Terminal Specification and Fit
The Siemens 3VA9132-0JJ12 is a SENTRON circular conductor terminal — an accessory for the 3VA4/5 125 molded-case circuit breaker family. It accepts copper or aluminum conductors from 4 AWG up to 300 kcmil, both stranded and finely stranded. The wire stripping length is 1.2 in. This is a lug-style terminal, not a pin or fork; it clamps the conductor in a circular barrel. The terminal carries a UL marking of TA2.1 CMC 4-300 CU7AL UR CSA, confirming UL and CSA recognition for copper and aluminum wire in that range. The IEC marking reads 25-150 mm² CU/AL NNL, which is the metric equivalent of the AWG/kcmil range. For a panel builder, this means the terminal is approved for both North American and IEC installations without requiring a separate adapter.