What it is and what it fits
The Siemens 3VA9144-0JD11 is a circular conductor terminal in the SENTRON accessories line, designed for use with 3VA6 150/250 frame breakers. It ships as a set of four units, each accepting copper conductors from 14 AWG up to 1/0 AWG (stranded or finely stranded) or solid conductors from 14 AWG to 10 AWG. The wire stripping length is 0.7 in.
Terminal markings and compliance
The terminal carries dual markings: UL 14-1/0 CU9 TC1.3 CMC UR CSA and IEC 1.5-50 mm² CU NNL. That UL listing covers copper conductors in the 14 AWG to 1/0 AWG range with a TC1.3 temperature class; the IEC side confirms the metric equivalent range of 1.5 mm² to 50 mm². This dual certification means the terminal is accepted in both North American and European panel builds without a separate adapter.
Deployment context
This terminal mounts directly onto the line and load lugs of a 3VA6 150/250 molded-case breaker inside a panel. The circular conductor design accepts ring-tongue or fork terminals, so it suits field wiring where vibration resistance or repeated disconnect is a concern — typical in industrial switchboards and motor control centers.