of the 3VA5 series, so it’s built for consistent performance in everyday power distribution—not overcomplicated, just reliable. You’ve got some flexibility with this one. The overload setting can be adjusted between 240A and 300A, which helps when your load isn’t perfectly fixed. The instantaneous trip range (5x to 10x) also gives you some control over how the breaker reacts to faults, which can help reduce nuisance trips. It uses a 400A frame, so there’s some built-in margin, and the size is typical for this class—nothing unusual to deal with during installation.
Key Features and Benefits
- Adjustable overload range: 240A–300A
- Thermal magnetic protection: Thermal magnetic protection (overload + short circuit)
- Instantaneous trip setting: 5x–10x
- 3-pole: 3-pole for three-phase systems
- Frame size: 400A frame size
- Design: Standard, easy-to-fit design
Technical Specifications
- Part Number: 3VA5330-7EF31-0AA0
- Series: Siemens 3VA5
- Poles: 3
- Amps: 300A
- Frame Size: 400A
- Overload (Ir): 240A – 300A
- Instantaneous (Ii): 5x – 10x In
- Interrupting Class: C (CJAS)
- Voltage: Up to 480V AC
- Dimensions: 9.8" H x 6.3" W x 5.9" D
- Lugs: Not included
Material Compliance and Certifications
- UL Listed
- Meets standard U.S. safety requirements
- Suitable for NEC applications when installed correctly
Where It Works Best
This is a straightforward fit for commercial panels, industrial equipment, and general power distribution. It’s typically used anywhere you need a dependable 300A breaker with a bit of adjustability—nothing specialized, just solid, everyday use.
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Specifications
- Depth:5.9
- Height:9.8
- Width:6.3
- Poles:3
- Amperes:300
- Type:3VA53
- Approx Dimensions:9.80"H x 5.4"W x 5.4"D
- Additional Notes:C-Interrupting Class (CJAS) Thermal Magnetic circuit breaker 3VA5 UL 400A Frame Size, 3-Pole, class C 100 kA @ 480 V.AC, line protection TM240, ATAM, In=300 A overload protection Ir=240A-300A short-circuit protection Ii=5-10 x. Lugs NOT included
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