Siemens 3VA4120-4ED14-0AA0 - 14-0A, 1-Pole, Circuit Breaker

Meet the Siemens 3VA4120-4ED14-0AA0, a purpose-built circuit breaker designed for dependable overcurrent protection in demanding electrical environments. With a 140A rating and a 1-pole configuration, this device delivers targeted protection for single-phase circuits while helping you keep panel layouts compact and organized.

Key strengths that matter in real-world installs

• Precise single-pole protection—optimizes protection for feeders and individual circuits without adding unnecessary complexity to your distribution panels.
• Robust industrial and commercial applicability—well-suited for panelboards, switchboards, and control panels in both new builds and retrofit projects.
• Reliable operation in motor control centers—designed to integrate smoothly into motor-driven applications where consistent protection is essential.

Important specifications at a glance

• Current rating: 140A
• Poles: 1-Pole
• Breaker type: Circuit Breaker
• Model: Siemens 3VA4120-4ED14-0AA0

Ideal applications

This 1-pole Siemens breaker is purposely designed for industrial facilities, commercial buildings, and OEM environments where robust overcurrent protection is a must. It fits seamlessly into distribution panels and motor control centers, delivering reliable safety for critical equipment and circuits without sacrificing space or accessibility.

What problems it helps solve

By providing targeted overcurrent protection for single-phase circuits, this breaker reduces the risk of damage from overloads and short circuits. Its compact, straightforward design supports quicker installation, easier maintenance, and improved panel organization—helping technicians diagnose and service electrical systems with confidence.

How it compares to typical alternatives

Compared to multi-pole or larger-rated devices, the 1-pole configuration offers a streamlined approach for circuits that don’t require extra poles, freeing panel space and simplifying wiring. Its Siemens origin ensures compatibility with broader Siemens architectures and component families, helping maintain consistency across your electrical infrastructure.

Practical tips for installation and use

• Follow standard mounting and wiring practices for panelboards, switchboards, and control panels to ensure reliable performance.
• Verify the 140A rating aligns with your circuit load and protective coordination plan before integrating into a distribution panel.
• Store and handle the breaker per manufacturer guidelines to preserve contact reliability and trip characteristics over time.