Siemens 3VA5140-5ED31-0AA0 0A 3-Pole 3 V Circuit Breaker

Meet the Siemens 3VA5140-5ED31-0AA0, a 3-pole circuit breaker built for tri‑phase protection in compact electrical panels. With a current rating of 0 A and a voltage rating of 3 V, this device is engineered for specific low‑voltage protection roles within Siemens installations and controlled circuits.

Key specifications

• Part number: 3VA5140-5ED31-0AA0
• Poles: 3
• Current rating: 0 A
• Voltage rating: 3 V
• Series/compatibility: Siemens 3VA family

What makes it unique

The three‑pole design provides simultaneous isolation across all conductors in a three‑phase circuit, reducing the risk of shared‑neutral faults or partial energization during servicing. The fixed 0 A rating is a distinctive aspect of this model, making it suitable for particular control or test configurations where a traditional trip current isn’t required but a certified protective device remains in place. Built by Siemens, this breaker carries the reliability and compatibility you expect in established control ecosystems and is designed to slot into existing Siemens 3VA‑based panels without custom modification.

Ideal use cases

• Three‑phase protection in compact control panels for automated equipment and small industrial rigs.
• Replacement part within Siemens installations that use the 3VA‑series protection family.
• Low‑voltage test benches or experimental setups that require a fixed, three‑pole protection device in the 3 V range.

Practical guidance for installation and operation

Before integrating this model, confirm that a 3 V voltage rating aligns with your system and that the 0 A current rating matches your protection strategy. Ensure proper mounting compatibility with your panel and follow standard electrical safety practices (de‑energize, lockout/tagout, and protective equipment). When wiring, keep conductors organized by phase and separate from neutral/ground paths to maintain clear isolation boundaries in the event of a fault.

If you’re updating an existing Siemens installation, this 3VA5140-5ED31-0AA0 breaker can be a direct‑fit replacement for three‑pole sections designed to accommodate the 3VA series, helping you maintain consistent performance and panel integrity over time.