What it is and what the ratings mean
This 3VA4112-6ED14-3AA0 is a 1-pole circuit breaker from the Siemens 3VA4 series, built on a UL Frame 125 platform. It's rated for a continuous current of 125 A with a TM210 thermal-magnetic trip unit — the overload protection (Ir) is fixed at 125 A, and the short-circuit pickup (Ii) is set at 10 × In, so it holds until about 1250 A before the magnetic element trips. The breaking capacity is 65 kA at 277 V, which falls in the H (high) class — enough to safely clear a major fault on a 277/480 V distribution panel without the arc re-striking or the breaker welding shut.
Compliance and regulatory footprint
RoHS compliant since May 2019, with a REACH Article 33 disclosure for lead (CAS 7439-92-1) above 0.1% w/w — standard for this class of industrial breaker. Export control is straightforward: AL N / ECCN EAR99, no special license required for most destinations. The product class is C, meaning it's manufactured to order and not a stocked returnable item, so plan your lead time accordingly.