Siemens 3VA5120-4ED11-0AA0 0A 1-Pole 3 V Circuit Breaker

Meet the Siemens 3VA5120-4ED11-0AA0, a compact, single-pole circuit breaker purpose-built for protection in small, low-voltage control circuits. With a 3 V voltage rating and a single-pole design, this unit is designed to guard delicate electronics and control gear from overcurrent events in environments where space and precision matter.

Key specifications at a glance

• Part number: 3VA5120-4ED11-0AA0
• Current rating: 0 A
• Poles: 1
• Voltage rating: 3 V

Why choose this Siemens circuit breaker?

Unlike generic breakers, the 3VA5120-4ED11-0AA0 is built to integrate seamlessly with Siemens control gear and modular panels. Its compact form factor delivers dependable overcurrent protection without crowding crowded electrical enclosures, making it ideal for instrumentation, automation panels, or test rigs where every millimeter counts.

What problems does it solve?

In circuits with tight tolerances and low voltage rails, protecting sensitive components from unexpected surges is critical. This breaker provides a precise, predictable response within its 3 V rating, helping prevent damage to logic circuits, relays, sensors, and microcontroller-powered devices. The single-pole configuration simplifies wiring for straightforward protection of a single load line.

Practical use cases

• Protection for 3 V control circuits in automation panels and PLC-related equipment
• Safe guarding instrumentation and sensor arrays in lab setups and prototyping benches
• Compact protection solution for small-footprint electronic enclosures and test rigs

Installation and compatibility tips

Ensure your application operates within the 3 V voltage rating and that a 1-pole protective device matches the circuit you intend to guard. This Siemens part is designed for integration within Siemens electrical architectures, so verify panel compatibility and mounting method with your enclosure or distribution board. Handle with standard electro-mechanical safety practices and replace if any signs of damage or wear appear.

With the Siemens 3VA5120-4ED11-0AA0, you get a purpose-built, traceable component that supports reliable, repeatable protection for small-voltage control circuits, instrumentation racks, and educational lab setups—where predictable behavior and compatibility with Siemens ecosystem matter most.