What It Is and Where It Goes
The Siemens 3VM9254-0JA12 is a box terminal accessory — four units per order — designed for the 3VM12 series of molded-case circuit breakers. It's the termination point where the line or load conductors land on the breaker, and it wires up clean in a panel if you're terminating copper or aluminum within the gauge range the 3VM12 accepts. Each piece ships individually (packaging dimensions 190 x 120 x 30 mm), so you're getting four separate terminals in one order code.
Lifecycle and Compliance
RoHS compliant since October 1, 2014, and REACH Article 33 duty-to-inform documentation is available on request. No export restrictions under AL N / ECCN N.