3VA5215-5EF31-0AA0 - MFAS 150 Amp Circuit Breaker

3VA5215-5EF31-0AA0 - MFAS 150 Amp Circuit Breaker

If you’re responsible for keeping electrical systems running smoothly, you already know—failure isn’t an option. The Siemens 3VA5215-5EF31-0AA0 circuit breaker is built for exactly that kind of pressure. Designed for commercial and industrial applications, this 150 amp, 3-pole breaker delivers consistent, no-nonsense protection where it matters most.

What sets this model apart is its balance of simplicity and performance. With a thermal magnetic trip unit (TM240), you get dependable overload protection paired with fast short-circuit response—without the need for complicated adjustments. It’s engineered to react when it should, stay stable when it must, and keep your operation moving without interruption.

And when fault conditions hit hard, this breaker is ready. With a 35kA interrupting capacity at 480V, it’s built to handle serious electrical events while protecting downstream equipment. That means less risk, less damage, and fewer costly shutdowns.

Key Features and Benefits

• 150 Amp Continuous Protection: Ideal for maintaining steady performance in demanding electrical systems.
• 35kA @ 480V Interrupting Rating: Handles high fault currents with confidence.
• Thermal Magnetic Trip (TM240): Combines precision overload protection with rapid short-circuit response.
• Fixed Protection Settings: Overload (Ir) set at 150A and short-circuit (Ii) at 10x In for consistent, predictable operation.
• 3-Pole Design: Built for three-phase power distribution environments.
• Compact 3VA5 Frame (250 Frame): Saves panel space without sacrificing capability.
• Proven Siemens Build Quality: Designed for durability and long-term reliability in real-world conditions.

Technical Specifications

• Part Number: 3VA5215-5EF31-0AA0
• Series: Siemens 3VA52
• Amperage: 150A
• Poles: 3
• Interrupting Capacity: 35kA @ 480V
• Frame Size: 250
• Trip Unit: TM240 (Thermal Magnetic)
• Overload Protection (Ir): 150A (fixed)
• Short-Circuit Protection (Ii): 10 × In (fixed)
• Dimensions:
  • Height: 9.65 in
  • Width: 6.3 in
  • Depth: 5.9 in

Material Compliance and Certifications

• UL Listed: Meets strict U.S. safety and performance standards.
• Code-Ready Design: Suitable for installations requiring NEC compliance.
• Industrial-Grade Components: Built to perform reliably in demanding electrical environments.

Where It Works Best

• This breaker is a strong choice for commercial facilities, industrial plants, and OEM panel builders who need dependable line protection without overcomplication. It’s especially effective in distribution panels, switchboards, and motor control centers, where consistent performance and fast fault response are critical.