3VA5140-1MU31-0AA0 SIEMENS

The 3VA5140-1MU31-0AA0 is a robust 3-pole circuit breaker from Siemens, designed for reliable starter protection within UL frame 125 systems. This circuit breaker features a TM120M trip unit, specifically configured for AM (Starter Protection) applications. It has a rated current (In) of 40A, making it suitable for protecting circuits with corresponding current demands. Notably, this model does not include overload protection, focusing solely on short-circuit protection. The short-circuit protection (Ii) is set at 3 to 7 times the rated current (In), providing rapid response to fault conditions. This ensures quick disconnection of the circuit in the event of a short circuit, minimizing potential damage to equipment and wiring. The absence of connection terminals allows for flexible integration with various connection systems based on specific application requirements. This circuit breaker is ideal for applications where starter protection is paramount and overload protection is handled separately. Its compact design and reliable performance make it a valuable component in industrial and commercial electrical systems, ensuring safety and operational continuity.