What this breaker is and what the ratings mean
The Siemens 3VA4150-5ED24-3AA0 is a 2-pole molded-case circuit breaker from the 3VA4 family, UL Frame 125, with a 50 A fixed thermal-magnetic trip unit (TM210, FTFM). The interrupting rating of 35 kA at 480 V means it can safely clear a fault up to that level on a 480 V line without welding contacts or rupturing the case — that is the number that decides whether this breaker holds on a high-fault panel feed, not the continuous current alone. Short-circuit protection is fixed at 10 x In (500 A magnetic pickup), so it is sized for general branch-circuit and feeder protection where you want a moderate instantaneous threshold to ride out motor inrush.
Compliance and documentation
RoHS compliant since 13-05-19. REACH Article 33 disclosure: contains lead (CAS-No. 7439-92-1) above 0.1% w/w. Export Control Classification: AL: N / ECCN: EAR99. Packaging dimensions: 472 x 396 x 213 mm, quantity unit: 1 piece.